Update Jest to v30 (#15580)

package.json

@@ -137,8 +137,8 @@
     "eslint-plugin-unicorn": "49.0.0",
     "esm-utils": "4.2.1",
     "execa": "7.2.0",
-    "jest": "29.7.0",
-    "jest-light-runner": "0.5.1",
+    "jest": "30.0.0-alpha.2",
+    "jest-light-runner": "0.6.0-alpha.1",
     "jest-snapshot-serializer-ansi": "2.1.0",
     "jest-snapshot-serializer-raw": "2.0.0",
     "jest-watch-typeahead": "2.2.2",

tests/format/flow-repo/enums/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`declared.js [babel-flow] format 1`] = `
     |         ^
   4 |   A,
   5 |   B,
-  6 | }"
+  6 | }
+Cause: Unexpected token (3:8)"
 `;
 
 exports[`declared.js format 1`] = `
@@ -65,7 +66,8 @@ exports[`lib.js [babel-flow] format 1`] = `
     |           ^
   5 |     J,
   6 |     K,
-  7 |   }"
+  7 |   }
+Cause: Unexpected token (4:10)"
 `;
 
 exports[`lib.js format 1`] = `

tests/format/flow-repo/tuples/__snapshots__/jsfmt.spec.js.snap

@@ -60,7 +60,8 @@ exports[`spread.js [babel-flow] format 1`] = `
     |           ^
   2 |
   3 | type B = [...foo: S];
-  4 |"
+  4 |
+Cause: Unexpected token (1:10)"
 `;
 
 exports[`spread.js format 1`] = `

tests/format/flow-repo/type-guards/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`comments-in-type-annotations.js [babel-flow] format 1`] = `
     |                                                   ^
   4 |
   5 | const arrow = (x: any): /* C1 */ x is (number /* C2 */ => /* C3 */ x /* C4 */ is /* C5 */ string /* C6 */ => /* C7 */ x /* C8 */ is /* C9 */ boolean) => true;
-  6 |"
+  6 |
+Cause: Unexpected token, expected "{" (3:50)"
 `;
 
 exports[`comments-in-type-annotations.js format 1`] = `
@@ -49,7 +50,8 @@ exports[`passing.js [babel-flow] format 1`] = `
     |                    ^
   6 |
   7 | const arrow0 = (x: any): x is A => true;
-  8 | const arrow1 = (x: any): x is (y: A) => B => true;"
+  8 | const arrow1 = (x: any): x is (y: A) => B => true;
+Cause: Unexpected token, expected "{" (5:19)"
 `;
 
 exports[`passing.js format 1`] = `

tests/format/flow/as-const/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`embedded.js [babel-flow] format 1`] = `
     |           ^
   4 |
   5 | const HTML_WITH_CONST = /* HTML */ \`
-  6 | <div>"
+  6 | <div>
+Cause: Unexpected token (3:10)"
 `;
 
 exports[`embedded.js format 1`] = `

tests/format/flow/as-satisfies-expression/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`as.js [babel-flow] format 1`] = `
     |                           ^
   4 | this.isTabActionBar((e.target || e.srcElement) as HTMLElement);
   5 | (originalError ? wrappedError(errMsg, originalError) : Error(errMsg)) as InjectionError;
-  6 | 'current' in (props.pagination as {...});"
+  6 | 'current' in (props.pagination as {...});
+Cause: Unexpected token, expected "," (3:26)"
 `;
 
 exports[`as.js format 1`] = `
@@ -138,7 +139,8 @@ exports[`as-const.js [babel-flow] format 1`] = `
      |           ^
   13 |
   14 | (type) as const;
-  15 |"
+  15 |
+Cause: Unexpected token (12:10)"
 `;
 
 exports[`as-const.js format 1`] = `
@@ -189,7 +191,8 @@ exports[`assignment.js [babel-flow] format 1`] = `
      |                       ^
   18 |
   19 | this.intervalID = (setInterval(() => {
-  20 |   self.step();"
+  20 |   self.step();
+Cause: Unexpected token, expected "," (17:22)"
 `;
 
 exports[`assignment.js format 1`] = `
@@ -252,7 +255,8 @@ exports[`export_default_as.js [babel-flow] format 1`] = `
   2 |
 > 3 | export default (function log() {} as typeof console.log)
     |                                   ^
-  4 |"
+  4 |
+Cause: Unexpected token, expected "," (3:34)"
 `;
 
 exports[`export_default_as.js format 1`] = `
@@ -281,7 +285,8 @@ exports[`long-identifiers.js [babel-flow] format 1`] = `
      |                                     ^
   12 | };
   13 |
-  14 | averredBathersBoxroomBuggyNurl("
+  14 | averredBathersBoxroomBuggyNurl(
+Cause: Unexpected token, expected "," (11:36)"
 `;
 
 exports[`long-identifiers.js format 1`] = `
@@ -337,7 +342,8 @@ exports[`nested-await-and-as.js [babel-flow] format 1`] = `
      |                                 ^
    8 |   ).getChildren()
    9 |   ).length
-  10 |"
+  10 |
+Cause: Unexpected token, expected "," (7:32)"
 `;
 
 exports[`nested-await-and-as.js format 1`] = `
@@ -378,7 +384,8 @@ exports[`return.js [babel-flow] format 1`] = `
 > 7 |   } as Foo;
     |    ^
   8 | }
-  9 |"
+  9 |
+Cause: Missing semicolon. (7:3)"
 `;
 
 exports[`return.js format 1`] = `
@@ -417,7 +424,8 @@ exports[`satisfies.js [babel-flow] format 1`] = `
      |        ^
   33 |
   34 | abc satisfies mixed; // not a keyword
-  35 | }"
+  35 | }
+Cause: Unexpected token, expected "type" (32:7)"
 `;
 
 exports[`satisfies.js format 1`] = `
@@ -520,7 +528,8 @@ exports[`ternary.js [babel-flow] format 1`] = `
      |                                ^
   29 | }
   30 |
-  31 | bifornCringerMoshedPerplexSawder ="
+  31 | bifornCringerMoshedPerplexSawder =
+Cause: Unexpected token, expected "," (28:31)"
 `;
 
 exports[`ternary.js format 1`] = `

tests/format/flow/await/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`await-keywords.js [babel-flow] format 1`] = `
      |       ^
   13 | }
   14 |
-  15 | function foo(promise) { await (promise); }"
+  15 | function foo(promise) { await (promise); }
+Cause: 'await' is only allowed within async functions and at the top levels of modules. (12:6)"
 `;
 
 exports[`await-keywords.js format 1`] = `

tests/format/flow/conditional-types-comments/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`comments.js [babel-flow] format 1`] = `
     |            ^
   4 |   ? // comment
   5 |     foo
-  6 |   : bar;"
+  6 |   : bar;
+Cause: Unexpected token (3:11)"
 `;
 
 exports[`comments.js format 1`] = `

tests/format/flow/conditional-types/__snapshots__/jsfmt.spec.js.snap

@@ -4,7 +4,8 @@ exports[`comments-in-type-annotation.js [babel-flow] format 1`] = `
 "Unexpected token (1:24)
 > 1 | type A = () => infer R extends/* comment */ string
     |                        ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:23)"
 `;
 
 exports[`comments-in-type-annotation.js format 1`] = `
@@ -29,7 +30,8 @@ exports[`conditional-types.js [babel-flow] format 1`] = `
     |                                 ^
   4 |
   5 | interface DeepReadonlyArray<T> extends ReadonlyArray<DeepReadonly<T>> {}
-  6 |"
+  6 |
+Cause: Unexpected token (3:32)"
 `;
 
 exports[`conditional-types.js format 1`] = `
@@ -110,7 +112,8 @@ exports[`cursor.js [babel-flow] format 1`] = `
 "Unexpected token (1:24)
 > 1 | type A = () => infer R extends string
     |                        ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:23)"
 `;
 
 exports[`cursor.js format 1`] = `
@@ -136,7 +139,8 @@ exports[`infer-type.js [babel-flow] format 1`] = `
     |                       ^
   4 |
   5 | type Unpacked<T> =
-  6 |   T extends (infer U)[] ? U :"
+  6 |   T extends (infer U)[] ? U :
+Cause: Unexpected token, expected "," (3:22)"
 `;
 
 exports[`infer-type.js format 1`] = `
@@ -183,7 +187,8 @@ exports[`nested-in-condition.js [babel-flow] format 1`] = `
     |                          ^
   5 |   DoubleGobbledygookProvider
   6 |     ? UniqueDalgametreService
-  7 |     : CompositeZamazingoResolver;"
+  7 |     : CompositeZamazingoResolver;
+Cause: Unexpected token, expected ")" (4:25)"
 `;
 
 exports[`nested-in-condition.js format 1`] = `
@@ -254,7 +259,8 @@ exports[`new-ternary-spec.js [babel-flow] format 1`] = `
     |     ^
   6 |   : T extends number ? "number"
   7 |   : T extends boolean ? "boolean"
-  8 |   : T extends undefined ? "undefined""
+  8 |   : T extends undefined ? "undefined"
+Cause: Unexpected token (5:4)"
 `;
 
 exports[`new-ternary-spec.js format 1`] = `
@@ -314,7 +320,8 @@ exports[`parentheses.js [babel-flow] format 1`] = `
   3 | // #13275
 > 4 | type Foo<T> = T extends ((...a: any[]) => infer R extends string) ? R : never;
     |                 ^
-  5 |"
+  5 |
+Cause: Unexpected token (4:16)"
 `;
 
 exports[`parentheses.js format 1`] = `

tests/format/flow/declare-variable/__snapshots__/jsfmt.spec.js.snap

@@ -7,7 +7,8 @@ exports[`decare.js [babel-flow] format 1`] = `
     |         ^
   3 | declare const c: string;
   4 | declare export var a: string;
-  5 | declare export let b: string;"
+  5 | declare export let b: string;
+Cause: Unexpected token (2:8)"
 `;
 
 exports[`decare.js format 1`] = `

tests/format/flow/function-type-param/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`extends-bound.js [babel-flow] format 1`] = `
   2 |
 > 3 | type F = <T extends string>(t: T) => T;
     |             ^
-  4 |"
+  4 |
+Cause: Unexpected token, expected "," (3:12)"
 `;
 
 exports[`extends-bound.js format 1`] = `

tests/format/flow/jsx/__snapshots__/jsfmt.spec.js.snap

@@ -20,7 +20,8 @@ exports[`generic-component.js [babel-flow] format 1`] = `
     |                        ^
   2 |
   3 | const c2 = <MyComponent<number> />
-  4 |"
+  4 |
+Cause: Unexpected token (1:23)"
 `;
 
 exports[`generic-component.js format 1`] = `

tests/format/flow/mapped-types/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`comments.js [babel-flow] format 1`] = `
     |       ^
   4 | };
   5 |
-  6 | type Type = {"
+  6 | type Type = {
+Cause: Unexpected token, expected "]" (3:6)"
 `;
 
 exports[`comments.js [babel-ts] format 1`] = `
@@ -19,7 +20,8 @@ exports[`comments.js [babel-ts] format 1`] = `
     |   ^
   4 | };
   5 |
-  6 | type Type = {"
+  6 | type Type = {
+Cause: Unexpected token (3:2)"
 `;
 
 exports[`comments.js [typescript] format 1`] = `
@@ -30,7 +32,8 @@ exports[`comments.js [typescript] format 1`] = `
     |   ^
   4 | };
   5 |
-  6 | type Type = {"
+  6 | type Type = {
+Cause: Property or signature expected."
 `;
 
 exports[`comments.js format 1`] = `
@@ -132,7 +135,8 @@ exports[`mapped-types.js [babel-flow] format 1`] = `
     |                     ^
   4 | type MappedLong = {[key in keyof AReallyLongNameThatShouldReallyMostDefinitelyCauseALineWrap]: number};
   5 | type MappedWithVariance = {+[key in keyof O]: number};
-  6 | type MappedWithVarianceLong = {-[key in keyof AReallyLongNameThatShouldReallyMostDefinitelyCauseALineWrap]: number};"
+  6 | type MappedWithVarianceLong = {-[key in keyof AReallyLongNameThatShouldReallyMostDefinitelyCauseALineWrap]: number};
+Cause: Unexpected token, expected "]" (3:20)"
 `;
 
 exports[`mapped-types.js [babel-ts] format 1`] = `
@@ -143,7 +147,8 @@ exports[`mapped-types.js [babel-ts] format 1`] = `
     |                            ^
   6 | type MappedWithVarianceLong = {-[key in keyof AReallyLongNameThatShouldReallyMostDefinitelyCauseALineWrap]: number};
   7 | type MappedWithPlusOptional = {[key in keyof O]+?: number};
-  8 | type MappedWithMinusOptional = {[key in keyof O]-?: number};"
+  8 | type MappedWithMinusOptional = {[key in keyof O]-?: number};
+Cause: Unexpected token (5:27)"
 `;
 
 exports[`mapped-types.js [typescript] format 1`] = `
@@ -154,7 +159,8 @@ exports[`mapped-types.js [typescript] format 1`] = `
     |                            ^
   6 | type MappedWithVarianceLong = {-[key in keyof AReallyLongNameThatShouldReallyMostDefinitelyCauseALineWrap]: number};
   7 | type MappedWithPlusOptional = {[key in keyof O]+?: number};
-  8 | type MappedWithMinusOptional = {[key in keyof O]-?: number};"
+  8 | type MappedWithMinusOptional = {[key in keyof O]-?: number};
+Cause: Property or signature expected."
 `;
 
 exports[`mapped-types.js format 1`] = `
@@ -221,7 +227,8 @@ exports[`ts-compatibility.js [babel-flow] format 1`] = `
     |                   ^
   4 | type Test = {[key in keyof T]: number};
   5 | type Test = {[otherKeyName     in keyof T]: number};
-  6 | type Test = {[key in T]:number};"
+  6 | type Test = {[key in T]:number};
+Cause: Unexpected token, expected "]" (3:18)"
 `;
 
 exports[`ts-compatibility.js format 1`] = `

tests/format/flow/tuples/__snapshots__/jsfmt.spec.js.snap

@@ -4,7 +4,8 @@ exports[`labeled.js [babel-flow] format 1`] = `
 "Unexpected token, expected "," (1:12)
 > 1 | type T = [a: string, b: number];
     |            ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "," (1:11)"
 `;
 
 exports[`labeled.js format 1`] = `
@@ -27,7 +28,8 @@ exports[`optional.js [babel-flow] format 1`] = `
     |            ^
   2 |
   3 | // Unaffected
-  4 | type B = [?string, [?string], (?string) => boolean];"
+  4 | type B = [?string, [?string], (?string) => boolean];
+Cause: Unexpected token, expected "," (1:11)"
 `;
 
 exports[`optional.js format 1`] = `
@@ -54,7 +56,8 @@ exports[`variance.js [babel-flow] format 1`] = `
 "Unexpected token, expected "," (1:12)
 > 1 | type T = [a: string, +b: number, -c: boolean];
     |            ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "," (1:11)"
 `;
 
 exports[`variance.js format 1`] = `

tests/format/js/arrays/__snapshots__/jsfmt.spec.js.snap

@@ -1012,7 +1012,8 @@ exports[`tuple-and-record.js [acorn] format 1`] = `
      |    ^
    8 |   #[1,2],
    9 | ]
-  10 |"
+  10 |
+Cause: Unexpected character '[' (7:3)"
 `;
 
 exports[`tuple-and-record.js [espree] format 1`] = `
@@ -1023,7 +1024,8 @@ exports[`tuple-and-record.js [espree] format 1`] = `
      |    ^
    8 |   #[1,2],
    9 | ]
-  10 |"
+  10 |
+Cause: Unexpected character '['"
 `;
 
 exports[`tuple-and-record.js [flow] format 1`] = `
@@ -1045,7 +1047,8 @@ exports[`tuple-and-record.js [meriyah] format 1`] = `
      |   ^
    8 |   #[1,2],
    9 | ]
-  10 |"
+  10 |
+Cause: [7:3]: '#' not followed by identifier"
 `;
 
 exports[`tuple-and-record.js [typescript] format 1`] = `
@@ -1056,7 +1059,8 @@ exports[`tuple-and-record.js [typescript] format 1`] = `
      |   ^
    8 |   #[1,2],
    9 | ]
-  10 |"
+  10 |
+Cause: Invalid character."
 `;
 
 exports[`tuple-and-record.js format 1`] = `

tests/format/js/arrows-bind/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`arrows-bind.js [acorn] format 1`] = `
     |         ^
   2 | (a => b)::c;
   3 | a::(b => c);
-  4 |"
+  4 |
+Cause: Unexpected token (1:8)"
 `;
 
 exports[`arrows-bind.js [espree] format 1`] = `
@@ -15,7 +16,8 @@ exports[`arrows-bind.js [espree] format 1`] = `
     |         ^
   2 | (a => b)::c;
   3 | a::(b => c);
-  4 |"
+  4 |
+Cause: Unexpected token :"
 `;
 
 exports[`arrows-bind.js [meriyah] format 1`] = `
@@ -24,7 +26,8 @@ exports[`arrows-bind.js [meriyah] format 1`] = `
     |         ^
   2 | (a => b)::c;
   3 | a::(b => c);
-  4 |"
+  4 |
+Cause: [1:9]: Expected ')'"
 `;
 
 exports[`arrows-bind.js format 1`] = `

tests/format/js/arrows/__snapshots__/jsfmt.spec.js.snap

@@ -4548,7 +4548,8 @@ exports[`tuple-and-record.js - {"arrowParens":"always"} [acorn] format 1`] = `
     |       ^
   5 |   (#{ foo: bar, bar: baz, baz: foo });
   6 |
-  7 | map(() => (["
+  7 | map(() => ([
+Cause: Identifier 'fn12' has already been declared (4:6)"
 `;
 
 exports[`tuple-and-record.js - {"arrowParens":"always"} [espree] format 1`] = `
@@ -4559,7 +4560,8 @@ exports[`tuple-and-record.js - {"arrowParens":"always"} [espree] format 1`] = `
     |       ^
   5 |   (#{ foo: bar, bar: baz, baz: foo });
   6 |
-  7 | map(() => (["
+  7 | map(() => ([
+Cause: Identifier 'fn12' has already been declared"
 `;
 
 exports[`tuple-and-record.js - {"arrowParens":"always"} [meriyah] format 1`] = `
@@ -4570,7 +4572,8 @@ exports[`tuple-and-record.js - {"arrowParens":"always"} [meriyah] format 1`] = `
     |    ^
   6 |
   7 | map(() => ([
-  8 |   // comment"
+  8 |   // comment
+Cause: [5:4]: '#' not followed by identifier"
 `;
 
 exports[`tuple-and-record.js - {"arrowParens":"always"} [typescript] format 1`] = `
@@ -4581,7 +4584,8 @@ exports[`tuple-and-record.js - {"arrowParens":"always"} [typescript] format 1`]
     |    ^
   6 |
   7 | map(() => ([
-  8 |   // comment"
+  8 |   // comment
+Cause: Invalid character."
 `;
 
 exports[`tuple-and-record.js - {"arrowParens":"always"} format 1`] = `
@@ -4661,7 +4665,8 @@ exports[`tuple-and-record.js - {"arrowParens":"avoid"} [acorn] format 1`] = `
     |       ^
   5 |   (#{ foo: bar, bar: baz, baz: foo });
   6 |
-  7 | map(() => (["
+  7 | map(() => ([
+Cause: Identifier 'fn12' has already been declared (4:6)"
 `;
 
 exports[`tuple-and-record.js - {"arrowParens":"avoid"} [espree] format 1`] = `
@@ -4672,7 +4677,8 @@ exports[`tuple-and-record.js - {"arrowParens":"avoid"} [espree] format 1`] = `
     |       ^
   5 |   (#{ foo: bar, bar: baz, baz: foo });
   6 |
-  7 | map(() => (["
+  7 | map(() => ([
+Cause: Identifier 'fn12' has already been declared"
 `;
 
 exports[`tuple-and-record.js - {"arrowParens":"avoid"} [meriyah] format 1`] = `
@@ -4683,7 +4689,8 @@ exports[`tuple-and-record.js - {"arrowParens":"avoid"} [meriyah] format 1`] = `
     |    ^
   6 |
   7 | map(() => ([
-  8 |   // comment"
+  8 |   // comment
+Cause: [5:4]: '#' not followed by identifier"
 `;
 
 exports[`tuple-and-record.js - {"arrowParens":"avoid"} [typescript] format 1`] = `
@@ -4694,7 +4701,8 @@ exports[`tuple-and-record.js - {"arrowParens":"avoid"} [typescript] format 1`] =
     |    ^
   6 |
   7 | map(() => ([
-  8 |   // comment"
+  8 |   // comment
+Cause: Invalid character."
 `;
 
 exports[`tuple-and-record.js - {"arrowParens":"avoid"} format 1`] = `

tests/format/js/arrows/newline-before-arrow/__snapshots__/jsfmt.spec.js.snap

@@ -5,7 +5,8 @@ exports[`newline-before-arrow.js [acorn] format 1`] = `
   1 | async x
 > 2 | => x
     | ^
-  3 |"
+  3 |
+Cause: Unexpected token (2:0)"
 `;
 
 exports[`newline-before-arrow.js [espree] format 1`] = `
@@ -13,7 +14,8 @@ exports[`newline-before-arrow.js [espree] format 1`] = `
   1 | async x
 > 2 | => x
     | ^
-  3 |"
+  3 |
+Cause: Unexpected token =>"
 `;
 
 exports[`newline-before-arrow.js [meriyah] format 1`] = `
@@ -21,7 +23,8 @@ exports[`newline-before-arrow.js [meriyah] format 1`] = `
   1 | async x
 > 2 | => x
     |  ^
-  3 |"
+  3 |
+Cause: [2:2]: No line break is allowed after '=>'"
 `;
 
 exports[`newline-before-arrow.js format 1`] = `

tests/format/js/async-do-expressions/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`async-do-expressions.js [acorn] format 1`] = `
     |       ^
   2 |   1;
   3 | };
-  4 |"
+  4 |
+Cause: Unexpected token (1:6)"
 `;
 
 exports[`async-do-expressions.js [espree] format 1`] = `
@@ -15,7 +16,8 @@ exports[`async-do-expressions.js [espree] format 1`] = `
     |       ^
   2 |   1;
   3 | };
-  4 |"
+  4 |
+Cause: Unexpected token do"
 `;
 
 exports[`async-do-expressions.js [meriyah] format 1`] = `
@@ -24,7 +26,8 @@ exports[`async-do-expressions.js [meriyah] format 1`] = `
     |        ^
   2 |   1;
   3 | };
-  4 |"
+  4 |
+Cause: [1:8]: Unexpected token: 'do'"
 `;
 
 exports[`async-do-expressions.js format 1`] = `

tests/format/js/babel-plugins/__snapshots__/jsfmt.spec.js.snap

@@ -4,21 +4,24 @@ exports[`async-do-expressions.js [acorn] format 1`] = `
 "Unexpected token (1:7)
 > 1 | async do { await requestAPI().json() };
     |       ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:6)"
 `;
 
 exports[`async-do-expressions.js [espree] format 1`] = `
 "Unexpected token do (1:7)
 > 1 | async do { await requestAPI().json() };
     |       ^
-  2 |"
+  2 |
+Cause: Unexpected token do"
 `;
 
 exports[`async-do-expressions.js [meriyah] format 1`] = `
 "Unexpected token: 'do' (1:8)
 > 1 | async do { await requestAPI().json() };
     |        ^
-  2 |"
+  2 |
+Cause: [1:8]: Unexpected token: 'do'"
 `;
 
 exports[`async-do-expressions.js format 1`] = `
@@ -435,7 +438,8 @@ exports[`decimal.js [acorn] format 1`] = `
     |    ^
   4 | 9223372036854775807m;
   5 | 0.m;
-  6 | 3.1415926535897932m;"
+  6 | 3.1415926535897932m;
+Cause: Identifier directly after number (3:3)"
 `;
 
 exports[`decimal.js [espree] format 1`] = `
@@ -446,7 +450,8 @@ exports[`decimal.js [espree] format 1`] = `
     |    ^
   4 | 9223372036854775807m;
   5 | 0.m;
-  6 | 3.1415926535897932m;"
+  6 | 3.1415926535897932m;
+Cause: Identifier directly after number"
 `;
 
 exports[`decimal.js [meriyah] format 1`] = `
@@ -457,7 +462,8 @@ exports[`decimal.js [meriyah] format 1`] = `
     |   ^
   4 | 9223372036854775807m;
   5 | 0.m;
-  6 | 3.1415926535897932m;"
+  6 | 3.1415926535897932m;
+Cause: [3:3]: No identifiers allowed directly after numeric literal"
 `;
 
 exports[`decimal.js format 1`] = `
@@ -529,7 +535,8 @@ exports[`decorator-auto-accessors.js [acorn] format 1`] = `
 > 2 |   accessor clicked = false;
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:11)"
 `;
 
 exports[`decorator-auto-accessors.js [espree] format 1`] = `
@@ -538,7 +545,8 @@ exports[`decorator-auto-accessors.js [espree] format 1`] = `
 > 2 |   accessor clicked = false;
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token clicked"
 `;
 
 exports[`decorator-auto-accessors.js format 1`] = `
@@ -567,7 +575,8 @@ exports[`decorators.js [acorn] format 1`] = `
     | ^
   4 | class MyClass { }
   5 |
-  6 | function annotation(target) {"
+  6 | function annotation(target) {
+Cause: Unexpected character '@' (3:0)"
 `;
 
 exports[`decorators.js [espree] format 1`] = `
@@ -578,7 +587,8 @@ exports[`decorators.js [espree] format 1`] = `
     | ^
   4 | class MyClass { }
   5 |
-  6 | function annotation(target) {"
+  6 | function annotation(target) {
+Cause: Unexpected character '@'"
 `;
 
 exports[`decorators.js format 1`] = `
@@ -655,21 +665,24 @@ exports[`deferred-import-evaluation.js [acorn] format 1`] = `
 "Unexpected token (1:14)
 > 1 | import defer * as ns from "x";
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:13)"
 `;
 
 exports[`deferred-import-evaluation.js [espree] format 1`] = `
 "Unexpected token * (1:14)
 > 1 | import defer * as ns from "x";
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token *"
 `;
 
 exports[`deferred-import-evaluation.js [meriyah] format 1`] = `
 "Import source must be string (1:14)
 > 1 | import defer * as ns from "x";
     |              ^
-  2 |"
+  2 |
+Cause: [1:14]: Import source must be string"
 `;
 
 exports[`deferred-import-evaluation.js format 1`] = `
@@ -694,7 +707,8 @@ exports[`destructuring-private.js [acorn] format 1`] = `
     |             ^
   6 |     console.log(x); // => 1
   7 |   }
-  8 |   equals({ #x: otherX }) {"
+  8 |   equals({ #x: otherX }) {
+Cause: Unexpected token (5:12)"
 `;
 
 exports[`destructuring-private.js [espree] format 1`] = `
@@ -705,7 +719,8 @@ exports[`destructuring-private.js [espree] format 1`] = `
     |             ^
   6 |     console.log(x); // => 1
   7 |   }
-  8 |   equals({ #x: otherX }) {"
+  8 |   equals({ #x: otherX }) {
+Cause: Unexpected token #x"
 `;
 
 exports[`destructuring-private.js [meriyah] format 1`] = `
@@ -716,7 +731,8 @@ exports[`destructuring-private.js [meriyah] format 1`] = `
     |             ^
   6 |     console.log(x); // => 1
   7 |   }
-  8 |   equals({ #x: otherX }) {"
+  8 |   equals({ #x: otherX }) {
+Cause: [5:13]: Unexpected token: 'PrivateField'"
 `;
 
 exports[`destructuring-private.js format 1`] = `
@@ -763,7 +779,8 @@ exports[`do-expressions.js [acorn] format 1`] = `
     |         ^
   4 |   if(x > 10) {
   5 |     'big';
-  6 |   } else {"
+  6 |   } else {
+Cause: Unexpected token (3:8)"
 `;
 
 exports[`do-expressions.js [espree] format 1`] = `
@@ -774,7 +791,8 @@ exports[`do-expressions.js [espree] format 1`] = `
     |         ^
   4 |   if(x > 10) {
   5 |     'big';
-  6 |   } else {"
+  6 |   } else {
+Cause: Unexpected token do"
 `;
 
 exports[`do-expressions.js [meriyah] format 1`] = `
@@ -785,7 +803,8 @@ exports[`do-expressions.js [meriyah] format 1`] = `
     |          ^
   4 |   if(x > 10) {
   5 |     'big';
-  6 |   } else {"
+  6 |   } else {
+Cause: [3:10]: Unexpected token: 'do'"
 `;
 
 exports[`do-expressions.js format 1`] = `
@@ -857,7 +876,8 @@ exports[`explicit-resource-management.js [acorn] format 1`] = `
     |         ^
   3 | } // cleanup
   4 |
-  5 | {"
+  5 | {
+Cause: Unexpected token (2:8)"
 `;
 
 exports[`explicit-resource-management.js [espree] format 1`] = `
@@ -867,7 +887,8 @@ exports[`explicit-resource-management.js [espree] format 1`] = `
     |         ^
   3 | } // cleanup
   4 |
-  5 | {"
+  5 | {
+Cause: Unexpected token handle"
 `;
 
 exports[`explicit-resource-management.js [meriyah] format 1`] = `
@@ -877,7 +898,8 @@ exports[`explicit-resource-management.js [meriyah] format 1`] = `
     |              ^
   3 | } // cleanup
   4 |
-  5 | {"
+  5 | {
+Cause: [2:14]: Unexpected token: 'identifier'"
 `;
 
 exports[`explicit-resource-management.js format 1`] = `
@@ -922,7 +944,8 @@ exports[`export-default-from.js [acorn] format 1`] = `
   3 |
 > 4 | export v from 'mod';
     |        ^
-  5 |"
+  5 |
+Cause: Unexpected token (4:7)"
 `;
 
 exports[`export-default-from.js [espree] format 1`] = `
@@ -931,7 +954,8 @@ exports[`export-default-from.js [espree] format 1`] = `
   3 |
 > 4 | export v from 'mod';
     |        ^
-  5 |"
+  5 |
+Cause: Unexpected token v"
 `;
 
 exports[`export-default-from.js [meriyah] format 1`] = `
@@ -940,7 +964,8 @@ exports[`export-default-from.js [meriyah] format 1`] = `
   3 |
 > 4 | export v from 'mod';
     |        ^
-  5 |"
+  5 |
+Cause: [4:8]: Unexpected token: 'identifier'"
 `;
 
 exports[`export-default-from.js format 1`] = `
@@ -986,7 +1011,8 @@ exports[`flow.js [__babel_estree] format 1`] = `
   2 |
 > 3 | function foo(one: any, two: number, three?): string {}
     |                 ^
-  4 |"
+  4 |
+Cause: Unexpected token, expected "," (3:16)"
 `;
 
 exports[`flow.js [acorn] format 1`] = `
@@ -995,7 +1021,8 @@ exports[`flow.js [acorn] format 1`] = `
   2 |
 > 3 | function foo(one: any, two: number, three?): string {}
     |                 ^
-  4 |"
+  4 |
+Cause: Unexpected token (3:16)"
 `;
 
 exports[`flow.js [babel] format 1`] = `
@@ -1004,7 +1031,8 @@ exports[`flow.js [babel] format 1`] = `
   2 |
 > 3 | function foo(one: any, two: number, three?): string {}
     |                 ^
-  4 |"
+  4 |
+Cause: Unexpected token, expected "," (3:16)"
 `;
 
 exports[`flow.js [babel-flow] format 1`] = `
@@ -1049,7 +1077,8 @@ exports[`flow.js [espree] format 1`] = `
   2 |
 > 3 | function foo(one: any, two: number, three?): string {}
     |                 ^
-  4 |"
+  4 |
+Cause: Unexpected token :"
 `;
 
 exports[`flow.js [meriyah] format 1`] = `
@@ -1058,7 +1087,8 @@ exports[`flow.js [meriyah] format 1`] = `
   2 |
 > 3 | function foo(one: any, two: number, three?): string {}
     |                 ^
-  4 |"
+  4 |
+Cause: [3:17]: Expected ')'"
 `;
 
 exports[`function-bind.js [acorn] format 1`] = `
@@ -1069,7 +1099,8 @@ exports[`function-bind.js [acorn] format 1`] = `
     |     ^
   4 | // is equivalent to:
   5 | func.bind(obj)
-  6 |"
+  6 |
+Cause: Unexpected token (3:4)"
 `;
 
 exports[`function-bind.js [espree] format 1`] = `
@@ -1080,7 +1111,8 @@ exports[`function-bind.js [espree] format 1`] = `
     |     ^
   4 | // is equivalent to:
   5 | func.bind(obj)
-  6 |"
+  6 |
+Cause: Unexpected token :"
 `;
 
 exports[`function-bind.js [meriyah] format 1`] = `
@@ -1091,7 +1123,8 @@ exports[`function-bind.js [meriyah] format 1`] = `
     |     ^
   4 | // is equivalent to:
   5 | func.bind(obj)
-  6 |"
+  6 |
+Cause: [3:5]: Unexpected token: ':'"
 `;
 
 exports[`function-bind.js format 1`] = `
@@ -1147,7 +1180,8 @@ exports[`function-sent.js [acorn] format 1`] = `
     |                                 ^
   5 |     console.log("Yield", yield);
   6 | }
-  7 |"
+  7 |
+Cause: Unexpected token (4:32)"
 `;
 
 exports[`function-sent.js [espree] format 1`] = `
@@ -1158,7 +1192,8 @@ exports[`function-sent.js [espree] format 1`] = `
     |                                 ^
   5 |     console.log("Yield", yield);
   6 | }
-  7 |"
+  7 |
+Cause: Unexpected token ."
 `;
 
 exports[`function-sent.js [meriyah] format 1`] = `
@@ -1169,7 +1204,8 @@ exports[`function-sent.js [meriyah] format 1`] = `
     |                                 ^
   5 |     console.log("Yield", yield);
   6 | }
-  7 |"
+  7 |
+Cause: [4:33]: Expected '('"
 `;
 
 exports[`function-sent.js format 1`] = `
@@ -1208,21 +1244,24 @@ exports[`import-assertions-dynamic.js [acorn] format 1`] = `
 "Unexpected token (1:20)
 > 1 | import("./foo.json", { assert: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:19)"
 `;
 
 exports[`import-assertions-dynamic.js [espree] format 1`] = `
 "Unexpected token , (1:20)
 > 1 | import("./foo.json", { assert: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token ,"
 `;
 
 exports[`import-assertions-dynamic.js [meriyah] format 1`] = `
 "Expected ')' (1:20)
 > 1 | import("./foo.json", { assert: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: [1:20]: Expected ')'"
 `;
 
 exports[`import-assertions-dynamic.js format 1`] = `
@@ -1243,21 +1282,24 @@ exports[`import-assertions-static.js [acorn] format 1`] = `
 "Unexpected token (1:31)
 > 1 | import json from "./foo.json" assert { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:30)"
 `;
 
 exports[`import-assertions-static.js [espree] format 1`] = `
 "Unexpected token assert (1:31)
 > 1 | import json from "./foo.json" assert { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token assert"
 `;
 
 exports[`import-assertions-static.js [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:36)
 > 1 | import json from "./foo.json" assert { type: "json" };
     |                                    ^
-  2 |"
+  2 |
+Cause: [1:36]: Unexpected token: 'identifier'"
 `;
 
 exports[`import-assertions-static.js format 1`] = `
@@ -1278,21 +1320,24 @@ exports[`import-attributes-dynamic.js [acorn] format 1`] = `
 "Unexpected token (1:20)
 > 1 | import("./foo.json", { with: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:19)"
 `;
 
 exports[`import-attributes-dynamic.js [espree] format 1`] = `
 "Unexpected token , (1:20)
 > 1 | import("./foo.json", { with: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token ,"
 `;
 
 exports[`import-attributes-dynamic.js [meriyah] format 1`] = `
 "Expected ')' (1:20)
 > 1 | import("./foo.json", { with: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: [1:20]: Expected ')'"
 `;
 
 exports[`import-attributes-dynamic.js format 1`] = `
@@ -1313,21 +1358,24 @@ exports[`import-attributes-static.js [acorn] format 1`] = `
 "Unexpected token (1:31)
 > 1 | import json from "./foo.json" with { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:30)"
 `;
 
 exports[`import-attributes-static.js [espree] format 1`] = `
 "Unexpected token with (1:31)
 > 1 | import json from "./foo.json" with { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token with"
 `;
 
 exports[`import-attributes-static.js [meriyah] format 1`] = `
 "Unexpected token: 'with' (1:34)
 > 1 | import json from "./foo.json" with { type: "json" };
     |                                  ^
-  2 |"
+  2 |
+Cause: [1:34]: Unexpected token: 'with'"
 `;
 
 exports[`import-attributes-static.js format 1`] = `
@@ -1396,21 +1444,24 @@ exports[`import-reflection.js [acorn] format 1`] = `
 "Unexpected token (1:15)
 > 1 | import module foo from "./module.wasm";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`import-reflection.js [espree] format 1`] = `
 "Unexpected token foo (1:15)
 > 1 | import module foo from "./module.wasm";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token foo"
 `;
 
 exports[`import-reflection.js [meriyah] format 1`] = `
 "Import source must be string (1:17)
 > 1 | import module foo from "./module.wasm";
     |                 ^
-  2 |"
+  2 |
+Cause: [1:17]: Import source must be string"
 `;
 
 exports[`import-reflection.js format 1`] = `
@@ -1485,7 +1536,8 @@ exports[`module-blocks.js [acorn] format 1`] = `
     |                ^
   2 |   export let m = 2;
   3 |   export let n = 3;
-  4 | };"
+  4 | };
+Cause: Unexpected token (1:15)"
 `;
 
 exports[`module-blocks.js [espree] format 1`] = `
@@ -1494,7 +1546,8 @@ exports[`module-blocks.js [espree] format 1`] = `
     |                ^
   2 |   export let m = 2;
   3 |   export let n = 3;
-  4 | };"
+  4 | };
+Cause: Unexpected token {"
 `;
 
 exports[`module-blocks.js [meriyah] format 1`] = `
@@ -1503,7 +1556,8 @@ exports[`module-blocks.js [meriyah] format 1`] = `
     |                ^
   2 |   export let m = 2;
   3 |   export let n = 3;
-  4 | };"
+  4 | };
+Cause: [1:16]: Unexpected token: '{'"
 `;
 
 exports[`module-blocks.js format 1`] = `
@@ -1531,7 +1585,8 @@ exports[`module-string-names.js [meriyah] format 1`] = `
 > 1 | import { "😄" as smile } from "./emojis.js";
     |             ^
   2 | export { smile as "😄" } from "./emojis.js";
-  3 |"
+  3 |
+Cause: [1:13]: Expected '}'"
 `;
 
 exports[`module-string-names.js format 1`] = `
@@ -1863,21 +1918,24 @@ exports[`optional-chaining-assignment.js [acorn] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:1)
 > 1 | maybeAnObj?.prop = theValue;
     | ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side (1:0)"
 `;
 
 exports[`optional-chaining-assignment.js [espree] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:1)
 > 1 | maybeAnObj?.prop = theValue;
     | ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side"
 `;
 
 exports[`optional-chaining-assignment.js [meriyah] format 1`] = `
 "Invalid left-hand side in assignment (1:18)
 > 1 | maybeAnObj?.prop = theValue;
     |                  ^
-  2 |"
+  2 |
+Cause: [1:18]: Invalid left-hand side in assignment"
 `;
 
 exports[`optional-chaining-assignment.js format 1`] = `
@@ -1902,7 +1960,8 @@ exports[`partial-application.js [acorn] format 1`] = `
     |                       ^
   6 | addOne(2); // 3
   7 |
-  8 | const addTen = add(?, 10); // apply from the right"
+  8 | const addTen = add(?, 10); // apply from the right
+Cause: Unexpected token (5:22)"
 `;
 
 exports[`partial-application.js [espree] format 1`] = `
@@ -1913,7 +1972,8 @@ exports[`partial-application.js [espree] format 1`] = `
     |                       ^
   6 | addOne(2); // 3
   7 |
-  8 | const addTen = add(?, 10); // apply from the right"
+  8 | const addTen = add(?, 10); // apply from the right
+Cause: Unexpected token ?"
 `;
 
 exports[`partial-application.js [meriyah] format 1`] = `
@@ -1924,7 +1984,8 @@ exports[`partial-application.js [meriyah] format 1`] = `
     |                       ^
   6 | addOne(2); // 3
   7 |
-  8 | const addTen = add(?, 10); // apply from the right"
+  8 | const addTen = add(?, 10); // apply from the right
+Cause: [5:23]: Unexpected token: '?'"
 `;
 
 exports[`partial-application.js format 1`] = `
@@ -1989,7 +2050,8 @@ exports[`pipeline-operator-fsharp.js [acorn] format 1`] = `
     |    ^
   6 |   |> x => doubleSay(x, ', ')
   7 |   |> capitalize
-  8 |   |> x => x + '!'"
+  8 |   |> x => x + '!'
+Cause: Unexpected token (5:3)"
 `;
 
 exports[`pipeline-operator-fsharp.js [espree] format 1`] = `
@@ -2000,7 +2062,8 @@ exports[`pipeline-operator-fsharp.js [espree] format 1`] = `
     |    ^
   6 |   |> x => doubleSay(x, ', ')
   7 |   |> capitalize
-  8 |   |> x => x + '!'"
+  8 |   |> x => x + '!'
+Cause: Unexpected token >"
 `;
 
 exports[`pipeline-operator-fsharp.js [meriyah] format 1`] = `
@@ -2011,7 +2074,8 @@ exports[`pipeline-operator-fsharp.js [meriyah] format 1`] = `
     |    ^
   6 |   |> x => doubleSay(x, ', ')
   7 |   |> capitalize
-  8 |   |> x => x + '!'"
+  8 |   |> x => x + '!'
+Cause: [5:4]: Unexpected token: '>'"
 `;
 
 exports[`pipeline-operator-fsharp.js format 1`] = `
@@ -2097,7 +2161,8 @@ exports[`pipeline-operator-hack.js [acorn] format 1`] = `
     |   ^
   6 |  |> equals(%, prefix);
   7 |
-  8 | // (The % token isn't final; it might instead be @ or ? or #.)"
+  8 | // (The % token isn't final; it might instead be @ or ? or #.)
+Cause: Unexpected token (5:2)"
 `;
 
 exports[`pipeline-operator-hack.js [espree] format 1`] = `
@@ -2108,7 +2173,8 @@ exports[`pipeline-operator-hack.js [espree] format 1`] = `
     |   ^
   6 |  |> equals(%, prefix);
   7 |
-  8 | // (The % token isn't final; it might instead be @ or ? or #.)"
+  8 | // (The % token isn't final; it might instead be @ or ? or #.)
+Cause: Unexpected token >"
 `;
 
 exports[`pipeline-operator-hack.js [meriyah] format 1`] = `
@@ -2119,7 +2185,8 @@ exports[`pipeline-operator-hack.js [meriyah] format 1`] = `
     |   ^
   6 |  |> equals(%, prefix);
   7 |
-  8 | // (The % token isn't final; it might instead be @ or ? or #.)"
+  8 | // (The % token isn't final; it might instead be @ or ? or #.)
+Cause: [5:3]: Unexpected token: '>'"
 `;
 
 exports[`pipeline-operator-hack.js format 1`] = `
@@ -2156,7 +2223,8 @@ exports[`pipeline-operator-minimal.js [acorn] format 1`] = `
      |     ^
    8 |   |> doubleSay
    9 |   |> capitalize
-  10 |   |> exclaim;"
+  10 |   |> exclaim;
+Cause: Identifier 'result' has already been declared (7:4)"
 `;
 
 exports[`pipeline-operator-minimal.js [espree] format 1`] = `
@@ -2167,7 +2235,8 @@ exports[`pipeline-operator-minimal.js [espree] format 1`] = `
      |     ^
    8 |   |> doubleSay
    9 |   |> capitalize
-  10 |   |> exclaim;"
+  10 |   |> exclaim;
+Cause: Identifier 'result' has already been declared"
 `;
 
 exports[`pipeline-operator-minimal.js [meriyah] format 1`] = `
@@ -2178,7 +2247,8 @@ exports[`pipeline-operator-minimal.js [meriyah] format 1`] = `
      |    ^
    9 |   |> capitalize
   10 |   |> exclaim;
-  11 |"
+  11 |
+Cause: [8:4]: Unexpected token: '>'"
 `;
 
 exports[`pipeline-operator-minimal.js format 1`] = `
@@ -2393,7 +2463,8 @@ exports[`record-tuple-record.js [acorn] format 1`] = `
     |                  ^
   2 |     a: 1,
   3 |     b: 2,
-  4 |     c: 3,"
+  4 |     c: 3,
+Cause: Unexpected character '{' (1:17)"
 `;
 
 exports[`record-tuple-record.js [espree] format 1`] = `
@@ -2402,7 +2473,8 @@ exports[`record-tuple-record.js [espree] format 1`] = `
     |                  ^
   2 |     a: 1,
   3 |     b: 2,
-  4 |     c: 3,"
+  4 |     c: 3,
+Cause: Unexpected character '{'"
 `;
 
 exports[`record-tuple-record.js [meriyah] format 1`] = `
@@ -2411,7 +2483,8 @@ exports[`record-tuple-record.js [meriyah] format 1`] = `
     |                 ^
   2 |     a: 1,
   3 |     b: 2,
-  4 |     c: 3,"
+  4 |     c: 3,
+Cause: [1:17]: '#' not followed by identifier"
 `;
 
 exports[`record-tuple-record.js format 1`] = `
@@ -2444,21 +2517,24 @@ exports[`record-tuple-tuple.js [acorn] format 1`] = `
 "Unexpected character '[' (1:17)
 > 1 | const tuple1 = #[1, 2, 3];
     |                 ^
-  2 |"
+  2 |
+Cause: Unexpected character '[' (1:16)"
 `;
 
 exports[`record-tuple-tuple.js [espree] format 1`] = `
 "Unexpected character '[' (1:17)
 > 1 | const tuple1 = #[1, 2, 3];
     |                 ^
-  2 |"
+  2 |
+Cause: Unexpected character '['"
 `;
 
 exports[`record-tuple-tuple.js [meriyah] format 1`] = `
 "'#' not followed by identifier (1:16)
 > 1 | const tuple1 = #[1, 2, 3];
     |                ^
-  2 |"
+  2 |
+Cause: [1:16]: '#' not followed by identifier"
 `;
 
 exports[`record-tuple-tuple.js format 1`] = `
@@ -2479,7 +2555,8 @@ exports[`regex-v-flag.js [meriyah] format 1`] = `
 "Unexpected regular expression flag (1:3)
 > 1 | /a/v;
     |   ^
-  2 |"
+  2 |
+Cause: [1:3]: Unexpected regular expression flag"
 `;
 
 exports[`regex-v-flag.js format 1`] = `
@@ -2500,21 +2577,24 @@ exports[`regexp-modifiers.js [acorn] format 1`] = `
 "Invalid regular expression: /^(?i:[a-z])[a-z]$/: Invalid group (1:13)
 > 1 | const re = /^(?i:[a-z])[a-z]$/;
     |             ^
-  2 |"
+  2 |
+Cause: Invalid regular expression: /^(?i:[a-z])[a-z]$/: Invalid group (1:12)"
 `;
 
 exports[`regexp-modifiers.js [espree] format 1`] = `
 "Invalid regular expression: /^(?i:[a-z])[a-z]$/: Invalid group (1:13)
 > 1 | const re = /^(?i:[a-z])[a-z]$/;
     |             ^
-  2 |"
+  2 |
+Cause: Invalid regular expression: /^(?i:[a-z])[a-z]$/: Invalid group"
 `;
 
 exports[`regexp-modifiers.js [meriyah] format 1`] = `
 "Unterminated regular expression (1:30)
 > 1 | const re = /^(?i:[a-z])[a-z]$/;
     |                              ^
-  2 |"
+  2 |
+Cause: [1:30]: Unterminated regular expression"
 `;
 
 exports[`regexp-modifiers.js format 1`] = `
@@ -2536,7 +2616,8 @@ exports[`source-phase-imports.js [acorn] format 1`] = `
 > 1 | import source fooSource from "foo";
     |               ^
   2 | import.source("x");
-  3 |"
+  3 |
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`source-phase-imports.js [espree] format 1`] = `
@@ -2544,7 +2625,8 @@ exports[`source-phase-imports.js [espree] format 1`] = `
 > 1 | import source fooSource from "foo";
     |               ^
   2 | import.source("x");
-  3 |"
+  3 |
+Cause: Unexpected token fooSource"
 `;
 
 exports[`source-phase-imports.js [meriyah] format 1`] = `
@@ -2552,7 +2634,8 @@ exports[`source-phase-imports.js [meriyah] format 1`] = `
 > 1 | import source fooSource from "foo";
     |                       ^
   2 | import.source("x");
-  3 |"
+  3 |
+Cause: [1:23]: Import source must be string"
 `;
 
 exports[`source-phase-imports.js format 1`] = `
@@ -2579,7 +2662,8 @@ exports[`throw-expressions.js [acorn] format 1`] = `
     |                       ^
   4 |   const test = param === true || throw new Error('Falsy!');
   5 | }
-  6 |"
+  6 |
+Cause: Unexpected token (3:22)"
 `;
 
 exports[`throw-expressions.js [espree] format 1`] = `
@@ -2590,7 +2674,8 @@ exports[`throw-expressions.js [espree] format 1`] = `
     |                       ^
   4 |   const test = param === true || throw new Error('Falsy!');
   5 | }
-  6 |"
+  6 |
+Cause: Unexpected token throw"
 `;
 
 exports[`throw-expressions.js [meriyah] format 1`] = `
@@ -2601,7 +2686,8 @@ exports[`throw-expressions.js [meriyah] format 1`] = `
     |                           ^
   4 |   const test = param === true || throw new Error('Falsy!');
   5 | }
-  6 |"
+  6 |
+Cause: [3:27]: Unexpected token: 'throw'"
 `;
 
 exports[`throw-expressions.js format 1`] = `
@@ -2632,7 +2718,8 @@ exports[`typescript.js [__babel_estree] format 1`] = `
   2 |
 > 3 | const x: number = 0;
     |        ^
-  4 |"
+  4 |
+Cause: Unexpected token (3:7)"
 `;
 
 exports[`typescript.js [acorn] format 1`] = `
@@ -2641,7 +2728,8 @@ exports[`typescript.js [acorn] format 1`] = `
   2 |
 > 3 | const x: number = 0;
     |        ^
-  4 |"
+  4 |
+Cause: Unexpected token (3:7)"
 `;
 
 exports[`typescript.js [babel] format 1`] = `
@@ -2650,7 +2738,8 @@ exports[`typescript.js [babel] format 1`] = `
   2 |
 > 3 | const x: number = 0;
     |        ^
-  4 |"
+  4 |
+Cause: Unexpected token (3:7)"
 `;
 
 exports[`typescript.js [babel-flow] format 1`] = `
@@ -2695,7 +2784,8 @@ exports[`typescript.js [espree] format 1`] = `
   2 |
 > 3 | const x: number = 0;
     |        ^
-  4 |"
+  4 |
+Cause: Unexpected token :"
 `;
 
 exports[`typescript.js [meriyah] format 1`] = `
@@ -2704,7 +2794,8 @@ exports[`typescript.js [meriyah] format 1`] = `
   2 |
 > 3 | const x: number = 0;
     |        ^
-  4 |"
+  4 |
+Cause: [3:8]: Missing initializer in const declaration"
 `;
 
 exports[`v8intrinsic.js [acorn] format 1`] = `
@@ -2715,7 +2806,8 @@ exports[`v8intrinsic.js [acorn] format 1`] = `
     | ^
   4 |
   5 |
-  6 | // Invalid code https://github.com/JLHwung/babel/blob/c1a3cbfd65e08b7013fd6f8c62add8cb10b4b169/packages/babel-parser/test/fixtures/v8intrinsic/_errors/in-bind-expression/options.json"
+  6 | // Invalid code https://github.com/JLHwung/babel/blob/c1a3cbfd65e08b7013fd6f8c62add8cb10b4b169/packages/babel-parser/test/fixtures/v8intrinsic/_errors/in-bind-expression/options.json
+Cause: Unexpected token (3:0)"
 `;
 
 exports[`v8intrinsic.js [espree] format 1`] = `
@@ -2726,7 +2818,8 @@ exports[`v8intrinsic.js [espree] format 1`] = `
     | ^
   4 |
   5 |
-  6 | // Invalid code https://github.com/JLHwung/babel/blob/c1a3cbfd65e08b7013fd6f8c62add8cb10b4b169/packages/babel-parser/test/fixtures/v8intrinsic/_errors/in-bind-expression/options.json"
+  6 | // Invalid code https://github.com/JLHwung/babel/blob/c1a3cbfd65e08b7013fd6f8c62add8cb10b4b169/packages/babel-parser/test/fixtures/v8intrinsic/_errors/in-bind-expression/options.json
+Cause: Unexpected token %"
 `;
 
 exports[`v8intrinsic.js [meriyah] format 1`] = `
@@ -2737,7 +2830,8 @@ exports[`v8intrinsic.js [meriyah] format 1`] = `
     | ^
   4 |
   5 |
-  6 | // Invalid code https://github.com/JLHwung/babel/blob/c1a3cbfd65e08b7013fd6f8c62add8cb10b4b169/packages/babel-parser/test/fixtures/v8intrinsic/_errors/in-bind-expression/options.json"
+  6 | // Invalid code https://github.com/JLHwung/babel/blob/c1a3cbfd65e08b7013fd6f8c62add8cb10b4b169/packages/babel-parser/test/fixtures/v8intrinsic/_errors/in-bind-expression/options.json
+Cause: [3:1]: Unexpected token: '%'"
 `;
 
 exports[`v8intrinsic.js format 1`] = `

tests/format/js/binary-expressions/__snapshots__/jsfmt.spec.js.snap

@@ -1159,7 +1159,8 @@ exports[`tuple-and-record.js [acorn] format 1`] = `
     |               ^
   7 |   // comment
   8 |   a,
-  9 | ]"
+  9 | ]
+Cause: Unexpected character '[' (6:14)"
 `;
 
 exports[`tuple-and-record.js [espree] format 1`] = `
@@ -1170,7 +1171,8 @@ exports[`tuple-and-record.js [espree] format 1`] = `
     |               ^
   7 |   // comment
   8 |   a,
-  9 | ]"
+  9 | ]
+Cause: Unexpected character '['"
 `;
 
 exports[`tuple-and-record.js [flow] format 1`] = `
@@ -1192,7 +1194,8 @@ exports[`tuple-and-record.js [meriyah] format 1`] = `
     |              ^
   7 |   // comment
   8 |   a,
-  9 | ]"
+  9 | ]
+Cause: [6:14]: '#' not followed by identifier"
 `;
 
 exports[`tuple-and-record.js [typescript] format 1`] = `
@@ -1203,7 +1206,8 @@ exports[`tuple-and-record.js [typescript] format 1`] = `
     |              ^
   7 |   // comment
   8 |   a,
-  9 | ]"
+  9 | ]
+Cause: Invalid character."
 `;
 
 exports[`tuple-and-record.js format 1`] = `

tests/format/js/bind-expressions/__snapshots__/jsfmt.spec.js.snap

@@ -7,7 +7,8 @@ exports[`await.js [acorn] format 1`] = `
 > 3 |     return (await request)::doSyncThing();
     |                           ^
   4 | };
-  5 |"
+  5 |
+Cause: Unexpected token (3:26)"
 `;
 
 exports[`await.js [espree] format 1`] = `
@@ -17,7 +18,8 @@ exports[`await.js [espree] format 1`] = `
 > 3 |     return (await request)::doSyncThing();
     |                           ^
   4 | };
-  5 |"
+  5 |
+Cause: Unexpected token :"
 `;
 
 exports[`await.js [meriyah] format 1`] = `
@@ -27,7 +29,8 @@ exports[`await.js [meriyah] format 1`] = `
 > 3 |     return (await request)::doSyncThing();
     |                           ^
   4 | };
-  5 |"
+  5 |
+Cause: [3:27]: Unexpected token: ':'"
 `;
 
 exports[`await.js - {"semi":false} [acorn] format 1`] = `
@@ -37,7 +40,8 @@ exports[`await.js - {"semi":false} [acorn] format 1`] = `
 > 3 |     return (await request)::doSyncThing();
     |                           ^
   4 | };
-  5 |"
+  5 |
+Cause: Unexpected token (3:26)"
 `;
 
 exports[`await.js - {"semi":false} [espree] format 1`] = `
@@ -47,7 +51,8 @@ exports[`await.js - {"semi":false} [espree] format 1`] = `
 > 3 |     return (await request)::doSyncThing();
     |                           ^
   4 | };
-  5 |"
+  5 |
+Cause: Unexpected token :"
 `;
 
 exports[`await.js - {"semi":false} [meriyah] format 1`] = `
@@ -57,7 +62,8 @@ exports[`await.js - {"semi":false} [meriyah] format 1`] = `
 > 3 |     return (await request)::doSyncThing();
     |                           ^
   4 | };
-  5 |"
+  5 |
+Cause: [3:27]: Unexpected token: ':'"
 `;
 
 exports[`await.js - {"semi":false} format 1`] = `
@@ -107,7 +113,8 @@ exports[`bind_parens.js [acorn] format 1`] = `
     |         ^
   2 | a || (b::c);
   3 | ::obj.prop;
-  4 | (void 0)::func();"
+  4 | (void 0)::func();
+Cause: Unexpected token (1:8)"
 `;
 
 exports[`bind_parens.js [espree] format 1`] = `
@@ -116,7 +123,8 @@ exports[`bind_parens.js [espree] format 1`] = `
     |         ^
   2 | a || (b::c);
   3 | ::obj.prop;
-  4 | (void 0)::func();"
+  4 | (void 0)::func();
+Cause: Unexpected token :"
 `;
 
 exports[`bind_parens.js [meriyah] format 1`] = `
@@ -125,7 +133,8 @@ exports[`bind_parens.js [meriyah] format 1`] = `
     |         ^
   2 | a || (b::c);
   3 | ::obj.prop;
-  4 | (void 0)::func();"
+  4 | (void 0)::func();
+Cause: [1:9]: Unexpected token: ':'"
 `;
 
 exports[`bind_parens.js - {"semi":false} [acorn] format 1`] = `
@@ -134,7 +143,8 @@ exports[`bind_parens.js - {"semi":false} [acorn] format 1`] = `
     |         ^
   2 | a || (b::c);
   3 | ::obj.prop;
-  4 | (void 0)::func();"
+  4 | (void 0)::func();
+Cause: Unexpected token (1:8)"
 `;
 
 exports[`bind_parens.js - {"semi":false} [espree] format 1`] = `
@@ -143,7 +153,8 @@ exports[`bind_parens.js - {"semi":false} [espree] format 1`] = `
     |         ^
   2 | a || (b::c);
   3 | ::obj.prop;
-  4 | (void 0)::func();"
+  4 | (void 0)::func();
+Cause: Unexpected token :"
 `;
 
 exports[`bind_parens.js - {"semi":false} [meriyah] format 1`] = `
@@ -152,7 +163,8 @@ exports[`bind_parens.js - {"semi":false} [meriyah] format 1`] = `
     |         ^
   2 | a || (b::c);
   3 | ::obj.prop;
-  4 | (void 0)::func();"
+  4 | (void 0)::func();
+Cause: [1:9]: Unexpected token: ':'"
 `;
 
 exports[`bind_parens.js - {"semi":false} format 1`] = `
@@ -324,7 +336,8 @@ exports[`long_name_method.js [acorn] format 1`] = `
     |                                                      ^
   4 |   }
   5 |   
-  6 |   testLongNameMethodAndSomethingElseLallala() {"
+  6 |   testLongNameMethodAndSomethingElseLallala() {
+Cause: Unexpected token (3:53)"
 `;
 
 exports[`long_name_method.js [espree] format 1`] = `
@@ -335,7 +348,8 @@ exports[`long_name_method.js [espree] format 1`] = `
     |                                                      ^
   4 |   }
   5 |   
-  6 |   testLongNameMethodAndSomethingElseLallala() {"
+  6 |   testLongNameMethodAndSomethingElseLallala() {
+Cause: Unexpected token :"
 `;
 
 exports[`long_name_method.js [meriyah] format 1`] = `
@@ -346,7 +360,8 @@ exports[`long_name_method.js [meriyah] format 1`] = `
     |                                                      ^
   4 |   }
   5 |   
-  6 |   testLongNameMethodAndSomethingElseLallala() {"
+  6 |   testLongNameMethodAndSomethingElseLallala() {
+Cause: [3:54]: Unexpected token: ':'"
 `;
 
 exports[`long_name_method.js - {"semi":false} [acorn] format 1`] = `
@@ -357,7 +372,8 @@ exports[`long_name_method.js - {"semi":false} [acorn] format 1`] = `
     |                                                      ^
   4 |   }
   5 |   
-  6 |   testLongNameMethodAndSomethingElseLallala() {"
+  6 |   testLongNameMethodAndSomethingElseLallala() {
+Cause: Unexpected token (3:53)"
 `;
 
 exports[`long_name_method.js - {"semi":false} [espree] format 1`] = `
@@ -368,7 +384,8 @@ exports[`long_name_method.js - {"semi":false} [espree] format 1`] = `
     |                                                      ^
   4 |   }
   5 |   
-  6 |   testLongNameMethodAndSomethingElseLallala() {"
+  6 |   testLongNameMethodAndSomethingElseLallala() {
+Cause: Unexpected token :"
 `;
 
 exports[`long_name_method.js - {"semi":false} [meriyah] format 1`] = `
@@ -379,7 +396,8 @@ exports[`long_name_method.js - {"semi":false} [meriyah] format 1`] = `
     |                                                      ^
   4 |   }
   5 |   
-  6 |   testLongNameMethodAndSomethingElseLallala() {"
+  6 |   testLongNameMethodAndSomethingElseLallala() {
+Cause: [3:54]: Unexpected token: ':'"
 `;
 
 exports[`long_name_method.js - {"semi":false} format 1`] = `
@@ -451,7 +469,8 @@ exports[`method_chain.js [acorn] format 1`] = `
      |         ^
   11 |         ::throttle(() =>
   12 |             interval(10)
-  13 |                 ::take(1)"
+  13 |                 ::take(1)
+Cause: Unexpected token (10:8)"
 `;
 
 exports[`method_chain.js [espree] format 1`] = `
@@ -462,7 +481,8 @@ exports[`method_chain.js [espree] format 1`] = `
      |         ^
   11 |         ::throttle(() =>
   12 |             interval(10)
-  13 |                 ::take(1)"
+  13 |                 ::take(1)
+Cause: Unexpected token :"
 `;
 
 exports[`method_chain.js [meriyah] format 1`] = `
@@ -473,7 +493,8 @@ exports[`method_chain.js [meriyah] format 1`] = `
      |         ^
   11 |         ::throttle(() =>
   12 |             interval(10)
-  13 |                 ::take(1)"
+  13 |                 ::take(1)
+Cause: [10:9]: Unexpected token: ':'"
 `;
 
 exports[`method_chain.js - {"semi":false} [acorn] format 1`] = `
@@ -484,7 +505,8 @@ exports[`method_chain.js - {"semi":false} [acorn] format 1`] = `
      |         ^
   11 |         ::throttle(() =>
   12 |             interval(10)
-  13 |                 ::take(1)"
+  13 |                 ::take(1)
+Cause: Unexpected token (10:8)"
 `;
 
 exports[`method_chain.js - {"semi":false} [espree] format 1`] = `
@@ -495,7 +517,8 @@ exports[`method_chain.js - {"semi":false} [espree] format 1`] = `
      |         ^
   11 |         ::throttle(() =>
   12 |             interval(10)
-  13 |                 ::take(1)"
+  13 |                 ::take(1)
+Cause: Unexpected token :"
 `;
 
 exports[`method_chain.js - {"semi":false} [meriyah] format 1`] = `
@@ -506,7 +529,8 @@ exports[`method_chain.js - {"semi":false} [meriyah] format 1`] = `
      |         ^
   11 |         ::throttle(() =>
   12 |             interval(10)
-  13 |                 ::take(1)"
+  13 |                 ::take(1)
+Cause: [10:9]: Unexpected token: ':'"
 `;
 
 exports[`method_chain.js - {"semi":false} format 1`] = `
@@ -610,7 +634,8 @@ exports[`short_name_method.js [acorn] format 1`] = `
     |                        ^
   4 |   }
   5 |   
-  6 |   shortMethod() {"
+  6 |   shortMethod() {
+Cause: Unexpected token (3:23)"
 `;
 
 exports[`short_name_method.js [espree] format 1`] = `
@@ -621,7 +646,8 @@ exports[`short_name_method.js [espree] format 1`] = `
     |                        ^
   4 |   }
   5 |   
-  6 |   shortMethod() {"
+  6 |   shortMethod() {
+Cause: Unexpected token :"
 `;
 
 exports[`short_name_method.js [meriyah] format 1`] = `
@@ -632,7 +658,8 @@ exports[`short_name_method.js [meriyah] format 1`] = `
     |                        ^
   4 |   }
   5 |   
-  6 |   shortMethod() {"
+  6 |   shortMethod() {
+Cause: [3:24]: Unexpected token: ':'"
 `;
 
 exports[`short_name_method.js - {"semi":false} [acorn] format 1`] = `
@@ -643,7 +670,8 @@ exports[`short_name_method.js - {"semi":false} [acorn] format 1`] = `
     |                        ^
   4 |   }
   5 |   
-  6 |   shortMethod() {"
+  6 |   shortMethod() {
+Cause: Unexpected token (3:23)"
 `;
 
 exports[`short_name_method.js - {"semi":false} [espree] format 1`] = `
@@ -654,7 +682,8 @@ exports[`short_name_method.js - {"semi":false} [espree] format 1`] = `
     |                        ^
   4 |   }
   5 |   
-  6 |   shortMethod() {"
+  6 |   shortMethod() {
+Cause: Unexpected token :"
 `;
 
 exports[`short_name_method.js - {"semi":false} [meriyah] format 1`] = `
@@ -665,7 +694,8 @@ exports[`short_name_method.js - {"semi":false} [meriyah] format 1`] = `
     |                        ^
   4 |   }
   5 |   
-  6 |   shortMethod() {"
+  6 |   shortMethod() {
+Cause: [3:24]: Unexpected token: ':'"
 `;
 
 exports[`short_name_method.js - {"semi":false} format 1`] = `
@@ -733,7 +763,8 @@ exports[`unary.js [acorn] format 1`] = `
     |   ^
   2 | !(x::y /* foo */);
   3 | !(/* foo */ x::y);
-  4 | !("
+  4 | !(
+Cause: Unexpected token (1:2)"
 `;
 
 exports[`unary.js [espree] format 1`] = `
@@ -742,7 +773,8 @@ exports[`unary.js [espree] format 1`] = `
     |   ^
   2 | !(x::y /* foo */);
   3 | !(/* foo */ x::y);
-  4 | !("
+  4 | !(
+Cause: Unexpected token :"
 `;
 
 exports[`unary.js [meriyah] format 1`] = `
@@ -751,7 +783,8 @@ exports[`unary.js [meriyah] format 1`] = `
     |   ^
   2 | !(x::y /* foo */);
   3 | !(/* foo */ x::y);
-  4 | !("
+  4 | !(
+Cause: [1:3]: Unexpected token: ':'"
 `;
 
 exports[`unary.js - {"semi":false} [acorn] format 1`] = `
@@ -760,7 +793,8 @@ exports[`unary.js - {"semi":false} [acorn] format 1`] = `
     |   ^
   2 | !(x::y /* foo */);
   3 | !(/* foo */ x::y);
-  4 | !("
+  4 | !(
+Cause: Unexpected token (1:2)"
 `;
 
 exports[`unary.js - {"semi":false} [espree] format 1`] = `
@@ -769,7 +803,8 @@ exports[`unary.js - {"semi":false} [espree] format 1`] = `
     |   ^
   2 | !(x::y /* foo */);
   3 | !(/* foo */ x::y);
-  4 | !("
+  4 | !(
+Cause: Unexpected token :"
 `;
 
 exports[`unary.js - {"semi":false} [meriyah] format 1`] = `
@@ -778,7 +813,8 @@ exports[`unary.js - {"semi":false} [meriyah] format 1`] = `
     |   ^
   2 | !(x::y /* foo */);
   3 | !(/* foo */ x::y);
-  4 | !("
+  4 | !(
+Cause: [1:3]: Unexpected token: ':'"
 `;
 
 exports[`unary.js - {"semi":false} format 1`] = `

tests/format/js/call/invalid/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`null-arguments-item.js [__babel_estree] format 1`] = `
     |            ^
   2 | foo('looooooooooooooooooooooooooooooooooooooooooooooong', , 'looooooooooooooooooooooooooooooooooooooooooooooong');
   3 | foo("a",
-  4 |     //1"
+  4 |     //1
+Cause: Unexpected token ','. (1:11)"
 `;
 
 exports[`null-arguments-item.js [acorn] format 1`] = `
@@ -15,7 +16,8 @@ exports[`null-arguments-item.js [acorn] format 1`] = `
     |           ^
   2 | foo('looooooooooooooooooooooooooooooooooooooooooooooong', , 'looooooooooooooooooooooooooooooooooooooooooooooong');
   3 | foo("a",
-  4 |     //1"
+  4 |     //1
+Cause: Unexpected token (1:10)"
 `;
 
 exports[`null-arguments-item.js [babel] format 1`] = `
@@ -24,7 +26,8 @@ exports[`null-arguments-item.js [babel] format 1`] = `
     |            ^
   2 | foo('looooooooooooooooooooooooooooooooooooooooooooooong', , 'looooooooooooooooooooooooooooooooooooooooooooooong');
   3 | foo("a",
-  4 |     //1"
+  4 |     //1
+Cause: Unexpected token ','. (1:11)"
 `;
 
 exports[`null-arguments-item.js [espree] format 1`] = `
@@ -33,7 +36,8 @@ exports[`null-arguments-item.js [espree] format 1`] = `
     |           ^
   2 | foo('looooooooooooooooooooooooooooooooooooooooooooooong', , 'looooooooooooooooooooooooooooooooooooooooooooooong');
   3 | foo("a",
-  4 |     //1"
+  4 |     //1
+Cause: Unexpected token ,"
 `;
 
 exports[`null-arguments-item.js [meriyah] format 1`] = `
@@ -42,5 +46,6 @@ exports[`null-arguments-item.js [meriyah] format 1`] = `
     |           ^
   2 | foo('looooooooooooooooooooooooooooooooooooooooooooooong', , 'looooooooooooooooooooooooooooooooooooooooooooooong');
   3 | foo("a",
-  4 |     //1"
+  4 |     //1
+Cause: [1:11]: Unexpected token: ','"
 `;

tests/format/js/class-extends/__snapshots__/jsfmt.spec.js.snap

@@ -181,7 +181,8 @@ exports[`tuple-and-record.js [acorn] format 1`] = `
     |                  ^
   3 |
   4 | class C extends [] {}
-  5 | class D extends #[] {}"
+  5 | class D extends #[] {}
+Cause: Unexpected character '{' (2:17)"
 `;
 
 exports[`tuple-and-record.js [espree] format 1`] = `
@@ -191,7 +192,8 @@ exports[`tuple-and-record.js [espree] format 1`] = `
     |                  ^
   3 |
   4 | class C extends [] {}
-  5 | class D extends #[] {}"
+  5 | class D extends #[] {}
+Cause: Unexpected character '{'"
 `;
 
 exports[`tuple-and-record.js [flow] format 1`] = `
@@ -211,7 +213,8 @@ exports[`tuple-and-record.js [meriyah] format 1`] = `
     |                 ^
   3 |
   4 | class C extends [] {}
-  5 | class D extends #[] {}"
+  5 | class D extends #[] {}
+Cause: [2:17]: '#' not followed by identifier"
 `;
 
 exports[`tuple-and-record.js [typescript] format 1`] = `
@@ -221,7 +224,8 @@ exports[`tuple-and-record.js [typescript] format 1`] = `
     |                 ^
   3 |
   4 | class C extends [] {}
-  5 | class D extends #[] {}"
+  5 | class D extends #[] {}
+Cause: Invalid character."
 `;
 
 exports[`tuple-and-record.js format 1`] = `

tests/format/js/classes-private-fields/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`optional-chaining.js [acorn] format 1`] = `
   2 |
 > 3 | delete obj?.#x.a
     |             ^
-  4 |"
+  4 |
+Cause: Private field '#x' must be declared in an enclosing class (3:12)"
 `;
 
 exports[`optional-chaining.js [espree] format 1`] = `
@@ -15,7 +16,8 @@ exports[`optional-chaining.js [espree] format 1`] = `
   2 |
 > 3 | delete obj?.#x.a
     |             ^
-  4 |"
+  4 |
+Cause: Private field '#x' must be declared in an enclosing class"
 `;
 
 exports[`optional-chaining.js [meriyah] format 1`] = `
@@ -24,7 +26,8 @@ exports[`optional-chaining.js [meriyah] format 1`] = `
   2 |
 > 3 | delete obj?.#x.a
     |             ^
-  4 |"
+  4 |
+Cause: [3:13]: Dot property must be an identifier"
 `;
 
 exports[`optional-chaining.js - {"semi":false} [acorn] format 1`] = `
@@ -33,7 +36,8 @@ exports[`optional-chaining.js - {"semi":false} [acorn] format 1`] = `
   2 |
 > 3 | delete obj?.#x.a
     |             ^
-  4 |"
+  4 |
+Cause: Private field '#x' must be declared in an enclosing class (3:12)"
 `;
 
 exports[`optional-chaining.js - {"semi":false} [espree] format 1`] = `
@@ -42,7 +46,8 @@ exports[`optional-chaining.js - {"semi":false} [espree] format 1`] = `
   2 |
 > 3 | delete obj?.#x.a
     |             ^
-  4 |"
+  4 |
+Cause: Private field '#x' must be declared in an enclosing class"
 `;
 
 exports[`optional-chaining.js - {"semi":false} [meriyah] format 1`] = `
@@ -51,7 +56,8 @@ exports[`optional-chaining.js - {"semi":false} [meriyah] format 1`] = `
   2 |
 > 3 | delete obj?.#x.a
     |             ^
-  4 |"
+  4 |
+Cause: [3:13]: Dot property must be an identifier"
 `;
 
 exports[`optional-chaining.js - {"semi":false} format 1`] = `

tests/format/js/classes/top-level-super/__snapshots__/jsfmt.spec.js.snap

@@ -4,21 +4,24 @@ exports[`example.js [acorn] format 1`] = `
 "super() call outside constructor of a subclass (1:1)
 > 1 | super();
     | ^
-  2 |"
+  2 |
+Cause: super() call outside constructor of a subclass (1:0)"
 `;
 
 exports[`example.js [espree] format 1`] = `
 "'super' keyword outside a method (1:1)
 > 1 | super();
     | ^
-  2 |"
+  2 |
+Cause: 'super' keyword outside a method"
 `;
 
 exports[`example.js [meriyah] format 1`] = `
 "Calls to super must be in the "constructor" method of a class expression or class declaration that has a superclass (1:6)
 > 1 | super();
     |      ^
-  2 |"
+  2 |
+Cause: [1:6]: Calls to super must be in the "constructor" method of a class expression or class declaration that has a superclass"
 `;
 
 exports[`example.js format 1`] = `

tests/format/js/comments-pipeline-own-line/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`pipeline_own_line.js [acorn] format 1`] = `
     | 	 ^
   5 | }
   6 |
-  7 | bifornCringerMoshedPerplexSawder("
+  7 | bifornCringerMoshedPerplexSawder(
+Cause: Unexpected token (4:2)"
 `;
 
 exports[`pipeline_own_line.js [espree] format 1`] = `
@@ -19,7 +20,8 @@ exports[`pipeline_own_line.js [espree] format 1`] = `
     | 	 ^
   5 | }
   6 |
-  7 | bifornCringerMoshedPerplexSawder("
+  7 | bifornCringerMoshedPerplexSawder(
+Cause: Unexpected token >"
 `;
 
 exports[`pipeline_own_line.js [meriyah] format 1`] = `
@@ -30,7 +32,8 @@ exports[`pipeline_own_line.js [meriyah] format 1`] = `
     | 	 ^
   5 | }
   6 |
-  7 | bifornCringerMoshedPerplexSawder("
+  7 | bifornCringerMoshedPerplexSawder(
+Cause: [4:3]: Unexpected token: '>'"
 `;
 
 exports[`pipeline_own_line.js format 1`] = `

tests/format/js/comments/__snapshots__/jsfmt.spec.js.snap

@@ -6106,7 +6106,8 @@ exports[`tuple-and-record.js [acorn] format 1`] = `
      |  ^
    8 |   key: 'value'
    9 | }
-  10 |"
+  10 |
+Cause: Unexpected character '{' (7:1)"
 `;
 
 exports[`tuple-and-record.js [espree] format 1`] = `
@@ -6117,7 +6118,8 @@ exports[`tuple-and-record.js [espree] format 1`] = `
      |  ^
    8 |   key: 'value'
    9 | }
-  10 |"
+  10 |
+Cause: Unexpected character '{'"
 `;
 
 exports[`tuple-and-record.js [flow] format 1`] = `
@@ -6139,7 +6141,8 @@ exports[`tuple-and-record.js [meriyah] format 1`] = `
      | ^
    8 |   key: 'value'
    9 | }
-  10 |"
+  10 |
+Cause: [7:1]: '#' not followed by identifier"
 `;
 
 exports[`tuple-and-record.js [typescript] format 1`] = `
@@ -6150,7 +6153,8 @@ exports[`tuple-and-record.js [typescript] format 1`] = `
      | ^
    8 |   key: 'value'
    9 | }
-  10 |"
+  10 |
+Cause: Invalid character."
 `;
 
 exports[`tuple-and-record.js - {"semi":false} [acorn] format 1`] = `
@@ -6161,7 +6165,8 @@ exports[`tuple-and-record.js - {"semi":false} [acorn] format 1`] = `
      |  ^
    8 |   key: 'value'
    9 | }
-  10 |"
+  10 |
+Cause: Unexpected character '{' (7:1)"
 `;
 
 exports[`tuple-and-record.js - {"semi":false} [espree] format 1`] = `
@@ -6172,7 +6177,8 @@ exports[`tuple-and-record.js - {"semi":false} [espree] format 1`] = `
      |  ^
    8 |   key: 'value'
    9 | }
-  10 |"
+  10 |
+Cause: Unexpected character '{'"
 `;
 
 exports[`tuple-and-record.js - {"semi":false} [flow] format 1`] = `
@@ -6194,7 +6200,8 @@ exports[`tuple-and-record.js - {"semi":false} [meriyah] format 1`] = `
      | ^
    8 |   key: 'value'
    9 | }
-  10 |"
+  10 |
+Cause: [7:1]: '#' not followed by identifier"
 `;
 
 exports[`tuple-and-record.js - {"semi":false} [typescript] format 1`] = `
@@ -6205,7 +6212,8 @@ exports[`tuple-and-record.js - {"semi":false} [typescript] format 1`] = `
      | ^
    8 |   key: 'value'
    9 | }
-  10 |"
+  10 |
+Cause: Invalid character."
 `;
 
 exports[`tuple-and-record.js - {"semi":false} format 1`] = `

tests/format/js/decorator-auto-accessors/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`basic.js [acorn] format 1`] = `
 > 2 |   accessor bar;
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:11)"
 `;
 
 exports[`basic.js [espree] format 1`] = `
@@ -15,7 +16,8 @@ exports[`basic.js [espree] format 1`] = `
 > 2 |   accessor bar;
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token bar"
 `;
 
 exports[`basic.js - {"semi":false} [acorn] format 1`] = `
@@ -24,7 +26,8 @@ exports[`basic.js - {"semi":false} [acorn] format 1`] = `
 > 2 |   accessor bar;
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:11)"
 `;
 
 exports[`basic.js - {"semi":false} [espree] format 1`] = `
@@ -33,7 +36,8 @@ exports[`basic.js - {"semi":false} [espree] format 1`] = `
 > 2 |   accessor bar;
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token bar"
 `;
 
 exports[`basic.js - {"semi":false} format 1`] = `
@@ -80,7 +84,8 @@ exports[`comments.js [acorn] format 1`] = `
     |   ^
   3 |   // comment
   4 |   accessor b;
-  5 | }"
+  5 | }
+Cause: Unexpected character '@' (2:2)"
 `;
 
 exports[`comments.js [espree] format 1`] = `
@@ -90,7 +95,8 @@ exports[`comments.js [espree] format 1`] = `
     |   ^
   3 |   // comment
   4 |   accessor b;
-  5 | }"
+  5 | }
+Cause: Unexpected character '@'"
 `;
 
 exports[`comments.js - {"semi":false} [acorn] format 1`] = `
@@ -100,7 +106,8 @@ exports[`comments.js - {"semi":false} [acorn] format 1`] = `
     |   ^
   3 |   // comment
   4 |   accessor b;
-  5 | }"
+  5 | }
+Cause: Unexpected character '@' (2:2)"
 `;
 
 exports[`comments.js - {"semi":false} [espree] format 1`] = `
@@ -110,7 +117,8 @@ exports[`comments.js - {"semi":false} [espree] format 1`] = `
     |   ^
   3 |   // comment
   4 |   accessor b;
-  5 | }"
+  5 | }
+Cause: Unexpected character '@'"
 `;
 
 exports[`comments.js - {"semi":false} format 1`] = `
@@ -164,7 +172,8 @@ exports[`computed.js [acorn] format 1`] = `
 > 2 |   accessor ["bar"];
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:11)"
 `;
 
 exports[`computed.js [espree] format 1`] = `
@@ -173,7 +182,8 @@ exports[`computed.js [espree] format 1`] = `
 > 2 |   accessor ["bar"];
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token ["
 `;
 
 exports[`computed.js - {"semi":false} [acorn] format 1`] = `
@@ -182,7 +192,8 @@ exports[`computed.js - {"semi":false} [acorn] format 1`] = `
 > 2 |   accessor ["bar"];
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:11)"
 `;
 
 exports[`computed.js - {"semi":false} [espree] format 1`] = `
@@ -191,7 +202,8 @@ exports[`computed.js - {"semi":false} [espree] format 1`] = `
 > 2 |   accessor ["bar"];
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token ["
 `;
 
 exports[`computed.js - {"semi":false} format 1`] = `
@@ -311,7 +323,8 @@ exports[`private.js [acorn] format 1`] = `
 > 2 |   accessor #bar;
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:11)"
 `;
 
 exports[`private.js [espree] format 1`] = `
@@ -320,7 +333,8 @@ exports[`private.js [espree] format 1`] = `
 > 2 |   accessor #bar;
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token #bar"
 `;
 
 exports[`private.js - {"semi":false} [acorn] format 1`] = `
@@ -329,7 +343,8 @@ exports[`private.js - {"semi":false} [acorn] format 1`] = `
 > 2 |   accessor #bar;
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:11)"
 `;
 
 exports[`private.js - {"semi":false} [espree] format 1`] = `
@@ -338,7 +353,8 @@ exports[`private.js - {"semi":false} [espree] format 1`] = `
 > 2 |   accessor #bar;
     |            ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token #bar"
 `;
 
 exports[`private.js - {"semi":false} format 1`] = `
@@ -384,7 +400,8 @@ exports[`static.js [acorn] format 1`] = `
 > 2 |   static accessor bar;
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:18)"
 `;
 
 exports[`static.js [espree] format 1`] = `
@@ -393,7 +410,8 @@ exports[`static.js [espree] format 1`] = `
 > 2 |   static accessor bar;
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token bar"
 `;
 
 exports[`static.js - {"semi":false} [acorn] format 1`] = `
@@ -402,7 +420,8 @@ exports[`static.js - {"semi":false} [acorn] format 1`] = `
 > 2 |   static accessor bar;
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:18)"
 `;
 
 exports[`static.js - {"semi":false} [espree] format 1`] = `
@@ -411,7 +430,8 @@ exports[`static.js - {"semi":false} [espree] format 1`] = `
 > 2 |   static accessor bar;
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token bar"
 `;
 
 exports[`static.js - {"semi":false} format 1`] = `
@@ -457,7 +477,8 @@ exports[`static-computed.js [acorn] format 1`] = `
 > 2 |   static accessor ["bar"];
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:18)"
 `;
 
 exports[`static-computed.js [espree] format 1`] = `
@@ -466,7 +487,8 @@ exports[`static-computed.js [espree] format 1`] = `
 > 2 |   static accessor ["bar"];
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token ["
 `;
 
 exports[`static-computed.js - {"semi":false} [acorn] format 1`] = `
@@ -475,7 +497,8 @@ exports[`static-computed.js - {"semi":false} [acorn] format 1`] = `
 > 2 |   static accessor ["bar"];
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:18)"
 `;
 
 exports[`static-computed.js - {"semi":false} [espree] format 1`] = `
@@ -484,7 +507,8 @@ exports[`static-computed.js - {"semi":false} [espree] format 1`] = `
 > 2 |   static accessor ["bar"];
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token ["
 `;
 
 exports[`static-computed.js - {"semi":false} format 1`] = `
@@ -530,7 +554,8 @@ exports[`static-private.js [acorn] format 1`] = `
 > 2 |   static accessor #bar;
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:18)"
 `;
 
 exports[`static-private.js [espree] format 1`] = `
@@ -539,7 +564,8 @@ exports[`static-private.js [espree] format 1`] = `
 > 2 |   static accessor #bar;
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token #bar"
 `;
 
 exports[`static-private.js - {"semi":false} [acorn] format 1`] = `
@@ -548,7 +574,8 @@ exports[`static-private.js - {"semi":false} [acorn] format 1`] = `
 > 2 |   static accessor #bar;
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:18)"
 `;
 
 exports[`static-private.js - {"semi":false} [espree] format 1`] = `
@@ -557,7 +584,8 @@ exports[`static-private.js - {"semi":false} [espree] format 1`] = `
 > 2 |   static accessor #bar;
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token #bar"
 `;
 
 exports[`static-private.js - {"semi":false} format 1`] = `
@@ -604,7 +632,8 @@ exports[`with-semicolon-1.js [acorn] format 1`] = `
     |            ^
   3 |   [foo]() {}
   4 | }
-  5 |   "
+  5 |   
+Cause: Unexpected token (2:11)"
 `;
 
 exports[`with-semicolon-1.js [espree] format 1`] = `
@@ -614,7 +643,8 @@ exports[`with-semicolon-1.js [espree] format 1`] = `
     |            ^
   3 |   [foo]() {}
   4 | }
-  5 |   "
+  5 |   
+Cause: Unexpected token clicked"
 `;
 
 exports[`with-semicolon-1.js - {"semi":false} [acorn] format 1`] = `
@@ -624,7 +654,8 @@ exports[`with-semicolon-1.js - {"semi":false} [acorn] format 1`] = `
     |            ^
   3 |   [foo]() {}
   4 | }
-  5 |   "
+  5 |   
+Cause: Unexpected token (2:11)"
 `;
 
 exports[`with-semicolon-1.js - {"semi":false} [espree] format 1`] = `
@@ -634,7 +665,8 @@ exports[`with-semicolon-1.js - {"semi":false} [espree] format 1`] = `
     |            ^
   3 |   [foo]() {}
   4 | }
-  5 |   "
+  5 |   
+Cause: Unexpected token clicked"
 `;
 
 exports[`with-semicolon-1.js - {"semi":false} format 1`] = `
@@ -685,7 +717,8 @@ exports[`with-semicolon-2.js [acorn] format 1`] = `
     |            ^
   3 |   *foo() {}
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token (2:11)"
 `;
 
 exports[`with-semicolon-2.js [espree] format 1`] = `
@@ -695,7 +728,8 @@ exports[`with-semicolon-2.js [espree] format 1`] = `
     |            ^
   3 |   *foo() {}
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token clicked"
 `;
 
 exports[`with-semicolon-2.js - {"semi":false} [acorn] format 1`] = `
@@ -705,7 +739,8 @@ exports[`with-semicolon-2.js - {"semi":false} [acorn] format 1`] = `
     |            ^
   3 |   *foo() {}
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token (2:11)"
 `;
 
 exports[`with-semicolon-2.js - {"semi":false} [espree] format 1`] = `
@@ -715,7 +750,8 @@ exports[`with-semicolon-2.js - {"semi":false} [espree] format 1`] = `
     |            ^
   3 |   *foo() {}
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token clicked"
 `;
 
 exports[`with-semicolon-2.js - {"semi":false} format 1`] = `

tests/format/js/decorators-export/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`after_export.js [acorn] format 1`] = `
     |        ^
   2 |
   3 | export default @decorator class {}
-  4 |"
+  4 |
+Cause: Unexpected character '@' (1:7)"
 `;
 
 exports[`after_export.js [espree] format 1`] = `
@@ -15,7 +16,8 @@ exports[`after_export.js [espree] format 1`] = `
     |        ^
   2 |
   3 | export default @decorator class {}
-  4 |"
+  4 |
+Cause: Unexpected character '@'"
 `;
 
 exports[`after_export.js [meriyah] format 1`] = `
@@ -24,7 +26,8 @@ exports[`after_export.js [meriyah] format 1`] = `
     |        ^
   2 |
   3 | export default @decorator class {}
-  4 |"
+  4 |
+Cause: [1:8]: Unexpected token: '@'"
 `;
 
 exports[`after_export.js format 1`] = `
@@ -55,7 +58,8 @@ exports[`before_export.js [acorn] format 1`] = `
     | ^
   2 | export class Foo {}
   3 |
-  4 | @decorator"
+  4 | @decorator
+Cause: Unexpected character '@' (1:0)"
 `;
 
 exports[`before_export.js [espree] format 1`] = `
@@ -64,7 +68,8 @@ exports[`before_export.js [espree] format 1`] = `
     | ^
   2 | export class Foo {}
   3 |
-  4 | @decorator"
+  4 | @decorator
+Cause: Unexpected character '@'"
 `;
 
 exports[`before_export.js format 1`] = `

tests/format/js/decorators/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`classes.js [acorn] format 1`] = `
     | ^
   2 |
   3 | @deco export class Bar {}
-  4 |"
+  4 |
+Cause: Unexpected character '@' (1:0)"
 `;
 
 exports[`classes.js [espree] format 1`] = `
@@ -15,7 +16,8 @@ exports[`classes.js [espree] format 1`] = `
     | ^
   2 |
   3 | @deco export class Bar {}
-  4 |"
+  4 |
+Cause: Unexpected character '@'"
 `;
 
 exports[`classes.js format 1`] = `
@@ -73,7 +75,8 @@ exports[`comments.js [acorn] format 1`] = `
     | ^
   4 |   a: 'a', // Comment is in the wrong place
   5 |   // test
-  6 |   b: '2'"
+  6 |   b: '2'
+Cause: Unexpected character '@' (3:0)"
 `;
 
 exports[`comments.js [espree] format 1`] = `
@@ -84,7 +87,8 @@ exports[`comments.js [espree] format 1`] = `
     | ^
   4 |   a: 'a', // Comment is in the wrong place
   5 |   // test
-  6 |   b: '2'"
+  6 |   b: '2'
+Cause: Unexpected character '@'"
 `;
 
 exports[`comments.js format 1`] = `
@@ -176,7 +180,8 @@ exports[`member-expression.js [acorn] format 1`] = `
     |     ^
   4 |     method() {}
   5 |   },
-  6 |   class {"
+  6 |   class {
+Cause: Unexpected character '@' (3:4)"
 `;
 
 exports[`member-expression.js [espree] format 1`] = `
@@ -187,7 +192,8 @@ exports[`member-expression.js [espree] format 1`] = `
     |     ^
   4 |     method() {}
   5 |   },
-  6 |   class {"
+  6 |   class {
+Cause: Unexpected character '@'"
 `;
 
 exports[`member-expression.js format 1`] = `
@@ -310,7 +316,8 @@ exports[`methods.js [acorn] format 1`] = `
     |   ^
   4 |   async plop() {}
   5 |
-  6 |   @anotherDecoratorWithALongName("and a very long string as a first argument")"
+  6 |   @anotherDecoratorWithALongName("and a very long string as a first argument")
+Cause: Unexpected character '@' (3:2)"
 `;
 
 exports[`methods.js [espree] format 1`] = `
@@ -321,7 +328,8 @@ exports[`methods.js [espree] format 1`] = `
     |   ^
   4 |   async plop() {}
   5 |
-  6 |   @anotherDecoratorWithALongName("and a very long string as a first argument")"
+  6 |   @anotherDecoratorWithALongName("and a very long string as a first argument")
+Cause: Unexpected character '@'"
 `;
 
 exports[`methods.js format 1`] = `
@@ -364,7 +372,8 @@ exports[`mixed.js [acorn] format 1`] = `
     | ^
   4 | export default class MyComponent {
   5 |   @task
-  6 |   *foo() {"
+  6 |   *foo() {
+Cause: Unexpected character '@' (3:0)"
 `;
 
 exports[`mixed.js [espree] format 1`] = `
@@ -375,7 +384,8 @@ exports[`mixed.js [espree] format 1`] = `
     | ^
   4 | export default class MyComponent {
   5 |   @task
-  6 |   *foo() {"
+  6 |   *foo() {
+Cause: Unexpected character '@'"
 `;
 
 exports[`mixed.js format 1`] = `
@@ -412,7 +422,8 @@ exports[`mobx.js [acorn] format 1`] = `
     | ^
   4 |   @observable price = 0;
   5 |   @observable amount = 1;
-  6 |"
+  6 |
+Cause: Unexpected character '@' (3:0)"
 `;
 
 exports[`mobx.js [espree] format 1`] = `
@@ -423,7 +434,8 @@ exports[`mobx.js [espree] format 1`] = `
     | ^
   4 |   @observable price = 0;
   5 |   @observable amount = 1;
-  6 |"
+  6 |
+Cause: Unexpected character '@'"
 `;
 
 exports[`mobx.js format 1`] = `
@@ -525,7 +537,8 @@ exports[`multiline.js [acorn] format 1`] = `
     |   ^
   3 |     foo,
   4 |     bar
-  5 |   ]) prop = value;"
+  5 |   ]) prop = value;
+Cause: Unexpected character '@' (2:2)"
 `;
 
 exports[`multiline.js [espree] format 1`] = `
@@ -535,7 +548,8 @@ exports[`multiline.js [espree] format 1`] = `
     |   ^
   3 |     foo,
   4 |     bar
-  5 |   ]) prop = value;"
+  5 |   ]) prop = value;
+Cause: Unexpected character '@'"
 `;
 
 exports[`multiline.js format 1`] = `
@@ -584,7 +598,8 @@ exports[`multiple.js [acorn] format 1`] = `
     |   ^
   3 |   @nonenumerable
   4 |   @doubledValue
-  5 |   legs = 4;"
+  5 |   legs = 4;
+Cause: Unexpected character '@' (2:2)"
 `;
 
 exports[`multiple.js [espree] format 1`] = `
@@ -594,7 +609,8 @@ exports[`multiple.js [espree] format 1`] = `
     |   ^
   3 |   @nonenumerable
   4 |   @doubledValue
-  5 |   legs = 4;"
+  5 |   legs = 4;
+Cause: Unexpected character '@'"
 `;
 
 exports[`multiple.js format 1`] = `
@@ -653,7 +669,8 @@ exports[`parens.js [acorn] format 1`] = `
     |   ^
   3 |   x
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected character '@' (2:2)"
 `;
 
 exports[`parens.js [espree] format 1`] = `
@@ -663,7 +680,8 @@ exports[`parens.js [espree] format 1`] = `
     |   ^
   3 |   x
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected character '@'"
 `;
 
 exports[`parens.js format 1`] = `
@@ -692,7 +710,8 @@ exports[`redux.js [acorn] format 1`] = `
     | ^
   2 | export class MyApp extends React.Component {}
   3 |
-  4 | @connect(state => ({ todos: state.todos }))"
+  4 | @connect(state => ({ todos: state.todos }))
+Cause: Unexpected character '@' (1:0)"
 `;
 
 exports[`redux.js [espree] format 1`] = `
@@ -701,7 +720,8 @@ exports[`redux.js [espree] format 1`] = `
     | ^
   2 | export class MyApp extends React.Component {}
   3 |
-  4 | @connect(state => ({ todos: state.todos }))"
+  4 | @connect(state => ({ todos: state.todos }))
+Cause: Unexpected character '@'"
 `;
 
 exports[`redux.js format 1`] = `

tests/format/js/decorators/class-expression/__snapshots__/jsfmt.spec.js.snap

@@ -5,7 +5,8 @@ exports[`arguments.js [acorn] format 1`] = `
 > 1 | console.log(@deco class Foo {})
     |             ^
   2 | console.log(@deco class {})
-  3 |"
+  3 |
+Cause: Unexpected character '@' (1:12)"
 `;
 
 exports[`arguments.js [espree] format 1`] = `
@@ -13,7 +14,8 @@ exports[`arguments.js [espree] format 1`] = `
 > 1 | console.log(@deco class Foo {})
     |             ^
   2 | console.log(@deco class {})
-  3 |"
+  3 |
+Cause: Unexpected character '@'"
 `;
 
 exports[`arguments.js [flow] format 1`] = `
@@ -29,7 +31,8 @@ exports[`arguments.js - {"semi":false} [acorn] format 1`] = `
 > 1 | console.log(@deco class Foo {})
     |             ^
   2 | console.log(@deco class {})
-  3 |"
+  3 |
+Cause: Unexpected character '@' (1:12)"
 `;
 
 exports[`arguments.js - {"semi":false} [espree] format 1`] = `
@@ -37,7 +40,8 @@ exports[`arguments.js - {"semi":false} [espree] format 1`] = `
 > 1 | console.log(@deco class Foo {})
     |             ^
   2 | console.log(@deco class {})
-  3 |"
+  3 |
+Cause: Unexpected character '@'"
 `;
 
 exports[`arguments.js - {"semi":false} [flow] format 1`] = `
@@ -99,7 +103,8 @@ exports[`class-expression.js [acorn] format 1`] = `
     |             ^
   2 | const a2 = (@deco class {});
   3 |
-  4 | (@deco class Foo {});"
+  4 | (@deco class Foo {});
+Cause: Unexpected character '@' (1:12)"
 `;
 
 exports[`class-expression.js [espree] format 1`] = `
@@ -108,7 +113,8 @@ exports[`class-expression.js [espree] format 1`] = `
     |             ^
   2 | const a2 = (@deco class {});
   3 |
-  4 | (@deco class Foo {});"
+  4 | (@deco class Foo {});
+Cause: Unexpected character '@'"
 `;
 
 exports[`class-expression.js [flow] format 1`] = `
@@ -126,7 +132,8 @@ exports[`class-expression.js - {"semi":false} [acorn] format 1`] = `
     |             ^
   2 | const a2 = (@deco class {});
   3 |
-  4 | (@deco class Foo {});"
+  4 | (@deco class Foo {});
+Cause: Unexpected character '@' (1:12)"
 `;
 
 exports[`class-expression.js - {"semi":false} [espree] format 1`] = `
@@ -135,7 +142,8 @@ exports[`class-expression.js - {"semi":false} [espree] format 1`] = `
     |             ^
   2 | const a2 = (@deco class {});
   3 |
-  4 | (@deco class Foo {});"
+  4 | (@deco class Foo {});
+Cause: Unexpected character '@'"
 `;
 
 exports[`class-expression.js - {"semi":false} [flow] format 1`] = `
@@ -267,7 +275,8 @@ exports[`member-expression.js [acorn] format 1`] = `
 > 1 | (@deco class Foo {}).name;
     |  ^
   2 | (@deco class {}).name;
-  3 |"
+  3 |
+Cause: Unexpected character '@' (1:1)"
 `;
 
 exports[`member-expression.js [espree] format 1`] = `
@@ -275,7 +284,8 @@ exports[`member-expression.js [espree] format 1`] = `
 > 1 | (@deco class Foo {}).name;
     |  ^
   2 | (@deco class {}).name;
-  3 |"
+  3 |
+Cause: Unexpected character '@'"
 `;
 
 exports[`member-expression.js [flow] format 1`] = `
@@ -291,7 +301,8 @@ exports[`member-expression.js - {"semi":false} [acorn] format 1`] = `
 > 1 | (@deco class Foo {}).name;
     |  ^
   2 | (@deco class {}).name;
-  3 |"
+  3 |
+Cause: Unexpected character '@' (1:1)"
 `;
 
 exports[`member-expression.js - {"semi":false} [espree] format 1`] = `
@@ -299,7 +310,8 @@ exports[`member-expression.js - {"semi":false} [espree] format 1`] = `
 > 1 | (@deco class Foo {}).name;
     |  ^
   2 | (@deco class {}).name;
-  3 |"
+  3 |
+Cause: Unexpected character '@'"
 `;
 
 exports[`member-expression.js - {"semi":false} [flow] format 1`] = `
@@ -361,7 +373,8 @@ exports[`super-class.js [acorn] format 1`] = `
     |                    ^
   2 |
   3 | class Foo extends (@deco class {}){}
-  4 |"
+  4 |
+Cause: Unexpected character '@' (1:19)"
 `;
 
 exports[`super-class.js [espree] format 1`] = `
@@ -370,7 +383,8 @@ exports[`super-class.js [espree] format 1`] = `
     |                    ^
   2 |
   3 | class Foo extends (@deco class {}){}
-  4 |"
+  4 |
+Cause: Unexpected character '@'"
 `;
 
 exports[`super-class.js [flow] format 1`] = `
@@ -388,7 +402,8 @@ exports[`super-class.js - {"semi":false} [acorn] format 1`] = `
     |                    ^
   2 |
   3 | class Foo extends (@deco class {}){}
-  4 |"
+  4 |
+Cause: Unexpected character '@' (1:19)"
 `;
 
 exports[`super-class.js - {"semi":false} [espree] format 1`] = `
@@ -397,7 +412,8 @@ exports[`super-class.js - {"semi":false} [espree] format 1`] = `
     |                    ^
   2 |
   3 | class Foo extends (@deco class {}){}
-  4 |"
+  4 |
+Cause: Unexpected character '@'"
 `;
 
 exports[`super-class.js - {"semi":false} [flow] format 1`] = `

tests/format/js/deferred-import-evaluation/__snapshots__/jsfmt.spec.js.snap

@@ -4,21 +4,24 @@ exports[`import-defer.js [acorn] format 1`] = `
 "Unexpected token (1:14)
 > 1 | import defer * as ns from "x";
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:13)"
 `;
 
 exports[`import-defer.js [espree] format 1`] = `
 "Unexpected token * (1:14)
 > 1 | import defer * as ns from "x";
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token *"
 `;
 
 exports[`import-defer.js [meriyah] format 1`] = `
 "Import source must be string (1:14)
 > 1 | import defer * as ns from "x";
     |              ^
-  2 |"
+  2 |
+Cause: [1:14]: Import source must be string"
 `;
 
 exports[`import-defer.js format 1`] = `
@@ -39,21 +42,24 @@ exports[`import-defer-attributes-declaration.js [acorn] format 1`] = `
 "Unexpected token (1:14)
 > 1 | import defer * as ns from "x" with { attr: "val" };
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:13)"
 `;
 
 exports[`import-defer-attributes-declaration.js [espree] format 1`] = `
 "Unexpected token * (1:14)
 > 1 | import defer * as ns from "x" with { attr: "val" };
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token *"
 `;
 
 exports[`import-defer-attributes-declaration.js [meriyah] format 1`] = `
 "Import source must be string (1:14)
 > 1 | import defer * as ns from "x" with { attr: "val" };
     |              ^
-  2 |"
+  2 |
+Cause: [1:14]: Import source must be string"
 `;
 
 exports[`import-defer-attributes-declaration.js format 1`] = `
@@ -74,68 +80,78 @@ exports[`no-default.js [__babel_estree] format 1`] = `
 "Only \`import defer * as x from "./module"\` is valid. (1:14)
 > 1 | import defer x from "x";
     |              ^
-  2 |"
+  2 |
+Cause: Only \`import defer * as x from "./module"\` is valid. (1:13)"
 `;
 
 exports[`no-default.js [acorn] format 1`] = `
 "Unexpected token (1:14)
 > 1 | import defer x from "x";
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:13)"
 `;
 
 exports[`no-default.js [babel] format 1`] = `
 "Only \`import defer * as x from "./module"\` is valid. (1:14)
 > 1 | import defer x from "x";
     |              ^
-  2 |"
+  2 |
+Cause: Only \`import defer * as x from "./module"\` is valid. (1:13)"
 `;
 
 exports[`no-default.js [espree] format 1`] = `
 "Unexpected token x (1:14)
 > 1 | import defer x from "x";
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token x"
 `;
 
 exports[`no-default.js [meriyah] format 1`] = `
 "Import source must be string (1:14)
 > 1 | import defer x from "x";
     |              ^
-  2 |"
+  2 |
+Cause: [1:14]: Import source must be string"
 `;
 
 exports[`no-named.js [__babel_estree] format 1`] = `
 "Only \`import defer * as x from "./module"\` is valid. (1:16)
 > 1 | import defer { x } from "x";
     |                ^
-  2 |"
+  2 |
+Cause: Only \`import defer * as x from "./module"\` is valid. (1:15)"
 `;
 
 exports[`no-named.js [acorn] format 1`] = `
 "Unexpected token (1:14)
 > 1 | import defer { x } from "x";
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:13)"
 `;
 
 exports[`no-named.js [babel] format 1`] = `
 "Only \`import defer * as x from "./module"\` is valid. (1:16)
 > 1 | import defer { x } from "x";
     |                ^
-  2 |"
+  2 |
+Cause: Only \`import defer * as x from "./module"\` is valid. (1:15)"
 `;
 
 exports[`no-named.js [espree] format 1`] = `
 "Unexpected token { (1:14)
 > 1 | import defer { x } from "x";
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token {"
 `;
 
 exports[`no-named.js [meriyah] format 1`] = `
 "Import source must be string (1:14)
 > 1 | import defer { x } from "x";
     |              ^
-  2 |"
+  2 |
+Cause: [1:14]: Import source must be string"
 `;

tests/format/js/destructuring-private-fields/__snapshots__/jsfmt.spec.js.snap

@@ -7,7 +7,8 @@ exports[`arrow-params.js [acorn] format 1`] = `
 > 3 |   #p = ({ #x: x }) => {}
     |           ^
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token (3:10)"
 `;
 
 exports[`arrow-params.js [espree] format 1`] = `
@@ -17,7 +18,8 @@ exports[`arrow-params.js [espree] format 1`] = `
 > 3 |   #p = ({ #x: x }) => {}
     |           ^
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token #x"
 `;
 
 exports[`arrow-params.js [meriyah] format 1`] = `
@@ -27,7 +29,8 @@ exports[`arrow-params.js [meriyah] format 1`] = `
 > 3 |   #p = ({ #x: x }) => {}
     |           ^
   4 | }
-  5 |"
+  5 |
+Cause: [3:11]: Unexpected token: 'PrivateField'"
 `;
 
 exports[`arrow-params.js format 1`] = `
@@ -58,7 +61,8 @@ exports[`assignment.js [acorn] format 1`] = `
     |        ^
   6 |   }
   7 | }
-  8 |"
+  8 |
+Cause: Unexpected token (5:7)"
 `;
 
 exports[`assignment.js [espree] format 1`] = `
@@ -69,7 +73,8 @@ exports[`assignment.js [espree] format 1`] = `
     |        ^
   6 |   }
   7 | }
-  8 |"
+  8 |
+Cause: Unexpected token #x"
 `;
 
 exports[`assignment.js [meriyah] format 1`] = `
@@ -80,7 +85,8 @@ exports[`assignment.js [meriyah] format 1`] = `
     |        ^
   6 |   }
   7 | }
-  8 |"
+  8 |
+Cause: [5:8]: Unexpected token: 'PrivateField'"
 `;
 
 exports[`assignment.js format 1`] = `
@@ -116,7 +122,8 @@ exports[`async-arrow-params.js [acorn] format 1`] = `
 > 3 |   #p = async ({ #x: x }) => {}
     |                 ^
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token (3:16)"
 `;
 
 exports[`async-arrow-params.js [espree] format 1`] = `
@@ -126,7 +133,8 @@ exports[`async-arrow-params.js [espree] format 1`] = `
 > 3 |   #p = async ({ #x: x }) => {}
     |                 ^
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token #x"
 `;
 
 exports[`async-arrow-params.js [meriyah] format 1`] = `
@@ -136,7 +144,8 @@ exports[`async-arrow-params.js [meriyah] format 1`] = `
 > 3 |   #p = async ({ #x: x }) => {}
     |                 ^
   4 | }
-  5 |"
+  5 |
+Cause: [3:17]: Unexpected token: 'PrivateField'"
 `;
 
 exports[`async-arrow-params.js format 1`] = `
@@ -167,7 +176,8 @@ exports[`bindings.js [acorn] format 1`] = `
     |            ^
   5 |   }
   6 | }
-  7 |"
+  7 |
+Cause: Unexpected token (4:11)"
 `;
 
 exports[`bindings.js [espree] format 1`] = `
@@ -178,7 +188,8 @@ exports[`bindings.js [espree] format 1`] = `
     |            ^
   5 |   }
   6 | }
-  7 |"
+  7 |
+Cause: Unexpected token #x"
 `;
 
 exports[`bindings.js [meriyah] format 1`] = `
@@ -189,7 +200,8 @@ exports[`bindings.js [meriyah] format 1`] = `
     |            ^
   5 |   }
   6 | }
-  7 |"
+  7 |
+Cause: [4:12]: Unexpected token: 'PrivateField'"
 `;
 
 exports[`bindings.js format 1`] = `
@@ -224,7 +236,8 @@ exports[`for-lhs.js [acorn] format 1`] = `
     |           ^
   6 |   }
   7 | }
-  8 |"
+  8 |
+Cause: Unexpected token (5:10)"
 `;
 
 exports[`for-lhs.js [espree] format 1`] = `
@@ -235,7 +248,8 @@ exports[`for-lhs.js [espree] format 1`] = `
     |           ^
   6 |   }
   7 | }
-  8 |"
+  8 |
+Cause: Unexpected token #x"
 `;
 
 exports[`for-lhs.js [meriyah] format 1`] = `
@@ -246,7 +260,8 @@ exports[`for-lhs.js [meriyah] format 1`] = `
     |           ^
   6 |   }
   7 | }
-  8 |"
+  8 |
+Cause: [5:11]: Unexpected token: 'PrivateField'"
 `;
 
 exports[`for-lhs.js format 1`] = `
@@ -283,7 +298,8 @@ exports[`nested-bindings.js [acorn] format 1`] = `
     |                 ^
   5 |   }
   6 | }
-  7 |"
+  7 |
+Cause: Unexpected token (4:16)"
 `;
 
 exports[`nested-bindings.js [espree] format 1`] = `
@@ -294,7 +310,8 @@ exports[`nested-bindings.js [espree] format 1`] = `
     |                 ^
   5 |   }
   6 | }
-  7 |"
+  7 |
+Cause: Unexpected token #x"
 `;
 
 exports[`nested-bindings.js [meriyah] format 1`] = `
@@ -305,7 +322,8 @@ exports[`nested-bindings.js [meriyah] format 1`] = `
     |                 ^
   5 |   }
   6 | }
-  7 |"
+  7 |
+Cause: [4:17]: Unexpected token: 'PrivateField'"
 `;
 
 exports[`nested-bindings.js format 1`] = `
@@ -345,7 +363,8 @@ exports[`valid-multiple-bindings.js [acorn] format 1`] = `
     |            ^
   5 |   }
   6 | }
-  7 |"
+  7 |
+Cause: Unexpected token (4:11)"
 `;
 
 exports[`valid-multiple-bindings.js [espree] format 1`] = `
@@ -356,7 +375,8 @@ exports[`valid-multiple-bindings.js [espree] format 1`] = `
     |            ^
   5 |   }
   6 | }
-  7 |"
+  7 |
+Cause: Unexpected token #x"
 `;
 
 exports[`valid-multiple-bindings.js [meriyah] format 1`] = `
@@ -367,7 +387,8 @@ exports[`valid-multiple-bindings.js [meriyah] format 1`] = `
     |            ^
   5 |   }
   6 | }
-  7 |"
+  7 |
+Cause: [4:12]: Unexpected token: 'PrivateField'"
 `;
 
 exports[`valid-multiple-bindings.js format 1`] = `

tests/format/js/do/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`call-arguments.js [acorn] format 1`] = `
     |   ^
   4 |     var bar = "foo";
   5 |     if (!bar) throw new Error(
-  6 |       "unreachable""
+  6 |       "unreachable"
+Cause: Unexpected token (3:2)"
 `;
 
 exports[`call-arguments.js [espree] format 1`] = `
@@ -19,7 +20,8 @@ exports[`call-arguments.js [espree] format 1`] = `
     |   ^
   4 |     var bar = "foo";
   5 |     if (!bar) throw new Error(
-  6 |       "unreachable""
+  6 |       "unreachable"
+Cause: Unexpected token do"
 `;
 
 exports[`call-arguments.js [meriyah] format 1`] = `
@@ -30,7 +32,8 @@ exports[`call-arguments.js [meriyah] format 1`] = `
     |    ^
   4 |     var bar = "foo";
   5 |     if (!bar) throw new Error(
-  6 |       "unreachable""
+  6 |       "unreachable"
+Cause: [3:4]: Unexpected token: 'do'"
 `;
 
 exports[`call-arguments.js format 1`] = `
@@ -127,7 +130,8 @@ exports[`do.js [acorn] format 1`] = `
     |     ^
   4 |       if(env === 'production') 'https://abc.mno.com/';
   5 |       else if(env === 'development') 'http://localhost:4000';
-  6 |     }"
+  6 |     }
+Cause: Unexpected token (3:4)"
 `;
 
 exports[`do.js [espree] format 1`] = `
@@ -138,7 +142,8 @@ exports[`do.js [espree] format 1`] = `
     |     ^
   4 |       if(env === 'production') 'https://abc.mno.com/';
   5 |       else if(env === 'development') 'http://localhost:4000';
-  6 |     }"
+  6 |     }
+Cause: Unexpected token do"
 `;
 
 exports[`do.js [meriyah] format 1`] = `
@@ -149,7 +154,8 @@ exports[`do.js [meriyah] format 1`] = `
     |      ^
   4 |       if(env === 'production') 'https://abc.mno.com/';
   5 |       else if(env === 'development') 'http://localhost:4000';
-  6 |     }"
+  6 |     }
+Cause: [3:6]: Unexpected token: 'do'"
 `;
 
 exports[`do.js format 1`] = `

tests/format/js/dynamic-import/__snapshots__/jsfmt.spec.js.snap

@@ -4,14 +4,16 @@ exports[`assertions.js [acorn] format 1`] = `
 "Unexpected token (1:20)
 > 1 | import("./foo.json", { assert: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:19)"
 `;
 
 exports[`assertions.js [espree] format 1`] = `
 "Unexpected token , (1:20)
 > 1 | import("./foo.json", { assert: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token ,"
 `;
 
 exports[`assertions.js [flow] format 1`] = `
@@ -25,7 +27,8 @@ exports[`assertions.js [meriyah] format 1`] = `
 "Expected ')' (1:20)
 > 1 | import("./foo.json", { assert: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: [1:20]: Expected ')'"
 `;
 
 exports[`assertions.js format 1`] = `

tests/format/js/explicit-resource-management/__snapshots__/jsfmt.spec.js.snap

@@ -4,14 +4,16 @@ exports[`for-await-using-of-comments.js [acorn] format 1`] = `
 "Unexpected token (1:19)
 > 1 | /*1*/ for /* 2 */ await /*3*/ ( /*4*/ using /*5*/ fo /*6*/ of /*7*/ of /*8*/) /*9*/;
     |                   ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:18)"
 `;
 
 exports[`for-await-using-of-comments.js [espree] format 1`] = `
 "Unexpected token await (1:19)
 > 1 | /*1*/ for /* 2 */ await /*3*/ ( /*4*/ using /*5*/ fo /*6*/ of /*7*/ of /*8*/) /*9*/;
     |                   ^
-  2 |"
+  2 |
+Cause: Unexpected token await"
 `;
 
 exports[`for-await-using-of-comments.js [flow] format 1`] = `
@@ -25,7 +27,8 @@ exports[`for-await-using-of-comments.js [meriyah] format 1`] = `
 "for await (... of ...) is only valid in async functions and async generators (1:52)
 > 1 | /*1*/ for /* 2 */ await /*3*/ ( /*4*/ using /*5*/ fo /*6*/ of /*7*/ of /*8*/) /*9*/;
     |                                                    ^
-  2 |"
+  2 |
+Cause: [1:52]: for await (... of ...) is only valid in async functions and async generators"
 `;
 
 exports[`for-await-using-of-comments.js format 1`] = `
@@ -49,7 +52,8 @@ exports[`invalid-duplicate-using-bindings.js [acorn] format 1`] = `
     |         ^
   3 | }
   4 | {
-  5 |   using g = foo();"
+  5 |   using g = foo();
+Cause: Unexpected token (2:8)"
 `;
 
 exports[`invalid-duplicate-using-bindings.js [espree] format 1`] = `
@@ -59,7 +63,8 @@ exports[`invalid-duplicate-using-bindings.js [espree] format 1`] = `
     |         ^
   3 | }
   4 | {
-  5 |   using g = foo();"
+  5 |   using g = foo();
+Cause: Unexpected token f"
 `;
 
 exports[`invalid-duplicate-using-bindings.js [flow] format 1`] = `
@@ -79,7 +84,8 @@ exports[`invalid-duplicate-using-bindings.js [meriyah] format 1`] = `
     |         ^
   3 | }
   4 | {
-  5 |   using g = foo();"
+  5 |   using g = foo();
+Cause: [2:9]: Unexpected token: 'identifier'"
 `;
 
 exports[`invalid-duplicate-using-bindings.js [typescript] format 1`] = `
@@ -89,7 +95,8 @@ exports[`invalid-duplicate-using-bindings.js [typescript] format 1`] = `
     |         ^
   3 | }
   4 | {
-  5 |   using g = foo();"
+  5 |   using g = foo();
+Cause: 'using' declarations must be initialized."
 `;
 
 exports[`invalid-duplicate-using-bindings.js format 1`] = `
@@ -123,14 +130,16 @@ exports[`invalid-script-top-level-using-binding.js [acorn] format 1`] = `
 "Unexpected token (1:7)
 > 1 | using x = bar();
     |       ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:6)"
 `;
 
 exports[`invalid-script-top-level-using-binding.js [espree] format 1`] = `
 "Unexpected token x (1:7)
 > 1 | using x = bar();
     |       ^
-  2 |"
+  2 |
+Cause: Unexpected token x"
 `;
 
 exports[`invalid-script-top-level-using-binding.js [flow] format 1`] = `
@@ -144,7 +153,8 @@ exports[`invalid-script-top-level-using-binding.js [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:7)
 > 1 | using x = bar();
     |       ^
-  2 |"
+  2 |
+Cause: [1:7]: Unexpected token: 'identifier'"
 `;
 
 exports[`invalid-script-top-level-using-binding.js format 1`] = `
@@ -168,7 +178,8 @@ exports[`using-declarations.js [acorn] format 1`] = `
     |                 ^
   3 | }
   4 |
-  5 | for(using /* 1 */ a = foo(), /* 2 */ b = foo();;);"
+  5 | for(using /* 1 */ a = foo(), /* 2 */ b = foo();;);
+Cause: Unexpected token (2:16)"
 `;
 
 exports[`using-declarations.js [espree] format 1`] = `
@@ -178,7 +189,8 @@ exports[`using-declarations.js [espree] format 1`] = `
     |                 ^
   3 | }
   4 |
-  5 | for(using /* 1 */ a = foo(), /* 2 */ b = foo();;);"
+  5 | for(using /* 1 */ a = foo(), /* 2 */ b = foo();;);
+Cause: Unexpected token a"
 `;
 
 exports[`using-declarations.js [flow] format 1`] = `
@@ -198,7 +210,8 @@ exports[`using-declarations.js [meriyah] format 1`] = `
     |                 ^
   3 | }
   4 |
-  5 | for(using /* 1 */ a = foo(), /* 2 */ b = foo();;);"
+  5 | for(using /* 1 */ a = foo(), /* 2 */ b = foo();;);
+Cause: [2:17]: Unexpected token: 'identifier'"
 `;
 
 exports[`using-declarations.js [typescript] format 1`] = `
@@ -209,7 +222,8 @@ exports[`using-declarations.js [typescript] format 1`] = `
     |                   ^^^^^^^^^
   6 |
   7 | for(using /* 1 */ foo of bar());
-  8 |"
+  8 |
+Cause: 'using' declarations may not be initialized in for statement."
 `;
 
 exports[`using-declarations.js format 1`] = `
@@ -321,7 +335,8 @@ exports[`valid-await-using-binding-basic.js [acorn] format 1`] = `
 > 2 |   await using basic = getReader();
     |               ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:14)"
 `;
 
 exports[`valid-await-using-binding-basic.js [espree] format 1`] = `
@@ -330,7 +345,8 @@ exports[`valid-await-using-binding-basic.js [espree] format 1`] = `
 > 2 |   await using basic = getReader();
     |               ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token basic"
 `;
 
 exports[`valid-await-using-binding-basic.js [flow] format 1`] = `
@@ -348,7 +364,8 @@ exports[`valid-await-using-binding-basic.js [meriyah] format 1`] = `
 > 2 |   await using basic = getReader();
     |                   ^
   3 | }
-  4 |"
+  4 |
+Cause: [2:19]: Unexpected token: 'identifier'"
 `;
 
 exports[`valid-await-using-binding-basic.js format 1`] = `
@@ -375,7 +392,8 @@ exports[`valid-await-using-binding-escaped.js [acorn] format 1`] = `
 > 2 |   await using \\u0061b = c;
     |               ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:14)"
 `;
 
 exports[`valid-await-using-binding-escaped.js [espree] format 1`] = `
@@ -384,7 +402,8 @@ exports[`valid-await-using-binding-escaped.js [espree] format 1`] = `
 > 2 |   await using \\u0061b = c;
     |               ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token \\u0061b"
 `;
 
 exports[`valid-await-using-binding-escaped.js [flow] format 1`] = `
@@ -402,7 +421,8 @@ exports[`valid-await-using-binding-escaped.js [meriyah] format 1`] = `
 > 2 |   await using \\u0061b = c;
     |               ^
   3 | }
-  4 |"
+  4 |
+Cause: [2:15]: Unexpected token: 'identifier'"
 `;
 
 exports[`valid-await-using-binding-escaped.js format 1`] = `
@@ -429,7 +449,8 @@ exports[`valid-await-using-binding-non-bmp.js [acorn] format 1`] = `
 > 2 |   await using 𠮷 = foo();
     |               ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:14)"
 `;
 
 exports[`valid-await-using-binding-non-bmp.js [espree] format 1`] = `
@@ -438,7 +459,8 @@ exports[`valid-await-using-binding-non-bmp.js [espree] format 1`] = `
 > 2 |   await using 𠮷 = foo();
     |               ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token 𠮷"
 `;
 
 exports[`valid-await-using-binding-non-bmp.js [flow] format 1`] = `
@@ -456,7 +478,8 @@ exports[`valid-await-using-binding-non-bmp.js [meriyah] format 1`] = `
 > 2 |   await using 𠮷 = foo();
     |                 ^
   3 | }
-  4 |"
+  4 |
+Cause: [2:17]: Unexpected token: 'identifier'"
 `;
 
 exports[`valid-await-using-binding-non-bmp.js format 1`] = `
@@ -484,7 +507,8 @@ exports[`valid-await-using-binding-using.js [acorn] format 1`] = `
     |               ^
   3 |   for (await using using of of);
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token (2:14)"
 `;
 
 exports[`valid-await-using-binding-using.js [espree] format 1`] = `
@@ -494,7 +518,8 @@ exports[`valid-await-using-binding-using.js [espree] format 1`] = `
     |               ^
   3 |   for (await using using of of);
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token using"
 `;
 
 exports[`valid-await-using-binding-using.js [flow] format 1`] = `
@@ -514,7 +539,8 @@ exports[`valid-await-using-binding-using.js [meriyah] format 1`] = `
     |                   ^
   3 |   for (await using using of of);
   4 | }
-  5 |"
+  5 |
+Cause: [2:19]: Unexpected token: 'identifier'"
 `;
 
 exports[`valid-await-using-binding-using.js format 1`] = `
@@ -545,7 +571,8 @@ exports[`valid-await-using-comments.js [acorn] format 1`] = `
     |                            ^
   4 | }
   5 | {
-  6 |   /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/=/*6*/x/*7*/;/*8*/;/*9*/)/*10*/;"
+  6 |   /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/=/*6*/x/*7*/;/*8*/;/*9*/)/*10*/;
+Cause: Unexpected token (3:27)"
 `;
 
 exports[`valid-await-using-comments.js [espree] format 1`] = `
@@ -556,7 +583,8 @@ exports[`valid-await-using-comments.js [espree] format 1`] = `
     |                            ^
   4 | }
   5 | {
-  6 |   /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/=/*6*/x/*7*/;/*8*/;/*9*/)/*10*/;"
+  6 |   /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/=/*6*/x/*7*/;/*8*/;/*9*/)/*10*/;
+Cause: Unexpected token b"
 `;
 
 exports[`valid-await-using-comments.js [flow] format 1`] = `
@@ -578,7 +606,8 @@ exports[`valid-await-using-comments.js [meriyah] format 1`] = `
     |                            ^
   4 | }
   5 | {
-  6 |   /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/=/*6*/x/*7*/;/*8*/;/*9*/)/*10*/;"
+  6 |   /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/=/*6*/x/*7*/;/*8*/;/*9*/)/*10*/;
+Cause: [3:28]: Unexpected token: 'identifier'"
 `;
 
 exports[`valid-await-using-comments.js [typescript] format 1`] = `
@@ -589,7 +618,8 @@ exports[`valid-await-using-comments.js [typescript] format 1`] = `
     |                                          ^^^^^^^^^^^^^
   7 | }
   8 | {
-  9 |   /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/of/*6*/x/*7*/)/*8*/;"
+  9 |   /*0*/for/*1*/(/*2*/await/*3*/using/*4*/b/*5*/of/*6*/x/*7*/)/*8*/;
+Cause: 'await using' declarations may not be initialized in for statement."
 `;
 
 exports[`valid-await-using-comments.js format 1`] = `
@@ -676,7 +706,8 @@ exports[`valid-for-using-binding-of-of.js [acorn] format 1`] = `
     |        ^
   3 |   for await (await using of of of);
   4 | }
-  5 |"
+  5 |
+Cause: Assigning to rvalue (2:7)"
 `;
 
 exports[`valid-for-using-binding-of-of.js [espree] format 1`] = `
@@ -686,7 +717,8 @@ exports[`valid-for-using-binding-of-of.js [espree] format 1`] = `
     |        ^
   3 |   for await (await using of of of);
   4 | }
-  5 |"
+  5 |
+Cause: Assigning to rvalue"
 `;
 
 exports[`valid-for-using-binding-of-of.js [flow] format 1`] = `
@@ -706,7 +738,8 @@ exports[`valid-for-using-binding-of-of.js [meriyah] format 1`] = `
     |                     ^
   3 |   for await (await using of of of);
   4 | }
-  5 |"
+  5 |
+Cause: [2:21]: Invalid left-hand side in for-of"
 `;
 
 exports[`valid-for-using-binding-of-of.js [typescript] format 1`] = `
@@ -716,7 +749,8 @@ exports[`valid-for-using-binding-of-of.js [typescript] format 1`] = `
     |                          ^
   3 |   for await (await using of of of);
   4 | }
-  5 |"
+  5 |
+Cause: ')' expected."
 `;
 
 exports[`valid-for-using-binding-of-of.js format 1`] = `
@@ -745,7 +779,8 @@ exports[`valid-for-using-declaration.js [acorn] format 1`] = `
 > 2 |   for (await using basic = reader();;);
     |                    ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:19)"
 `;
 
 exports[`valid-for-using-declaration.js [espree] format 1`] = `
@@ -754,7 +789,8 @@ exports[`valid-for-using-declaration.js [espree] format 1`] = `
 > 2 |   for (await using basic = reader();;);
     |                    ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token basic"
 `;
 
 exports[`valid-for-using-declaration.js [flow] format 1`] = `
@@ -772,7 +808,8 @@ exports[`valid-for-using-declaration.js [meriyah] format 1`] = `
 > 2 |   for (await using basic = reader();;);
     |                        ^
   3 | }
-  4 |"
+  4 |
+Cause: [2:24]: Expected ';'"
 `;
 
 exports[`valid-for-using-declaration.js [typescript] format 1`] = `
@@ -781,7 +818,8 @@ exports[`valid-for-using-declaration.js [typescript] format 1`] = `
 > 2 |   for (await using basic = reader();;);
     |                    ^^^^^^^^^^^^^^^^
   3 | }
-  4 |"
+  4 |
+Cause: 'await using' declarations may not be initialized in for statement."
 `;
 
 exports[`valid-for-using-declaration.js format 1`] = `
@@ -808,7 +846,8 @@ exports[`valid-module-block-top-level-await-using-binding.js [acorn] format 1`]
     |                  ^
   2 |   await using foo = bar();
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (1:17)"
 `;
 
 exports[`valid-module-block-top-level-await-using-binding.js [espree] format 1`] = `
@@ -817,7 +856,8 @@ exports[`valid-module-block-top-level-await-using-binding.js [espree] format 1`]
     |                  ^
   2 |   await using foo = bar();
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token {"
 `;
 
 exports[`valid-module-block-top-level-await-using-binding.js [flow] format 1`] = `
@@ -835,7 +875,8 @@ exports[`valid-module-block-top-level-await-using-binding.js [meriyah] format 1`
     |                  ^
   2 |   await using foo = bar();
   3 | }
-  4 |"
+  4 |
+Cause: [1:18]: Unexpected token: '{'"
 `;
 
 exports[`valid-module-block-top-level-await-using-binding.js [typescript] format 1`] = `
@@ -844,7 +885,8 @@ exports[`valid-module-block-top-level-await-using-binding.js [typescript] format
     |                  ^
   2 |   await using foo = bar();
   3 | }
-  4 |"
+  4 |
+Cause: ',' expected."
 `;
 
 exports[`valid-module-block-top-level-await-using-binding.js format 1`] = `
@@ -871,7 +913,8 @@ exports[`valid-module-block-top-level-using-binding.js [acorn] format 1`] = `
     |        ^
   2 |   using foo = bar();
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (1:7)"
 `;
 
 exports[`valid-module-block-top-level-using-binding.js [espree] format 1`] = `
@@ -880,7 +923,8 @@ exports[`valid-module-block-top-level-using-binding.js [espree] format 1`] = `
     |        ^
   2 |   using foo = bar();
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token {"
 `;
 
 exports[`valid-module-block-top-level-using-binding.js [flow] format 1`] = `
@@ -898,7 +942,8 @@ exports[`valid-module-block-top-level-using-binding.js [meriyah] format 1`] = `
     |        ^
   2 |   using foo = bar();
   3 | }
-  4 |"
+  4 |
+Cause: [1:8]: Unexpected token: '{'"
 `;
 
 exports[`valid-module-block-top-level-using-binding.js [typescript] format 1`] = `
@@ -907,7 +952,8 @@ exports[`valid-module-block-top-level-using-binding.js [typescript] format 1`] =
     |        ^
   2 |   using foo = bar();
   3 | }
-  4 |"
+  4 |
+Cause: Namespace must be given a name."
 `;
 
 exports[`valid-module-block-top-level-using-binding.js format 1`] = `
@@ -1057,7 +1103,8 @@ exports[`valid-using-binding-basic.js [acorn] format 1`] = `
 > 2 |   using basic = getReader();
     |         ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token (2:8)"
 `;
 
 exports[`valid-using-binding-basic.js [espree] format 1`] = `
@@ -1066,7 +1113,8 @@ exports[`valid-using-binding-basic.js [espree] format 1`] = `
 > 2 |   using basic = getReader();
     |         ^
   3 | }
-  4 |"
+  4 |
+Cause: Unexpected token basic"
 `;
 
 exports[`valid-using-binding-basic.js [flow] format 1`] = `
@@ -1084,7 +1132,8 @@ exports[`valid-using-binding-basic.js [meriyah] format 1`] = `
 > 2 |   using basic = getReader();
     |             ^
   3 | }
-  4 |"
+  4 |
+Cause: [2:13]: Unexpected token: 'identifier'"
 `;
 
 exports[`valid-using-binding-basic.js format 1`] = `
@@ -1109,14 +1158,16 @@ exports[`valid-using-binding-escaped.js [acorn] format 1`] = `
 "Unexpected token (1:9)
 > 1 | { using \\u0061b = c; }
     |         ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:8)"
 `;
 
 exports[`valid-using-binding-escaped.js [espree] format 1`] = `
 "Unexpected token \\u0061b (1:9)
 > 1 | { using \\u0061b = c; }
     |         ^
-  2 |"
+  2 |
+Cause: Unexpected token \\u0061b"
 `;
 
 exports[`valid-using-binding-escaped.js [flow] format 1`] = `
@@ -1130,7 +1181,8 @@ exports[`valid-using-binding-escaped.js [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:9)
 > 1 | { using \\u0061b = c; }
     |         ^
-  2 |"
+  2 |
+Cause: [1:9]: Unexpected token: 'identifier'"
 `;
 
 exports[`valid-using-binding-escaped.js format 1`] = `
@@ -1153,14 +1205,16 @@ exports[`valid-using-binding-non-bmp.js [acorn] format 1`] = `
 "Unexpected token (1:9)
 > 1 | { using 𠮷 = foo(); }
     |         ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:8)"
 `;
 
 exports[`valid-using-binding-non-bmp.js [espree] format 1`] = `
 "Unexpected token 𠮷 (1:9)
 > 1 | { using 𠮷 = foo(); }
     |         ^
-  2 |"
+  2 |
+Cause: Unexpected token 𠮷"
 `;
 
 exports[`valid-using-binding-non-bmp.js [flow] format 1`] = `
@@ -1174,7 +1228,8 @@ exports[`valid-using-binding-non-bmp.js [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:11)
 > 1 | { using 𠮷 = foo(); }
     |           ^
-  2 |"
+  2 |
+Cause: [1:11]: Unexpected token: 'identifier'"
 `;
 
 exports[`valid-using-binding-non-bmp.js format 1`] = `
@@ -1200,7 +1255,8 @@ exports[`valid-using-binding-using.js [acorn] format 1`] = `
     |         ^
   3 |   for (using using of of);
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token (2:8)"
 `;
 
 exports[`valid-using-binding-using.js [espree] format 1`] = `
@@ -1210,7 +1266,8 @@ exports[`valid-using-binding-using.js [espree] format 1`] = `
     |         ^
   3 |   for (using using of of);
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token using"
 `;
 
 exports[`valid-using-binding-using.js [flow] format 1`] = `
@@ -1230,7 +1287,8 @@ exports[`valid-using-binding-using.js [meriyah] format 1`] = `
     |             ^
   3 |   for (using using of of);
   4 | }
-  5 |"
+  5 |
+Cause: [2:13]: Unexpected token: 'identifier'"
 `;
 
 exports[`valid-using-binding-using.js format 1`] = `

tests/format/js/export-default/escaped/__snapshots__/jsfmt.spec.js.snap

@@ -4,14 +4,16 @@ exports[`default-escaped.js [acorn] format 1`] = `
 "Unexpected token (2:8)
   1 | // export asyn\\u{63} from "async";
 > 2 | export n\\u{63} from "async";
-    |        ^"
+    |        ^
+Cause: Unexpected token (2:7)"
 `;
 
 exports[`default-escaped.js [espree] format 1`] = `
 "Unexpected token n\\u{63} (2:8)
   1 | // export asyn\\u{63} from "async";
 > 2 | export n\\u{63} from "async";
-    |        ^"
+    |        ^
+Cause: Unexpected token n\\u{63}"
 `;
 
 exports[`default-escaped.js [flow] format 1`] = `
@@ -25,7 +27,8 @@ exports[`default-escaped.js [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (2:12)
   1 | // export asyn\\u{63} from "async";
 > 2 | export n\\u{63} from "async";
-    |            ^"
+    |            ^
+Cause: [2:12]: Unexpected token: 'identifier'"
 `;
 
 exports[`default-escaped.js format 1`] = `

tests/format/js/export-default/export-default-from/__snapshots__/jsfmt.spec.js.snap

@@ -7,7 +7,8 @@ exports[`export.js [acorn] format 1`] = `
     |        ^
   3 | export a, * as b from 'mod';
   4 | export c, { foo } from 'mod';
-  5 | export * as d from 'mod';"
+  5 | export * as d from 'mod';
+Cause: Unexpected token (2:7)"
 `;
 
 exports[`export.js [espree] format 1`] = `
@@ -17,7 +18,8 @@ exports[`export.js [espree] format 1`] = `
     |        ^
   3 | export a, * as b from 'mod';
   4 | export c, { foo } from 'mod';
-  5 | export * as d from 'mod';"
+  5 | export * as d from 'mod';
+Cause: Unexpected token v"
 `;
 
 exports[`export.js [meriyah] format 1`] = `
@@ -27,7 +29,8 @@ exports[`export.js [meriyah] format 1`] = `
     |        ^
   3 | export a, * as b from 'mod';
   4 | export c, { foo } from 'mod';
-  5 | export * as d from 'mod';"
+  5 | export * as d from 'mod';
+Cause: [2:8]: Unexpected token: 'identifier'"
 `;
 
 exports[`export.js format 1`] = `

tests/format/js/export-star/__snapshots__/jsfmt.spec.js.snap

@@ -75,7 +75,8 @@ exports[`export-star-as-string.js [typescript] format 1`] = `
 "Identifier expected. (1:13)
 > 1 | export * as 'foo' from 'foo'
     |             ^
-  2 |"
+  2 |
+Cause: Identifier expected."
 `;
 
 exports[`export-star-as-string.js format 1`] = `
@@ -103,7 +104,8 @@ exports[`export-star-as-string2.js [typescript] format 1`] = `
 "Identifier expected. (1:13)
 > 1 | export * as "foo" from 'foo'
     |             ^
-  2 |"
+  2 |
+Cause: Identifier expected."
 `;
 
 exports[`export-star-as-string2.js format 1`] = `

tests/format/js/export/__snapshots__/jsfmt.spec.js.snap

@@ -349,28 +349,32 @@ exports[`undefined.js [acorn] format 1`] = `
 "Export 'undefinedExport' is not defined (1:10)
 > 1 | export { undefinedExport };
     |          ^
-  2 |"
+  2 |
+Cause: Export 'undefinedExport' is not defined (1:9)"
 `;
 
 exports[`undefined.js [espree] format 1`] = `
 "Export 'undefinedExport' is not defined (1:10)
 > 1 | export { undefinedExport };
     |          ^
-  2 |"
+  2 |
+Cause: Export 'undefinedExport' is not defined"
 `;
 
 exports[`undefined.js - {"bracketSpacing":false} [acorn] format 1`] = `
 "Export 'undefinedExport' is not defined (1:10)
 > 1 | export { undefinedExport };
     |          ^
-  2 |"
+  2 |
+Cause: Export 'undefinedExport' is not defined (1:9)"
 `;
 
 exports[`undefined.js - {"bracketSpacing":false} [espree] format 1`] = `
 "Export 'undefinedExport' is not defined (1:10)
 > 1 | export { undefinedExport };
     |          ^
-  2 |"
+  2 |
+Cause: Export 'undefinedExport' is not defined"
 `;
 
 exports[`undefined.js - {"bracketSpacing":false} format 1`] = `

tests/format/js/function-single-destructuring/__snapshots__/jsfmt.spec.js.snap

@@ -243,7 +243,8 @@ exports[`tuple-and-record.js [acorn] format 1`] = `
      |      ^
   23 | }
   24 |
-  25 | function StatelessFunctionalComponent3(["
+  25 | function StatelessFunctionalComponent3([
+Cause: Unexpected character '{' (22:5)"
 `;
 
 exports[`tuple-and-record.js [espree] format 1`] = `
@@ -254,7 +255,8 @@ exports[`tuple-and-record.js [espree] format 1`] = `
      |      ^
   23 | }
   24 |
-  25 | function StatelessFunctionalComponent3(["
+  25 | function StatelessFunctionalComponent3([
+Cause: Unexpected character '{'"
 `;
 
 exports[`tuple-and-record.js [flow] format 1`] = `
@@ -276,7 +278,8 @@ exports[`tuple-and-record.js [meriyah] format 1`] = `
      |     ^
   23 | }
   24 |
-  25 | function StatelessFunctionalComponent3(["
+  25 | function StatelessFunctionalComponent3([
+Cause: [22:5]: '#' not followed by identifier"
 `;
 
 exports[`tuple-and-record.js format 1`] = `

tests/format/js/ignore/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`class-expression-decorator.js [acorn] format 1`] = `
     |   ^
   4 |   class {}
   5 | );
-  6 |"
+  6 |
+Cause: Unexpected character '@' (3:2)"
 `;
 
 exports[`class-expression-decorator.js [espree] format 1`] = `
@@ -19,7 +20,8 @@ exports[`class-expression-decorator.js [espree] format 1`] = `
     |   ^
   4 |   class {}
   5 | );
-  6 |"
+  6 |
+Cause: Unexpected character '@'"
 `;
 
 exports[`class-expression-decorator.js [flow] format 1`] = `
@@ -61,7 +63,8 @@ exports[`decorator.js [acorn] format 1`] = `
 > 2 | @decorator
     | ^
   3 | class A {}
-  4 |"
+  4 |
+Cause: Unexpected character '@' (2:0)"
 `;
 
 exports[`decorator.js [espree] format 1`] = `
@@ -70,7 +73,8 @@ exports[`decorator.js [espree] format 1`] = `
 > 2 | @decorator
     | ^
   3 | class A {}
-  4 |"
+  4 |
+Cause: Unexpected character '@'"
 `;
 
 exports[`decorator.js format 1`] = `

tests/format/js/import-assertions/__snapshots__/jsfmt.spec.js.snap

@@ -4,21 +4,24 @@ exports[`dynamic-import.js [acorn] format 1`] = `
 "Unexpected token (1:20)
 > 1 | import("./foo.json", { assert: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:19)"
 `;
 
 exports[`dynamic-import.js [espree] format 1`] = `
 "Unexpected token , (1:20)
 > 1 | import("./foo.json", { assert: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token ,"
 `;
 
 exports[`dynamic-import.js [meriyah] format 1`] = `
 "Expected ')' (1:20)
 > 1 | import("./foo.json", { assert: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: [1:20]: Expected ')'"
 `;
 
 exports[`dynamic-import.js format 1`] = `
@@ -42,7 +45,8 @@ exports[`empty.js [acorn] format 1`] = `
     |                                 ^
   3 | export * as baz from "baz.json" assert { /* comment */ }
   4 |
-  5 | import * as foo from "foo.json""
+  5 | import * as foo from "foo.json"
+Cause: Unexpected token (2:32)"
 `;
 
 exports[`empty.js [espree] format 1`] = `
@@ -52,7 +56,8 @@ exports[`empty.js [espree] format 1`] = `
     |                                 ^
   3 | export * as baz from "baz.json" assert { /* comment */ }
   4 |
-  5 | import * as foo from "foo.json""
+  5 | import * as foo from "foo.json"
+Cause: Unexpected token assert"
 `;
 
 exports[`empty.js [meriyah] format 1`] = `
@@ -62,7 +67,8 @@ exports[`empty.js [meriyah] format 1`] = `
     |                                      ^
   3 | export * as baz from "baz.json" assert { /* comment */ }
   4 |
-  5 | import * as foo from "foo.json""
+  5 | import * as foo from "foo.json"
+Cause: [2:38]: Unexpected token: 'identifier'"
 `;
 
 exports[`empty.js format 1`] = `
@@ -94,21 +100,24 @@ exports[`multi-types.js [acorn] format 1`] = `
 "Unexpected token (1:31)
 > 1 | import json from "./foo.json" assert { type: "json", type: "bar" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:30)"
 `;
 
 exports[`multi-types.js [espree] format 1`] = `
 "Unexpected token assert (1:31)
 > 1 | import json from "./foo.json" assert { type: "json", type: "bar" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token assert"
 `;
 
 exports[`multi-types.js [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:36)
 > 1 | import json from "./foo.json" assert { type: "json", type: "bar" };
     |                                    ^
-  2 |"
+  2 |
+Cause: [1:36]: Unexpected token: 'identifier'"
 `;
 
 exports[`multi-types.js format 1`] = `
@@ -129,21 +138,24 @@ exports[`non-type.js [acorn] format 1`] = `
 "Unexpected token (1:28)
 > 1 | import foo from "foo.json" assert { lazy: "true" };
     |                            ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:27)"
 `;
 
 exports[`non-type.js [espree] format 1`] = `
 "Unexpected token assert (1:28)
 > 1 | import foo from "foo.json" assert { lazy: "true" };
     |                            ^
-  2 |"
+  2 |
+Cause: Unexpected token assert"
 `;
 
 exports[`non-type.js [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:33)
 > 1 | import foo from "foo.json" assert { lazy: "true" };
     |                                 ^
-  2 |"
+  2 |
+Cause: [1:33]: Unexpected token: 'identifier'"
 `;
 
 exports[`non-type.js format 1`] = `
@@ -182,7 +194,8 @@ exports[`re-export.js [acorn] format 1`] = `
     |                                            ^
   2 | export * from "foo.json" assert { type: "json" };
   3 | export * as foo3 from "foo.json" assert { type: "json" };
-  4 |"
+  4 |
+Cause: Unexpected token (1:43)"
 `;
 
 exports[`re-export.js [espree] format 1`] = `
@@ -191,7 +204,8 @@ exports[`re-export.js [espree] format 1`] = `
     |                                            ^
   2 | export * from "foo.json" assert { type: "json" };
   3 | export * as foo3 from "foo.json" assert { type: "json" };
-  4 |"
+  4 |
+Cause: Unexpected token assert"
 `;
 
 exports[`re-export.js [meriyah] format 1`] = `
@@ -200,7 +214,8 @@ exports[`re-export.js [meriyah] format 1`] = `
     |                                                 ^
   2 | export * from "foo.json" assert { type: "json" };
   3 | export * as foo3 from "foo.json" assert { type: "json" };
-  4 |"
+  4 |
+Cause: [1:49]: Unexpected token: 'identifier'"
 `;
 
 exports[`re-export.js format 1`] = `
@@ -225,21 +240,24 @@ exports[`static-import.js [acorn] format 1`] = `
 "Unexpected token (1:31)
 > 1 | import json from "./foo.json" assert { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:30)"
 `;
 
 exports[`static-import.js [espree] format 1`] = `
 "Unexpected token assert (1:31)
 > 1 | import json from "./foo.json" assert { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token assert"
 `;
 
 exports[`static-import.js [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:36)
 > 1 | import json from "./foo.json" assert { type: "json" };
     |                                    ^
-  2 |"
+  2 |
+Cause: [1:36]: Unexpected token: 'identifier'"
 `;
 
 exports[`static-import.js format 1`] = `
@@ -260,21 +278,24 @@ exports[`without-from.js [acorn] format 1`] = `
 "Unexpected token (1:14)
 > 1 | import "foo" assert { type: "json" }
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:13)"
 `;
 
 exports[`without-from.js [espree] format 1`] = `
 "Unexpected token assert (1:14)
 > 1 | import "foo" assert { type: "json" }
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token assert"
 `;
 
 exports[`without-from.js [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:19)
 > 1 | import "foo" assert { type: "json" }
     |                   ^
-  2 |"
+  2 |
+Cause: [1:19]: Unexpected token: 'identifier'"
 `;
 
 exports[`without-from.js format 1`] = `

tests/format/js/import-assertions/bracket-spacing/__snapshots__/jsfmt.spec.js.snap

@@ -4,21 +4,24 @@ exports[`dynamic-import.js - {"bracketSpacing":false} [acorn] format 1`] = `
 "Unexpected token (1:20)
 > 1 | import("./foo.json", { assert: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:19)"
 `;
 
 exports[`dynamic-import.js - {"bracketSpacing":false} [espree] format 1`] = `
 "Unexpected token , (1:20)
 > 1 | import("./foo.json", { assert: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token ,"
 `;
 
 exports[`dynamic-import.js - {"bracketSpacing":false} [meriyah] format 1`] = `
 "Expected ')' (1:20)
 > 1 | import("./foo.json", { assert: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: [1:20]: Expected ')'"
 `;
 
 exports[`dynamic-import.js - {"bracketSpacing":false} format 1`] = `
@@ -39,19 +42,22 @@ import("./foo.json", {assert: {type: "json"}});
 exports[`empty.js - {"bracketSpacing":false} [acorn] format 1`] = `
 "Unexpected token (1:33)
 > 1 | export * as bar from "bar.json" assert { }
-    |                                 ^"
+    |                                 ^
+Cause: Unexpected token (1:32)"
 `;
 
 exports[`empty.js - {"bracketSpacing":false} [espree] format 1`] = `
 "Unexpected token assert (1:33)
 > 1 | export * as bar from "bar.json" assert { }
-    |                                 ^"
+    |                                 ^
+Cause: Unexpected token assert"
 `;
 
 exports[`empty.js - {"bracketSpacing":false} [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:38)
 > 1 | export * as bar from "bar.json" assert { }
-    |                                      ^"
+    |                                      ^
+Cause: [1:38]: Unexpected token: 'identifier'"
 `;
 
 exports[`empty.js - {"bracketSpacing":false} format 1`] = `
@@ -72,21 +78,24 @@ exports[`re-export.js - {"bracketSpacing":false} [acorn] format 1`] = `
 "Unexpected token (1:44)
 > 1 | export { default as foo2 } from "foo.json" assert { type: "json" };
     |                                            ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:43)"
 `;
 
 exports[`re-export.js - {"bracketSpacing":false} [espree] format 1`] = `
 "Unexpected token assert (1:44)
 > 1 | export { default as foo2 } from "foo.json" assert { type: "json" };
     |                                            ^
-  2 |"
+  2 |
+Cause: Unexpected token assert"
 `;
 
 exports[`re-export.js - {"bracketSpacing":false} [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:49)
 > 1 | export { default as foo2 } from "foo.json" assert { type: "json" };
     |                                                 ^
-  2 |"
+  2 |
+Cause: [1:49]: Unexpected token: 'identifier'"
 `;
 
 exports[`re-export.js - {"bracketSpacing":false} format 1`] = `
@@ -108,21 +117,24 @@ exports[`static-import.js - {"bracketSpacing":false} [acorn] format 1`] = `
 "Unexpected token (1:31)
 > 1 | import json from "./foo.json" assert { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:30)"
 `;
 
 exports[`static-import.js - {"bracketSpacing":false} [espree] format 1`] = `
 "Unexpected token assert (1:31)
 > 1 | import json from "./foo.json" assert { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token assert"
 `;
 
 exports[`static-import.js - {"bracketSpacing":false} [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:36)
 > 1 | import json from "./foo.json" assert { type: "json" };
     |                                    ^
-  2 |"
+  2 |
+Cause: [1:36]: Unexpected token: 'identifier'"
 `;
 
 exports[`static-import.js - {"bracketSpacing":false} format 1`] = `

tests/format/js/import-attributes/__snapshots__/jsfmt.spec.js.snap

@@ -4,21 +4,24 @@ exports[`dynamic-import.js [acorn] format 1`] = `
 "Unexpected token (1:20)
 > 1 | import("./foo.json", { with: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:19)"
 `;
 
 exports[`dynamic-import.js [espree] format 1`] = `
 "Unexpected token , (1:20)
 > 1 | import("./foo.json", { with: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token ,"
 `;
 
 exports[`dynamic-import.js [meriyah] format 1`] = `
 "Expected ')' (1:20)
 > 1 | import("./foo.json", { with: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: [1:20]: Expected ')'"
 `;
 
 exports[`dynamic-import.js format 1`] = `
@@ -42,7 +45,8 @@ exports[`empty.js [acorn] format 1`] = `
     |                                 ^
   3 | export * as baz from "baz.json" with { /* comment */ }
   4 |
-  5 | import * as foo from "foo.json""
+  5 | import * as foo from "foo.json"
+Cause: Unexpected token (2:32)"
 `;
 
 exports[`empty.js [espree] format 1`] = `
@@ -52,7 +56,8 @@ exports[`empty.js [espree] format 1`] = `
     |                                 ^
   3 | export * as baz from "baz.json" with { /* comment */ }
   4 |
-  5 | import * as foo from "foo.json""
+  5 | import * as foo from "foo.json"
+Cause: Unexpected token with"
 `;
 
 exports[`empty.js [meriyah] format 1`] = `
@@ -62,7 +67,8 @@ exports[`empty.js [meriyah] format 1`] = `
     |                                    ^
   3 | export * as baz from "baz.json" with { /* comment */ }
   4 |
-  5 | import * as foo from "foo.json""
+  5 | import * as foo from "foo.json"
+Cause: [2:36]: Unexpected token: 'with'"
 `;
 
 exports[`empty.js [typescript] format 1`] = `
@@ -72,7 +78,8 @@ exports[`empty.js [typescript] format 1`] = `
     |                                 ^
   3 | export * as baz from "baz.json" with { /* comment */ }
   4 |
-  5 | import * as foo from "foo.json""
+  5 | import * as foo from "foo.json"
+Cause: ';' expected."
 `;
 
 exports[`empty.js format 1`] = `
@@ -105,28 +112,32 @@ exports[`multi-types.js [acorn] format 1`] = `
 "Unexpected token (1:31)
 > 1 | import json from "./foo.json" with { type: "json", type: "bar" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:30)"
 `;
 
 exports[`multi-types.js [espree] format 1`] = `
 "Unexpected token with (1:31)
 > 1 | import json from "./foo.json" with { type: "json", type: "bar" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token with"
 `;
 
 exports[`multi-types.js [meriyah] format 1`] = `
 "Unexpected token: 'with' (1:34)
 > 1 | import json from "./foo.json" with { type: "json", type: "bar" };
     |                                  ^
-  2 |"
+  2 |
+Cause: [1:34]: Unexpected token: 'with'"
 `;
 
 exports[`multi-types.js [typescript] format 1`] = `
 "';' expected. (1:31)
 > 1 | import json from "./foo.json" with { type: "json", type: "bar" };
     |                               ^
-  2 |"
+  2 |
+Cause: ';' expected."
 `;
 
 exports[`multi-types.js format 1`] = `
@@ -147,28 +158,32 @@ exports[`non-type.js [acorn] format 1`] = `
 "Unexpected token (1:28)
 > 1 | import foo from "foo.json" with { lazy: "true" };
     |                            ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:27)"
 `;
 
 exports[`non-type.js [espree] format 1`] = `
 "Unexpected token with (1:28)
 > 1 | import foo from "foo.json" with { lazy: "true" };
     |                            ^
-  2 |"
+  2 |
+Cause: Unexpected token with"
 `;
 
 exports[`non-type.js [meriyah] format 1`] = `
 "Unexpected token: 'with' (1:31)
 > 1 | import foo from "foo.json" with { lazy: "true" };
     |                               ^
-  2 |"
+  2 |
+Cause: [1:31]: Unexpected token: 'with'"
 `;
 
 exports[`non-type.js [typescript] format 1`] = `
 "';' expected. (1:28)
 > 1 | import foo from "foo.json" with { lazy: "true" };
     |                            ^
-  2 |"
+  2 |
+Cause: ';' expected."
 `;
 
 exports[`non-type.js format 1`] = `
@@ -191,7 +206,8 @@ exports[`re-export.js [acorn] format 1`] = `
     |                                            ^
   2 | export * from "foo.json" with { type: "json" };
   3 | export * as foo3 from "foo.json" with { type: "json" };
-  4 |"
+  4 |
+Cause: Unexpected token (1:43)"
 `;
 
 exports[`re-export.js [espree] format 1`] = `
@@ -200,7 +216,8 @@ exports[`re-export.js [espree] format 1`] = `
     |                                            ^
   2 | export * from "foo.json" with { type: "json" };
   3 | export * as foo3 from "foo.json" with { type: "json" };
-  4 |"
+  4 |
+Cause: Unexpected token with"
 `;
 
 exports[`re-export.js [meriyah] format 1`] = `
@@ -209,7 +226,8 @@ exports[`re-export.js [meriyah] format 1`] = `
     |                                               ^
   2 | export * from "foo.json" with { type: "json" };
   3 | export * as foo3 from "foo.json" with { type: "json" };
-  4 |"
+  4 |
+Cause: [1:47]: Unexpected token: 'with'"
 `;
 
 exports[`re-export.js [typescript] format 1`] = `
@@ -218,7 +236,8 @@ exports[`re-export.js [typescript] format 1`] = `
     |                                            ^
   2 | export * from "foo.json" with { type: "json" };
   3 | export * as foo3 from "foo.json" with { type: "json" };
-  4 |"
+  4 |
+Cause: ';' expected."
 `;
 
 exports[`re-export.js format 1`] = `
@@ -243,28 +262,32 @@ exports[`static-import.js [acorn] format 1`] = `
 "Unexpected token (1:31)
 > 1 | import json from "./foo.json" with { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:30)"
 `;
 
 exports[`static-import.js [espree] format 1`] = `
 "Unexpected token with (1:31)
 > 1 | import json from "./foo.json" with { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token with"
 `;
 
 exports[`static-import.js [meriyah] format 1`] = `
 "Unexpected token: 'with' (1:34)
 > 1 | import json from "./foo.json" with { type: "json" };
     |                                  ^
-  2 |"
+  2 |
+Cause: [1:34]: Unexpected token: 'with'"
 `;
 
 exports[`static-import.js [typescript] format 1`] = `
 "';' expected. (1:31)
 > 1 | import json from "./foo.json" with { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: ';' expected."
 `;
 
 exports[`static-import.js format 1`] = `
@@ -285,28 +308,32 @@ exports[`without-from.js [acorn] format 1`] = `
 "Unexpected token (1:14)
 > 1 | import "foo" with { type: "json" }
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:13)"
 `;
 
 exports[`without-from.js [espree] format 1`] = `
 "Unexpected token with (1:14)
 > 1 | import "foo" with { type: "json" }
     |              ^
-  2 |"
+  2 |
+Cause: Unexpected token with"
 `;
 
 exports[`without-from.js [meriyah] format 1`] = `
 "Unexpected token: 'with' (1:17)
 > 1 | import "foo" with { type: "json" }
     |                 ^
-  2 |"
+  2 |
+Cause: [1:17]: Unexpected token: 'with'"
 `;
 
 exports[`without-from.js [typescript] format 1`] = `
 "';' expected. (1:14)
 > 1 | import "foo" with { type: "json" }
     |              ^
-  2 |"
+  2 |
+Cause: ';' expected."
 `;
 
 exports[`without-from.js format 1`] = `

tests/format/js/import-attributes/bracket-spacing/__snapshots__/jsfmt.spec.js.snap

@@ -4,21 +4,24 @@ exports[`dynamic-import.js - {"bracketSpacing":false} [acorn] format 1`] = `
 "Unexpected token (1:20)
 > 1 | import("./foo.json", { with: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:19)"
 `;
 
 exports[`dynamic-import.js - {"bracketSpacing":false} [espree] format 1`] = `
 "Unexpected token , (1:20)
 > 1 | import("./foo.json", { with: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token ,"
 `;
 
 exports[`dynamic-import.js - {"bracketSpacing":false} [meriyah] format 1`] = `
 "Expected ')' (1:20)
 > 1 | import("./foo.json", { with: { type: "json" } });
     |                    ^
-  2 |"
+  2 |
+Cause: [1:20]: Expected ')'"
 `;
 
 exports[`dynamic-import.js - {"bracketSpacing":false} format 1`] = `
@@ -39,19 +42,22 @@ import("./foo.json", {with: {type: "json"}});
 exports[`empty.js - {"bracketSpacing":false} [acorn] format 1`] = `
 "Unexpected token (1:33)
 > 1 | export * as bar from "bar.json" with { }
-    |                                 ^"
+    |                                 ^
+Cause: Unexpected token (1:32)"
 `;
 
 exports[`empty.js - {"bracketSpacing":false} [espree] format 1`] = `
 "Unexpected token with (1:33)
 > 1 | export * as bar from "bar.json" with { }
-    |                                 ^"
+    |                                 ^
+Cause: Unexpected token with"
 `;
 
 exports[`empty.js - {"bracketSpacing":false} [meriyah] format 1`] = `
 "Unexpected token: 'with' (1:36)
 > 1 | export * as bar from "bar.json" with { }
-    |                                    ^"
+    |                                    ^
+Cause: [1:36]: Unexpected token: 'with'"
 `;
 
 exports[`empty.js - {"bracketSpacing":false} format 1`] = `
@@ -72,21 +78,24 @@ exports[`re-export.js - {"bracketSpacing":false} [acorn] format 1`] = `
 "Unexpected token (1:44)
 > 1 | export { default as foo2 } from "foo.json" with { type: "json" };
     |                                            ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:43)"
 `;
 
 exports[`re-export.js - {"bracketSpacing":false} [espree] format 1`] = `
 "Unexpected token with (1:44)
 > 1 | export { default as foo2 } from "foo.json" with { type: "json" };
     |                                            ^
-  2 |"
+  2 |
+Cause: Unexpected token with"
 `;
 
 exports[`re-export.js - {"bracketSpacing":false} [meriyah] format 1`] = `
 "Unexpected token: 'with' (1:47)
 > 1 | export { default as foo2 } from "foo.json" with { type: "json" };
     |                                               ^
-  2 |"
+  2 |
+Cause: [1:47]: Unexpected token: 'with'"
 `;
 
 exports[`re-export.js - {"bracketSpacing":false} format 1`] = `
@@ -108,21 +117,24 @@ exports[`static-import.js - {"bracketSpacing":false} [acorn] format 1`] = `
 "Unexpected token (1:31)
 > 1 | import json from "./foo.json" with { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:30)"
 `;
 
 exports[`static-import.js - {"bracketSpacing":false} [espree] format 1`] = `
 "Unexpected token with (1:31)
 > 1 | import json from "./foo.json" with { type: "json" };
     |                               ^
-  2 |"
+  2 |
+Cause: Unexpected token with"
 `;
 
 exports[`static-import.js - {"bracketSpacing":false} [meriyah] format 1`] = `
 "Unexpected token: 'with' (1:34)
 > 1 | import json from "./foo.json" with { type: "json" };
     |                                  ^
-  2 |"
+  2 |
+Cause: [1:34]: Unexpected token: 'with'"
 `;
 
 exports[`static-import.js - {"bracketSpacing":false} format 1`] = `

tests/format/js/import-reflection/__snapshots__/jsfmt.spec.js.snap

@@ -4,14 +4,16 @@ exports[`comments.js [acorn] format 1`] = `
 "Unexpected token (1:48)
 > 1 | /* 0 */import /* 1 */module /* 2 */from /* 3 */from /* 4 */"./module.wasm"/* 5 */;
     |                                                ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:47)"
 `;
 
 exports[`comments.js [espree] format 1`] = `
 "Unexpected token from (1:48)
 > 1 | /* 0 */import /* 1 */module /* 2 */from /* 3 */from /* 4 */"./module.wasm"/* 5 */;
     |                                                ^
-  2 |"
+  2 |
+Cause: Unexpected token from"
 `;
 
 exports[`comments.js [flow] format 1`] = `
@@ -25,14 +27,16 @@ exports[`comments.js [meriyah] format 1`] = `
 "Import source must be string (1:51)
 > 1 | /* 0 */import /* 1 */module /* 2 */from /* 3 */from /* 4 */"./module.wasm"/* 5 */;
     |                                                   ^
-  2 |"
+  2 |
+Cause: [1:51]: Import source must be string"
 `;
 
 exports[`comments.js [typescript] format 1`] = `
 "';' expected. (1:60)
 > 1 | /* 0 */import /* 1 */module /* 2 */from /* 3 */from /* 4 */"./module.wasm"/* 5 */;
     |                                                            ^
-  2 |"
+  2 |
+Cause: ';' expected."
 `;
 
 exports[`comments.js format 1`] = `
@@ -53,14 +57,16 @@ exports[`import-reflection.js [acorn] format 1`] = `
 "Unexpected token (1:15)
 > 1 | import module foo from "./module.wasm";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`import-reflection.js [espree] format 1`] = `
 "Unexpected token foo (1:15)
 > 1 | import module foo from "./module.wasm";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token foo"
 `;
 
 exports[`import-reflection.js [flow] format 1`] = `
@@ -74,14 +80,16 @@ exports[`import-reflection.js [meriyah] format 1`] = `
 "Import source must be string (1:17)
 > 1 | import module foo from "./module.wasm";
     |                 ^
-  2 |"
+  2 |
+Cause: [1:17]: Import source must be string"
 `;
 
 exports[`import-reflection.js [typescript] format 1`] = `
 "'=' expected. (1:15)
 > 1 | import module foo from "./module.wasm";
     |               ^
-  2 |"
+  2 |
+Cause: '=' expected."
 `;
 
 exports[`import-reflection.js format 1`] = `
@@ -103,7 +111,8 @@ exports[`valid-default-import.mjs [acorn] format 1`] = `
 > 1 | import module foo from "./module.wasm";
     |               ^
   2 | import bar from "./module.wasm";
-  3 |"
+  3 |
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`valid-default-import.mjs [espree] format 1`] = `
@@ -111,7 +120,8 @@ exports[`valid-default-import.mjs [espree] format 1`] = `
 > 1 | import module foo from "./module.wasm";
     |               ^
   2 | import bar from "./module.wasm";
-  3 |"
+  3 |
+Cause: Unexpected token foo"
 `;
 
 exports[`valid-default-import.mjs [flow] format 1`] = `
@@ -127,7 +137,8 @@ exports[`valid-default-import.mjs [meriyah] format 1`] = `
 > 1 | import module foo from "./module.wasm";
     |                 ^
   2 | import bar from "./module.wasm";
-  3 |"
+  3 |
+Cause: [1:17]: Import source must be string"
 `;
 
 exports[`valid-default-import.mjs [typescript] format 1`] = `
@@ -135,7 +146,8 @@ exports[`valid-default-import.mjs [typescript] format 1`] = `
 > 1 | import module foo from "./module.wasm";
     |               ^
   2 | import bar from "./module.wasm";
-  3 |"
+  3 |
+Cause: '=' expected."
 `;
 
 exports[`valid-default-import.mjs format 1`] = `
@@ -158,14 +170,16 @@ exports[`valid-from-as-default-module-binding.mjs [acorn] format 1`] = `
 "Unexpected token (1:20)
 > 1 | import module from from "./module.wasm";
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:19)"
 `;
 
 exports[`valid-from-as-default-module-binding.mjs [espree] format 1`] = `
 "Unexpected token from (1:20)
 > 1 | import module from from "./module.wasm";
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token from"
 `;
 
 exports[`valid-from-as-default-module-binding.mjs [flow] format 1`] = `
@@ -179,14 +193,16 @@ exports[`valid-from-as-default-module-binding.mjs [meriyah] format 1`] = `
 "Import source must be string (1:23)
 > 1 | import module from from "./module.wasm";
     |                       ^
-  2 |"
+  2 |
+Cause: [1:23]: Import source must be string"
 `;
 
 exports[`valid-from-as-default-module-binding.mjs [typescript] format 1`] = `
 "';' expected. (1:25)
 > 1 | import module from from "./module.wasm";
     |                         ^
-  2 |"
+  2 |
+Cause: ';' expected."
 `;
 
 exports[`valid-from-as-default-module-binding.mjs format 1`] = `
@@ -207,14 +223,16 @@ exports[`valid-from-as-default-module-binding-escaped.mjs [acorn] format 1`] = `
 "Unexpected token (1:15)
 > 1 | import module \\u0066rom from "./module.wasm";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`valid-from-as-default-module-binding-escaped.mjs [espree] format 1`] = `
 "Unexpected token \\u0066rom (1:15)
 > 1 | import module \\u0066rom from "./module.wasm";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token \\u0066rom"
 `;
 
 exports[`valid-from-as-default-module-binding-escaped.mjs [flow] format 1`] = `
@@ -228,14 +246,16 @@ exports[`valid-from-as-default-module-binding-escaped.mjs [meriyah] format 1`] =
 "Import source must be string (1:17)
 > 1 | import module \\u0066rom from "./module.wasm";
     |                 ^
-  2 |"
+  2 |
+Cause: [1:17]: Import source must be string"
 `;
 
 exports[`valid-from-as-default-module-binding-escaped.mjs [typescript] format 1`] = `
 "Keywords cannot contain escape characters. (1:15)
 > 1 | import module \\u0066rom from "./module.wasm";
     |               ^
-  2 |"
+  2 |
+Cause: Keywords cannot contain escape characters."
 `;
 
 exports[`valid-from-as-default-module-binding-escaped.mjs format 1`] = `

tests/format/js/invalid-code/__snapshots__/jsfmt.spec.js.snap

@@ -4,14 +4,16 @@ exports[`duplicate_bindings.js [acorn] format 1`] = `
 "Identifier 'A' has already been declared (1:19)
 > 1 | class A{}   class A{}
     |                   ^
-  2 |"
+  2 |
+Cause: Identifier 'A' has already been declared (1:18)"
 `;
 
 exports[`duplicate_bindings.js [espree] format 1`] = `
 "Identifier 'A' has already been declared (1:19)
 > 1 | class A{}   class A{}
     |                   ^
-  2 |"
+  2 |
+Cause: Identifier 'A' has already been declared"
 `;
 
 exports[`duplicate_bindings.js format 1`] = `

tests/format/js/method-chain/__snapshots__/jsfmt.spec.js.snap

@@ -1553,7 +1553,8 @@ exports[`tuple-and-record.js [acorn] format 1`] = `
     |                ^
   3 |
   4 | foo.a().b().c({n, o})
-  5 | foo.a().b().c(#{n, o})"
+  5 | foo.a().b().c(#{n, o})
+Cause: Unexpected character '[' (2:15)"
 `;
 
 exports[`tuple-and-record.js [espree] format 1`] = `
@@ -1563,7 +1564,8 @@ exports[`tuple-and-record.js [espree] format 1`] = `
     |                ^
   3 |
   4 | foo.a().b().c({n, o})
-  5 | foo.a().b().c(#{n, o})"
+  5 | foo.a().b().c(#{n, o})
+Cause: Unexpected character '['"
 `;
 
 exports[`tuple-and-record.js [flow] format 1`] = `
@@ -1583,7 +1585,8 @@ exports[`tuple-and-record.js [meriyah] format 1`] = `
     |               ^
   3 |
   4 | foo.a().b().c({n, o})
-  5 | foo.a().b().c(#{n, o})"
+  5 | foo.a().b().c(#{n, o})
+Cause: [2:15]: '#' not followed by identifier"
 `;
 
 exports[`tuple-and-record.js [typescript] format 1`] = `
@@ -1593,7 +1596,8 @@ exports[`tuple-and-record.js [typescript] format 1`] = `
     |               ^
   3 |
   4 | foo.a().b().c({n, o})
-  5 | foo.a().b().c(#{n, o})"
+  5 | foo.a().b().c(#{n, o})
+Cause: Invalid character."
 `;
 
 exports[`tuple-and-record.js format 1`] = `

tests/format/js/module-blocks/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`comments.js [acorn] format 1`] = `
     |                                ^
   2 |   /*A4*/
   3 |   export const foo = "foo";
-  4 |   export { foo }; /*A5*/"
+  4 |   export { foo }; /*A5*/
+Cause: Unexpected token (1:31)"
 `;
 
 exports[`comments.js [espree] format 1`] = `
@@ -15,7 +16,8 @@ exports[`comments.js [espree] format 1`] = `
     |                                ^
   2 |   /*A4*/
   3 |   export const foo = "foo";
-  4 |   export { foo }; /*A5*/"
+  4 |   export { foo }; /*A5*/
+Cause: Unexpected token {"
 `;
 
 exports[`comments.js [meriyah] format 1`] = `
@@ -24,7 +26,8 @@ exports[`comments.js [meriyah] format 1`] = `
     |                                ^
   2 |   /*A4*/
   3 |   export const foo = "foo";
-  4 |   export { foo }; /*A5*/"
+  4 |   export { foo }; /*A5*/
+Cause: [1:32]: Unexpected token: '{'"
 `;
 
 exports[`comments.js format 1`] = `
@@ -67,7 +70,8 @@ exports[`module-blocks.js [acorn] format 1`] = `
     |        ^
   2 |
   3 | class B {
-  4 |   #p() {"
+  4 |   #p() {
+Cause: Unexpected token (1:7)"
 `;
 
 exports[`module-blocks.js [espree] format 1`] = `
@@ -76,7 +80,8 @@ exports[`module-blocks.js [espree] format 1`] = `
     |        ^
   2 |
   3 | class B {
-  4 |   #p() {"
+  4 |   #p() {
+Cause: Unexpected token {"
 `;
 
 exports[`module-blocks.js [meriyah] format 1`] = `
@@ -85,7 +90,8 @@ exports[`module-blocks.js [meriyah] format 1`] = `
     |        ^
   2 |
   3 | class B {
-  4 |   #p() {"
+  4 |   #p() {
+Cause: [1:8]: Unexpected token: '{'"
 `;
 
 exports[`module-blocks.js format 1`] = `
@@ -211,7 +217,8 @@ exports[`range.js [acorn] format 1`] = `
     |                          ^
   2 | };
   3 |
-  4 | foo(module { export let foo = "foo"; })"
+  4 | foo(module { export let foo = "foo"; })
+Cause: Unexpected token (1:25)"
 `;
 
 exports[`range.js [espree] format 1`] = `
@@ -220,7 +227,8 @@ exports[`range.js [espree] format 1`] = `
     |                          ^
   2 | };
   3 |
-  4 | foo(module { export let foo = "foo"; })"
+  4 | foo(module { export let foo = "foo"; })
+Cause: Unexpected token {"
 `;
 
 exports[`range.js [meriyah] format 1`] = `
@@ -229,7 +237,8 @@ exports[`range.js [meriyah] format 1`] = `
     |                          ^
   2 | };
   3 |
-  4 | foo(module { export let foo = "foo"; })"
+  4 | foo(module { export let foo = "foo"; })
+Cause: [1:26]: Unexpected token: '{'"
 `;
 
 exports[`range.js format 1`] = `
@@ -267,7 +276,8 @@ exports[`worker.js [acorn] format 1`] = `
     |                                ^
   2 |   onmessage = function({data}) {
   3 |     let mod = import(data);
-  4 |     postMessage(mod.fn());"
+  4 |     postMessage(mod.fn());
+Cause: Unexpected token (1:31)"
 `;
 
 exports[`worker.js [espree] format 1`] = `
@@ -276,7 +286,8 @@ exports[`worker.js [espree] format 1`] = `
     |                                ^
   2 |   onmessage = function({data}) {
   3 |     let mod = import(data);
-  4 |     postMessage(mod.fn());"
+  4 |     postMessage(mod.fn());
+Cause: Unexpected token {"
 `;
 
 exports[`worker.js [meriyah] format 1`] = `
@@ -285,7 +296,8 @@ exports[`worker.js [meriyah] format 1`] = `
     |                                ^
   2 |   onmessage = function({data}) {
   3 |     let mod = import(data);
-  4 |     postMessage(mod.fn());"
+  4 |     postMessage(mod.fn());
+Cause: [1:32]: Expected ')'"
 `;
 
 exports[`worker.js format 1`] = `

tests/format/js/module-string-names/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`module-string-names-export.js [meriyah] format 1`] = `
     |                          ^
   2 | export { "smile" as smile2 } from "./emojis.js";
   3 | export { "smile" as "smile3" } from "./emojis.js";
-  4 | export { foo1, bar as "foo2" } from "./emojis.js";"
+  4 | export { foo1, bar as "foo2" } from "./emojis.js";
+Cause: [1:26]: Only a identifier can be used to indicate alias"
 `;
 
 exports[`module-string-names-export.js format 1`] = `
@@ -42,7 +43,8 @@ exports[`module-string-names-import.js [meriyah] format 1`] = `
     |                  ^
   2 | import { "foo" as bar, "default" as qux } from "module-a";
   3 | import { "學而時習之，不亦說乎？" as quotation2 } from "Confucius";
-  4 |"
+  4 |
+Cause: [1:18]: Expected '}'"
 `;
 
 exports[`module-string-names-import.js format 1`] = `

tests/format/js/multiparser-invalid/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`text.js [acorn] format 1`] = `
     |                  ^
   7 | foo = /* GraphQL */\`\\u{prettier}\\u{0065}\`;
   8 |
-  9 | foo = foo\`\\u{prettier}\${foo}pr\\u{0065}ttier\`;"
+  9 | foo = foo\`\\u{prettier}\${foo}pr\\u{0065}ttier\`;
+Cause: Bad escape sequence in untagged template literal (6:17)"
 `;
 
 exports[`text.js [espree] format 1`] = `
@@ -19,7 +20,8 @@ exports[`text.js [espree] format 1`] = `
     |                  ^
   7 | foo = /* GraphQL */\`\\u{prettier}\\u{0065}\`;
   8 |
-  9 | foo = foo\`\\u{prettier}\${foo}pr\\u{0065}ttier\`;"
+  9 | foo = foo\`\\u{prettier}\${foo}pr\\u{0065}ttier\`;
+Cause: Bad escape sequence in untagged template literal"
 `;
 
 exports[`text.js [flow] format 1`] = `
@@ -39,7 +41,8 @@ exports[`text.js [meriyah] format 1`] = `
     |                    ^
   7 | foo = /* GraphQL */\`\\u{prettier}\\u{0065}\`;
   8 |
-  9 | foo = foo\`\\u{prettier}\${foo}pr\\u{0065}ttier\`;"
+  9 | foo = foo\`\\u{prettier}\${foo}pr\\u{0065}ttier\`;
+Cause: [6:20]: Invalid hexadecimal escape sequence"
 `;
 
 exports[`text.js [typescript] format 1`] = `
@@ -50,7 +53,8 @@ exports[`text.js [typescript] format 1`] = `
     |                     ^
   7 | foo = /* GraphQL */\`\\u{prettier}\\u{0065}\`;
   8 |
-  9 | foo = foo\`\\u{prettier}\${foo}pr\\u{0065}ttier\`;"
+  9 | foo = foo\`\\u{prettier}\${foo}pr\\u{0065}ttier\`;
+Cause: Hexadecimal digit expected."
 `;
 
 exports[`text.js format 1`] = `

tests/format/js/new-target/__snapshots__/jsfmt.spec.js.snap

@@ -4,14 +4,16 @@ exports[`outside-functions.js [acorn] format 1`] = `
 "'new.target' can only be used in functions and class static block (1:11)
 > 1 | const x = new.target;
     |           ^
-  2 |"
+  2 |
+Cause: 'new.target' can only be used in functions and class static block (1:10)"
 `;
 
 exports[`outside-functions.js [espree] format 1`] = `
 "'new.target' can only be used in functions and class static block (1:11)
 > 1 | const x = new.target;
     |           ^
-  2 |"
+  2 |
+Cause: 'new.target' can only be used in functions and class static block"
 `;
 
 exports[`outside-functions.js [flow] format 1`] = `
@@ -25,7 +27,8 @@ exports[`outside-functions.js [meriyah] format 1`] = `
 "new.target only allowed within functions (1:20)
 > 1 | const x = new.target;
     |                    ^
-  2 |"
+  2 |
+Cause: [1:20]: new.target only allowed within functions"
 `;
 
 exports[`outside-functions.js format 1`] = `
@@ -46,14 +49,16 @@ exports[`range.js [acorn] format 1`] = `
 "'new.target' can only be used in functions and class static block (2:1)
   1 | const x =
 > 2 | new.target;
-    | ^"
+    | ^
+Cause: 'new.target' can only be used in functions and class static block (2:0)"
 `;
 
 exports[`range.js [espree] format 1`] = `
 "'new.target' can only be used in functions and class static block (2:1)
   1 | const x =
 > 2 | new.target;
-    | ^"
+    | ^
+Cause: 'new.target' can only be used in functions and class static block"
 `;
 
 exports[`range.js [flow] format 1`] = `
@@ -67,7 +72,8 @@ exports[`range.js [meriyah] format 1`] = `
 "new.target only allowed within functions (2:10)
   1 | const x =
 > 2 | new.target;
-    |          ^"
+    |          ^
+Cause: [2:10]: new.target only allowed within functions"
 `;
 
 exports[`range.js format 1`] = `

tests/format/js/no-semi-babylon-extensions/__snapshots__/jsfmt.spec.js.snap

@@ -7,7 +7,8 @@ exports[`no-semi.js [acorn] format 1`] = `
     |  ^
   3 |
   4 | class A {
-  5 |   a = b;"
+  5 |   a = b;
+Cause: Unexpected token (2:1)"
 `;
 
 exports[`no-semi.js [espree] format 1`] = `
@@ -17,7 +18,8 @@ exports[`no-semi.js [espree] format 1`] = `
     |  ^
   3 |
   4 | class A {
-  5 |   a = b;"
+  5 |   a = b;
+Cause: Unexpected token :"
 `;
 
 exports[`no-semi.js [meriyah] format 1`] = `
@@ -27,7 +29,8 @@ exports[`no-semi.js [meriyah] format 1`] = `
     |  ^
   3 |
   4 | class A {
-  5 |   a = b;"
+  5 |   a = b;
+Cause: [2:2]: Unexpected token: ':'"
 `;
 
 exports[`no-semi.js - {"semi":false} [acorn] format 1`] = `
@@ -37,7 +40,8 @@ exports[`no-semi.js - {"semi":false} [acorn] format 1`] = `
     |  ^
   3 |
   4 | class A {
-  5 |   a = b;"
+  5 |   a = b;
+Cause: Unexpected token (2:1)"
 `;
 
 exports[`no-semi.js - {"semi":false} [espree] format 1`] = `
@@ -47,7 +51,8 @@ exports[`no-semi.js - {"semi":false} [espree] format 1`] = `
     |  ^
   3 |
   4 | class A {
-  5 |   a = b;"
+  5 |   a = b;
+Cause: Unexpected token :"
 `;
 
 exports[`no-semi.js - {"semi":false} [meriyah] format 1`] = `
@@ -57,7 +62,8 @@ exports[`no-semi.js - {"semi":false} [meriyah] format 1`] = `
     |  ^
   3 |
   4 | class A {
-  5 |   a = b;"
+  5 |   a = b;
+Cause: [2:2]: Unexpected token: ':'"
 `;
 
 exports[`no-semi.js - {"semi":false} format 1`] = `

tests/format/js/non-strict/__snapshots__/jsfmt.spec.js.snap

@@ -48,7 +48,8 @@ exports[`octal-number.js [typescript] format 1`] = `
 "Octal literals are not allowed. Use the syntax '0o777'. (1:1)
 > 1 | 0777
     | ^
-  2 |"
+  2 |
+Cause: Octal literals are not allowed. Use the syntax '0o777'."
 `;
 
 exports[`octal-number.js format 1`] = `

tests/format/js/numeric-separators/__snapshots__/jsfmt.spec.js.snap

@@ -7,7 +7,8 @@ exports[`number.js [typescript] format 1`] = `
 > 3 | a = 09e1_1;
     |     ^
   4 | a = 09.1_1;
-  5 |"
+  5 |
+Cause: Decimals with leading zeros are not allowed."
 `;
 
 exports[`number.js format 1`] = `

tests/format/js/objects/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`bigint-key.js [typescript] format 1`] = `
     |      ^
   2 | a = {1n() {}}
   3 | a = {get 1n() {}}
-  4 |"
+  4 |
+Cause: Property assignment expected."
 `;
 
 exports[`bigint-key.js format 1`] = `
@@ -87,7 +88,8 @@ exports[`expression.js [acorn] format 1`] = `
     |    ^
   6 | ({}::b()\`\`[''].c++ && 0 ? 0 : 0, 0);
   7 | ({}(), 0);
-  8 | ({} = 0);"
+  8 | ({} = 0);
+Cause: Unexpected token (5:3)"
 `;
 
 exports[`expression.js [espree] format 1`] = `
@@ -98,7 +100,8 @@ exports[`expression.js [espree] format 1`] = `
     |    ^
   6 | ({}::b()\`\`[''].c++ && 0 ? 0 : 0, 0);
   7 | ({}(), 0);
-  8 | ({} = 0);"
+  8 | ({} = 0);
+Cause: Unexpected token :"
 `;
 
 exports[`expression.js [flow] format 1`] = `
@@ -120,7 +123,8 @@ exports[`expression.js [meriyah] format 1`] = `
     |    ^
   6 | ({}::b()\`\`[''].c++ && 0 ? 0 : 0, 0);
   7 | ({}(), 0);
-  8 | ({} = 0);"
+  8 | ({} = 0);
+Cause: [5:4]: Expected ')'"
 `;
 
 exports[`expression.js [typescript] format 1`] = `
@@ -131,7 +135,8 @@ exports[`expression.js [typescript] format 1`] = `
     |    ^
   6 | ({}::b()\`\`[''].c++ && 0 ? 0 : 0, 0);
   7 | ({}(), 0);
-  8 | ({} = 0);"
+  8 | ({} = 0);
+Cause: ')' expected."
 `;
 
 exports[`expression.js format 1`] = `

tests/format/js/optional-chaining-assignment/__snapshots__/jsfmt.spec.js.snap

@@ -4,350 +4,400 @@ exports[`invalid-destructuring-arr.js [__babel_estree] format 1`] = `
 "Invalid optional chaining in the left-hand side of array destructuring pattern. (1:2)
 > 1 | [a?.b] = [];
     |  ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of array destructuring pattern. (1:1)"
 `;
 
 exports[`invalid-destructuring-arr.js [acorn] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:2)
 > 1 | [a?.b] = [];
     |  ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side (1:1)"
 `;
 
 exports[`invalid-destructuring-arr.js [babel] format 1`] = `
 "Invalid optional chaining in the left-hand side of array destructuring pattern. (1:2)
 > 1 | [a?.b] = [];
     |  ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of array destructuring pattern. (1:1)"
 `;
 
 exports[`invalid-destructuring-arr.js [espree] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:2)
 > 1 | [a?.b] = [];
     |  ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side"
 `;
 
 exports[`invalid-destructuring-arr.js [meriyah] format 1`] = `
 "Invalid left-hand side in assignment (1:10)
 > 1 | [a?.b] = [];
     |          ^
-  2 |"
+  2 |
+Cause: [1:10]: Invalid left-hand side in assignment"
 `;
 
 exports[`invalid-destructuring-obj.js [__babel_estree] format 1`] = `
 "Invalid optional chaining in the left-hand side of object destructuring pattern. (1:10)
 > 1 | ({ prop: a?.b } = {});
     |          ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of object destructuring pattern. (1:9)"
 `;
 
 exports[`invalid-destructuring-obj.js [acorn] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:10)
 > 1 | ({ prop: a?.b } = {});
     |          ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side (1:9)"
 `;
 
 exports[`invalid-destructuring-obj.js [babel] format 1`] = `
 "Invalid optional chaining in the left-hand side of object destructuring pattern. (1:10)
 > 1 | ({ prop: a?.b } = {});
     |          ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of object destructuring pattern. (1:9)"
 `;
 
 exports[`invalid-destructuring-obj.js [espree] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:10)
 > 1 | ({ prop: a?.b } = {});
     |          ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side"
 `;
 
 exports[`invalid-destructuring-obj.js [meriyah] format 1`] = `
 "Invalid left-hand side in assignment (1:19)
 > 1 | ({ prop: a?.b } = {});
     |                   ^
-  2 |"
+  2 |
+Cause: [1:19]: Invalid left-hand side in assignment"
 `;
 
 exports[`invalid-fn-param.js [__babel_estree] format 1`] = `
 "Unexpected token, expected "," (1:13)
 > 1 | function f(a?.b) {}
     |             ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "," (1:12)"
 `;
 
 exports[`invalid-fn-param.js [acorn] format 1`] = `
 "Unexpected token (1:13)
 > 1 | function f(a?.b) {}
     |             ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:12)"
 `;
 
 exports[`invalid-fn-param.js [babel] format 1`] = `
 "Unexpected token, expected "," (1:13)
 > 1 | function f(a?.b) {}
     |             ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "," (1:12)"
 `;
 
 exports[`invalid-fn-param.js [espree] format 1`] = `
 "Unexpected token ?. (1:13)
 > 1 | function f(a?.b) {}
     |             ^
-  2 |"
+  2 |
+Cause: Unexpected token ?."
 `;
 
 exports[`invalid-fn-param.js [meriyah] format 1`] = `
 "Expected ')' (1:14)
 > 1 | function f(a?.b) {}
     |              ^
-  2 |"
+  2 |
+Cause: [1:14]: Expected ')'"
 `;
 
 exports[`invalid-fn-param-arrow.js [__babel_estree] format 1`] = `
 "Invalid optional chaining in the left-hand side of function parameter list. (1:2)
 > 1 | (a?.b) => {}
     |  ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of function parameter list. (1:1)"
 `;
 
 exports[`invalid-fn-param-arrow.js [acorn] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:2)
 > 1 | (a?.b) => {}
     |  ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side (1:1)"
 `;
 
 exports[`invalid-fn-param-arrow.js [babel] format 1`] = `
 "Invalid optional chaining in the left-hand side of function parameter list. (1:2)
 > 1 | (a?.b) => {}
     |  ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of function parameter list. (1:1)"
 `;
 
 exports[`invalid-fn-param-arrow.js [espree] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:2)
 > 1 | (a?.b) => {}
     |  ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side"
 `;
 
 exports[`invalid-fn-param-arrow.js [meriyah] format 1`] = `
 "The left-hand side of the arrow can only be destructed through assignment (1:9)
 > 1 | (a?.b) => {}
     |         ^
-  2 |"
+  2 |
+Cause: [1:9]: The left-hand side of the arrow can only be destructed through assignment"
 `;
 
 exports[`invalid-fn-param-assign.js [__babel_estree] format 1`] = `
 "Unexpected token, expected "," (1:13)
 > 1 | function f(a?.b = c) {}
     |             ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "," (1:12)"
 `;
 
 exports[`invalid-fn-param-assign.js [acorn] format 1`] = `
 "Unexpected token (1:13)
 > 1 | function f(a?.b = c) {}
     |             ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:12)"
 `;
 
 exports[`invalid-fn-param-assign.js [babel] format 1`] = `
 "Unexpected token, expected "," (1:13)
 > 1 | function f(a?.b = c) {}
     |             ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "," (1:12)"
 `;
 
 exports[`invalid-fn-param-assign.js [espree] format 1`] = `
 "Unexpected token ?. (1:13)
 > 1 | function f(a?.b = c) {}
     |             ^
-  2 |"
+  2 |
+Cause: Unexpected token ?."
 `;
 
 exports[`invalid-fn-param-assign.js [meriyah] format 1`] = `
 "Expected ')' (1:14)
 > 1 | function f(a?.b = c) {}
     |              ^
-  2 |"
+  2 |
+Cause: [1:14]: Expected ')'"
 `;
 
 exports[`invalid-for-await-of.js [__babel_estree] format 1`] = `
 "Invalid optional chaining in the left-hand side of for-of statement. (1:6)
 > 1 | for (a?.b of x);
     |      ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of for-of statement. (1:5)"
 `;
 
 exports[`invalid-for-await-of.js [acorn] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:6)
 > 1 | for (a?.b of x);
     |      ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side (1:5)"
 `;
 
 exports[`invalid-for-await-of.js [babel] format 1`] = `
 "Invalid optional chaining in the left-hand side of for-of statement. (1:6)
 > 1 | for (a?.b of x);
     |      ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of for-of statement. (1:5)"
 `;
 
 exports[`invalid-for-await-of.js [espree] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:6)
 > 1 | for (a?.b of x);
     |      ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side"
 `;
 
 exports[`invalid-for-await-of.js [meriyah] format 1`] = `
 "Invalid left-hand side in for-of (1:12)
 > 1 | for (a?.b of x);
     |            ^
-  2 |"
+  2 |
+Cause: [1:12]: Invalid left-hand side in for-of"
 `;
 
 exports[`invalid-for-in.js [__babel_estree] format 1`] = `
 "Invalid optional chaining in the left-hand side of for-in statement. (1:6)
 > 1 | for (a?.b in x);
     |      ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of for-in statement. (1:5)"
 `;
 
 exports[`invalid-for-in.js [acorn] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:6)
 > 1 | for (a?.b in x);
     |      ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side (1:5)"
 `;
 
 exports[`invalid-for-in.js [babel] format 1`] = `
 "Invalid optional chaining in the left-hand side of for-in statement. (1:6)
 > 1 | for (a?.b in x);
     |      ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of for-in statement. (1:5)"
 `;
 
 exports[`invalid-for-in.js [espree] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:6)
 > 1 | for (a?.b in x);
     |      ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side"
 `;
 
 exports[`invalid-for-in.js [meriyah] format 1`] = `
 "Invalid left-hand side in for-in (1:12)
 > 1 | for (a?.b in x);
     |            ^
-  2 |"
+  2 |
+Cause: [1:12]: Invalid left-hand side in for-in"
 `;
 
 exports[`invalid-for-of.js [__babel_estree] format 1`] = `
 "Invalid optional chaining in the left-hand side of for-of statement. (1:6)
 > 1 | for (a?.b of x);
     |      ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of for-of statement. (1:5)"
 `;
 
 exports[`invalid-for-of.js [acorn] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:6)
 > 1 | for (a?.b of x);
     |      ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side (1:5)"
 `;
 
 exports[`invalid-for-of.js [babel] format 1`] = `
 "Invalid optional chaining in the left-hand side of for-of statement. (1:6)
 > 1 | for (a?.b of x);
     |      ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of for-of statement. (1:5)"
 `;
 
 exports[`invalid-for-of.js [espree] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:6)
 > 1 | for (a?.b of x);
     |      ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side"
 `;
 
 exports[`invalid-for-of.js [meriyah] format 1`] = `
 "Invalid left-hand side in for-of (1:12)
 > 1 | for (a?.b of x);
     |            ^
-  2 |"
+  2 |
+Cause: [1:12]: Invalid left-hand side in for-of"
 `;
 
 exports[`invalid-inc-postfix.js [__babel_estree] format 1`] = `
 "Invalid optional chaining in the left-hand side of postfix operation. (1:1)
 > 1 | a?.b++;
     | ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of postfix operation. (1:0)"
 `;
 
 exports[`invalid-inc-postfix.js [acorn] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:1)
 > 1 | a?.b++;
     | ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side (1:0)"
 `;
 
 exports[`invalid-inc-postfix.js [babel] format 1`] = `
 "Invalid optional chaining in the left-hand side of postfix operation. (1:1)
 > 1 | a?.b++;
     | ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of postfix operation. (1:0)"
 `;
 
 exports[`invalid-inc-postfix.js [espree] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:1)
 > 1 | a?.b++;
     | ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side"
 `;
 
 exports[`invalid-inc-postfix.js [meriyah] format 1`] = `
 "Invalid increment/decrement operand (1:6)
 > 1 | a?.b++;
     |      ^
-  2 |"
+  2 |
+Cause: [1:6]: Invalid increment/decrement operand"
 `;
 
 exports[`invalid-inc-prefix.js [__babel_estree] format 1`] = `
 "Invalid optional chaining in the left-hand side of prefix operation. (1:3)
 > 1 | ++a?.b;
     |   ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of prefix operation. (1:2)"
 `;
 
 exports[`invalid-inc-prefix.js [acorn] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:3)
 > 1 | ++a?.b;
     |   ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side (1:2)"
 `;
 
 exports[`invalid-inc-prefix.js [babel] format 1`] = `
 "Invalid optional chaining in the left-hand side of prefix operation. (1:3)
 > 1 | ++a?.b;
     |   ^
-  2 |"
+  2 |
+Cause: Invalid optional chaining in the left-hand side of prefix operation. (1:2)"
 `;
 
 exports[`invalid-inc-prefix.js [espree] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:3)
 > 1 | ++a?.b;
     |   ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side"
 `;
 
 exports[`invalid-inc-prefix.js [meriyah] format 1`] = `
 "Invalid increment/decrement operand (1:7)
 > 1 | ++a?.b;
     |       ^
-  2 |"
+  2 |
+Cause: [1:7]: Invalid increment/decrement operand"
 `;
 
 exports[`valid-complex-case.js [acorn] format 1`] = `
@@ -355,7 +405,8 @@ exports[`valid-complex-case.js [acorn] format 1`] = `
 > 1 | let?.()[a] =1;
     | ^
   2 | let?.[a] = 1;
-  3 |"
+  3 |
+Cause: The keyword 'let' is reserved (1:0)"
 `;
 
 exports[`valid-complex-case.js [espree] format 1`] = `
@@ -363,7 +414,8 @@ exports[`valid-complex-case.js [espree] format 1`] = `
 > 1 | let?.()[a] =1;
     | ^
   2 | let?.[a] = 1;
-  3 |"
+  3 |
+Cause: The keyword 'let' is reserved"
 `;
 
 exports[`valid-complex-case.js [meriyah] format 1`] = `
@@ -371,7 +423,8 @@ exports[`valid-complex-case.js [meriyah] format 1`] = `
 > 1 | let?.()[a] =1;
     |     ^
   2 | let?.[a] = 1;
-  3 |"
+  3 |
+Cause: [1:5]: \`let\` declaration not allowed here and \`let\` cannot be a regular var name in strict mode"
 `;
 
 exports[`valid-complex-case.js format 1`] = `
@@ -394,14 +447,16 @@ exports[`valid-lhs-eq.js [acorn] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:1)
 > 1 | a?.b.c = d;
     | ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side (1:0)"
 `;
 
 exports[`valid-lhs-eq.js [espree] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:1)
 > 1 | a?.b.c = d;
     | ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side"
 `;
 
 exports[`valid-lhs-eq.js format 1`] = `
@@ -422,14 +477,16 @@ exports[`valid-lhs-plus-eq.js [acorn] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:1)
 > 1 | a?.b.c += d;
     | ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side (1:0)"
 `;
 
 exports[`valid-lhs-plus-eq.js [espree] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:1)
 > 1 | a?.b.c += d;
     | ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side"
 `;
 
 exports[`valid-lhs-plus-eq.js format 1`] = `
@@ -450,21 +507,24 @@ exports[`valid-parenthesized.js [acorn] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:2)
 > 1 | (a?.b) = c;
     |  ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side (1:1)"
 `;
 
 exports[`valid-parenthesized.js [espree] format 1`] = `
 "Optional chaining cannot appear in left-hand side (1:2)
 > 1 | (a?.b) = c;
     |  ^
-  2 |"
+  2 |
+Cause: Optional chaining cannot appear in left-hand side"
 `;
 
 exports[`valid-parenthesized.js [meriyah] format 1`] = `
 "Invalid left-hand side in assignment (1:8)
 > 1 | (a?.b) = c;
     |        ^
-  2 |"
+  2 |
+Cause: [1:8]: Invalid left-hand side in assignment"
 `;
 
 exports[`valid-parenthesized.js format 1`] = `

tests/format/js/partial-application/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`test.js [acorn] format 1`] = `
     |                       ^
   2 | addOne(2); // 3
   3 |
-  4 | const addTen = add(?, 10); // apply from the right"
+  4 | const addTen = add(?, 10); // apply from the right
+Cause: Unexpected token (1:22)"
 `;
 
 exports[`test.js [espree] format 1`] = `
@@ -15,7 +16,8 @@ exports[`test.js [espree] format 1`] = `
     |                       ^
   2 | addOne(2); // 3
   3 |
-  4 | const addTen = add(?, 10); // apply from the right"
+  4 | const addTen = add(?, 10); // apply from the right
+Cause: Unexpected token ?"
 `;
 
 exports[`test.js [meriyah] format 1`] = `
@@ -24,7 +26,8 @@ exports[`test.js [meriyah] format 1`] = `
     |                       ^
   2 | addOne(2); // 3
   3 |
-  4 | const addTen = add(?, 10); // apply from the right"
+  4 | const addTen = add(?, 10); // apply from the right
+Cause: [1:23]: Unexpected token: '?'"
 `;
 
 exports[`test.js format 1`] = `

tests/format/js/pipeline-operator/__snapshots__/jsfmt.spec.js.snap

@@ -7,7 +7,8 @@ exports[`block-comments.js [acorn] format 1`] = `
     |  ^
   3 | |> foo2 /* comment1 */
   4 | |> foo3 /* comment2 */
-  5 | |> kochabCooieGameOnOboleUnweave"
+  5 | |> kochabCooieGameOnOboleUnweave
+Cause: Unexpected token (2:1)"
 `;
 
 exports[`block-comments.js [espree] format 1`] = `
@@ -17,7 +18,8 @@ exports[`block-comments.js [espree] format 1`] = `
     |  ^
   3 | |> foo2 /* comment1 */
   4 | |> foo3 /* comment2 */
-  5 | |> kochabCooieGameOnOboleUnweave"
+  5 | |> kochabCooieGameOnOboleUnweave
+Cause: Unexpected token >"
 `;
 
 exports[`block-comments.js [meriyah] format 1`] = `
@@ -27,7 +29,8 @@ exports[`block-comments.js [meriyah] format 1`] = `
     |  ^
   3 | |> foo2 /* comment1 */
   4 | |> foo3 /* comment2 */
-  5 | |> kochabCooieGameOnOboleUnweave"
+  5 | |> kochabCooieGameOnOboleUnweave
+Cause: [2:2]: Unexpected token: '>'"
 `;
 
 exports[`block-comments.js format 1`] = `
@@ -61,7 +64,8 @@ exports[`fsharp_style_pipeline_operator.js [acorn] format 1`] = `
     |    ^
   3 |   |> x => doubleSay(x, ', ')
   4 |   |> capitalize
-  5 |   |> x => x + '!'"
+  5 |   |> x => x + '!'
+Cause: Unexpected token (2:3)"
 `;
 
 exports[`fsharp_style_pipeline_operator.js [espree] format 1`] = `
@@ -71,7 +75,8 @@ exports[`fsharp_style_pipeline_operator.js [espree] format 1`] = `
     |    ^
   3 |   |> x => doubleSay(x, ', ')
   4 |   |> capitalize
-  5 |   |> x => x + '!'"
+  5 |   |> x => x + '!'
+Cause: Unexpected token >"
 `;
 
 exports[`fsharp_style_pipeline_operator.js [meriyah] format 1`] = `
@@ -81,7 +86,8 @@ exports[`fsharp_style_pipeline_operator.js [meriyah] format 1`] = `
     |    ^
   3 |   |> x => doubleSay(x, ', ')
   4 |   |> capitalize
-  5 |   |> x => x + '!'"
+  5 |   |> x => x + '!'
+Cause: [2:4]: Unexpected token: '>'"
 `;
 
 exports[`fsharp_style_pipeline_operator.js format 1`] = `
@@ -185,7 +191,8 @@ exports[`hack_pipeline_operator.js [acorn] format 1`] = `
     |    ^
   2 |
   3 | foo
-  4 |   |> await %"
+  4 |   |> await %
+Cause: Unexpected token (1:3)"
 `;
 
 exports[`hack_pipeline_operator.js [espree] format 1`] = `
@@ -194,7 +201,8 @@ exports[`hack_pipeline_operator.js [espree] format 1`] = `
     |    ^
   2 |
   3 | foo
-  4 |   |> await %"
+  4 |   |> await %
+Cause: Unexpected token >"
 `;
 
 exports[`hack_pipeline_operator.js [meriyah] format 1`] = `
@@ -203,7 +211,8 @@ exports[`hack_pipeline_operator.js [meriyah] format 1`] = `
     |    ^
   2 |
   3 | foo
-  4 |   |> await %"
+  4 |   |> await %
+Cause: [1:4]: Unexpected token: '>'"
 `;
 
 exports[`hack_pipeline_operator.js format 1`] = `
@@ -326,7 +335,8 @@ exports[`minimal_pipeline_operator.js [acorn] format 1`] = `
     |    ^
   2 |
   3 | a |> (b |> c);
-  4 |"
+  4 |
+Cause: Unexpected token (1:3)"
 `;
 
 exports[`minimal_pipeline_operator.js [espree] format 1`] = `
@@ -335,7 +345,8 @@ exports[`minimal_pipeline_operator.js [espree] format 1`] = `
     |    ^
   2 |
   3 | a |> (b |> c);
-  4 |"
+  4 |
+Cause: Unexpected token >"
 `;
 
 exports[`minimal_pipeline_operator.js [meriyah] format 1`] = `
@@ -344,7 +355,8 @@ exports[`minimal_pipeline_operator.js [meriyah] format 1`] = `
     |    ^
   2 |
   3 | a |> (b |> c);
-  4 |"
+  4 |
+Cause: [1:4]: Unexpected token: '>'"
 `;
 
 exports[`minimal_pipeline_operator.js format 1`] = `

tests/format/js/private-in/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`private-in.js [acorn] format 1`] = `
     |     ^
   2 | }
   3 |
-  4 | #prop in     obj;"
+  4 | #prop in     obj;
+Cause: Unexpected token (1:4)"
 `;
 
 exports[`private-in.js [espree] format 1`] = `
@@ -15,7 +16,8 @@ exports[`private-in.js [espree] format 1`] = `
     |     ^
   2 | }
   3 |
-  4 | #prop in     obj;"
+  4 | #prop in     obj;
+Cause: Unexpected token #prop"
 `;
 
 exports[`private-in.js format 1`] = `

tests/format/js/record/__snapshots__/jsfmt.spec.js.snap

@@ -7,7 +7,8 @@ exports[`computed.js [acorn] format 1`] = `
     |         ^
   3 | assert(#{ [key.toUpperCase()]: 1 } === #{ A: 1 })
   4 |
-  5 | assert(#{ [true]: 1 } === #{ true: 1 })"
+  5 | assert(#{ [true]: 1 } === #{ true: 1 })
+Cause: Unexpected character '{' (2:8)"
 `;
 
 exports[`computed.js [espree] format 1`] = `
@@ -17,7 +18,8 @@ exports[`computed.js [espree] format 1`] = `
     |         ^
   3 | assert(#{ [key.toUpperCase()]: 1 } === #{ A: 1 })
   4 |
-  5 | assert(#{ [true]: 1 } === #{ true: 1 })"
+  5 | assert(#{ [true]: 1 } === #{ true: 1 })
+Cause: Unexpected character '{'"
 `;
 
 exports[`computed.js [meriyah] format 1`] = `
@@ -27,7 +29,8 @@ exports[`computed.js [meriyah] format 1`] = `
     |        ^
   3 | assert(#{ [key.toUpperCase()]: 1 } === #{ A: 1 })
   4 |
-  5 | assert(#{ [true]: 1 } === #{ true: 1 })"
+  5 | assert(#{ [true]: 1 } === #{ true: 1 })
+Cause: [2:8]: '#' not followed by identifier"
 `;
 
 exports[`computed.js format 1`] = `
@@ -66,7 +69,8 @@ exports[`destructuring.js [acorn] format 1`] = `
     |                   ^
   2 | assert(a === 1);
   3 | assert(b === 2);
-  4 |"
+  4 |
+Cause: Unexpected character '{' (1:18)"
 `;
 
 exports[`destructuring.js [espree] format 1`] = `
@@ -75,7 +79,8 @@ exports[`destructuring.js [espree] format 1`] = `
     |                   ^
   2 | assert(a === 1);
   3 | assert(b === 2);
-  4 |"
+  4 |
+Cause: Unexpected character '{'"
 `;
 
 exports[`destructuring.js [meriyah] format 1`] = `
@@ -84,7 +89,8 @@ exports[`destructuring.js [meriyah] format 1`] = `
     |                  ^
   2 | assert(a === 1);
   3 | assert(b === 2);
-  4 |"
+  4 |
+Cause: [1:18]: '#' not followed by identifier"
 `;
 
 exports[`destructuring.js format 1`] = `
@@ -123,7 +129,8 @@ exports[`record.js [acorn] format 1`] = `
     |                  ^
   2 |     a: 1,
   3 |     b: 2,
-  4 |     c: 3,"
+  4 |     c: 3,
+Cause: Unexpected character '{' (1:17)"
 `;
 
 exports[`record.js [espree] format 1`] = `
@@ -132,7 +139,8 @@ exports[`record.js [espree] format 1`] = `
     |                  ^
   2 |     a: 1,
   3 |     b: 2,
-  4 |     c: 3,"
+  4 |     c: 3,
+Cause: Unexpected character '{'"
 `;
 
 exports[`record.js [meriyah] format 1`] = `
@@ -141,7 +149,8 @@ exports[`record.js [meriyah] format 1`] = `
     |                 ^
   2 |     a: 1,
   3 |     b: 2,
-  4 |     c: 3,"
+  4 |     c: 3,
+Cause: [1:17]: '#' not followed by identifier"
 `;
 
 exports[`record.js format 1`] = `
@@ -194,7 +203,8 @@ exports[`shorthand.js [acorn] format 1`] = `
 > 2 | const record = #{ url }
     |                 ^
   3 | console.log(record.url) // https://github.com/tc39/proposal-record-tuple
-  4 |"
+  4 |
+Cause: Unexpected character '{' (2:16)"
 `;
 
 exports[`shorthand.js [espree] format 1`] = `
@@ -203,7 +213,8 @@ exports[`shorthand.js [espree] format 1`] = `
 > 2 | const record = #{ url }
     |                 ^
   3 | console.log(record.url) // https://github.com/tc39/proposal-record-tuple
-  4 |"
+  4 |
+Cause: Unexpected character '{'"
 `;
 
 exports[`shorthand.js [meriyah] format 1`] = `
@@ -212,7 +223,8 @@ exports[`shorthand.js [meriyah] format 1`] = `
 > 2 | const record = #{ url }
     |                ^
   3 | console.log(record.url) // https://github.com/tc39/proposal-record-tuple
-  4 |"
+  4 |
+Cause: [2:16]: '#' not followed by identifier"
 `;
 
 exports[`shorthand.js format 1`] = `
@@ -239,7 +251,8 @@ exports[`spread.js [acorn] format 1`] = `
     |                   ^
   2 | const taskNow = #{ id: 42, status: "WIP", ...formData }
   3 | const taskLater = #{ ...taskNow, status: "DONE" }
-  4 |"
+  4 |
+Cause: Unexpected character '{' (1:18)"
 `;
 
 exports[`spread.js [espree] format 1`] = `
@@ -248,7 +261,8 @@ exports[`spread.js [espree] format 1`] = `
     |                   ^
   2 | const taskNow = #{ id: 42, status: "WIP", ...formData }
   3 | const taskLater = #{ ...taskNow, status: "DONE" }
-  4 |"
+  4 |
+Cause: Unexpected character '{'"
 `;
 
 exports[`spread.js [meriyah] format 1`] = `
@@ -257,7 +271,8 @@ exports[`spread.js [meriyah] format 1`] = `
     |                  ^
   2 | const taskNow = #{ id: 42, status: "WIP", ...formData }
   3 | const taskLater = #{ ...taskNow, status: "DONE" }
-  4 |"
+  4 |
+Cause: [1:18]: '#' not followed by identifier"
 `;
 
 exports[`spread.js format 1`] = `
@@ -290,7 +305,8 @@ exports[`syntax.js [acorn] format 1`] = `
     |  ^
   2 | #{ a: 1, b: 2 }
   3 | #{ a: 1, b: #[2, 3, #{ c: 4 }] }
-  4 |"
+  4 |
+Cause: Unexpected character '{' (1:1)"
 `;
 
 exports[`syntax.js [espree] format 1`] = `
@@ -299,7 +315,8 @@ exports[`syntax.js [espree] format 1`] = `
     |  ^
   2 | #{ a: 1, b: 2 }
   3 | #{ a: 1, b: #[2, 3, #{ c: 4 }] }
-  4 |"
+  4 |
+Cause: Unexpected character '{'"
 `;
 
 exports[`syntax.js [meriyah] format 1`] = `
@@ -308,7 +325,8 @@ exports[`syntax.js [meriyah] format 1`] = `
     | ^
   2 | #{ a: 1, b: 2 }
   3 | #{ a: 1, b: #[2, 3, #{ c: 4 }] }
-  4 |"
+  4 |
+Cause: [1:1]: '#' not followed by identifier"
 `;
 
 exports[`syntax.js format 1`] = `

tests/format/js/regex/__snapshots__/jsfmt.spec.js.snap

@@ -36,7 +36,8 @@ exports[`regexp-modifiers.js [acorn] format 1`] = `
     |  ^
   2 | /(?-ims:^[a-z].)(^[a-z].)/uims;
   3 | /(?ims:^[a-z].1$)/;
-  4 |"
+  4 |
+Cause: Invalid regular expression: /(?ims:^[a-z])/: Invalid group (1:1)"
 `;
 
 exports[`regexp-modifiers.js [espree] format 1`] = `
@@ -45,7 +46,8 @@ exports[`regexp-modifiers.js [espree] format 1`] = `
     |  ^
   2 | /(?-ims:^[a-z].)(^[a-z].)/uims;
   3 | /(?ims:^[a-z].1$)/;
-  4 |"
+  4 |
+Cause: Invalid regular expression: /(?ims:^[a-z])/: Invalid group"
 `;
 
 exports[`regexp-modifiers.js [meriyah] format 1`] = `
@@ -54,7 +56,8 @@ exports[`regexp-modifiers.js [meriyah] format 1`] = `
     |                ^
   2 | /(?-ims:^[a-z].)(^[a-z].)/uims;
   3 | /(?ims:^[a-z].1$)/;
-  4 |"
+  4 |
+Cause: [1:16]: Unterminated regular expression"
 `;
 
 exports[`regexp-modifiers.js format 1`] = `
@@ -100,7 +103,8 @@ exports[`v-flag.js [meriyah] format 1`] = `
 "Unexpected regular expression flag (1:3)
 > 1 | /a/v;
     |   ^
-  2 |"
+  2 |
+Cause: [1:3]: Unexpected regular expression flag"
 `;
 
 exports[`v-flag.js format 1`] = `

tests/format/js/sloppy-mode/__snapshots__/jsfmt.spec.js.snap

@@ -77,14 +77,16 @@ exports[`function-declaration-in-while.js [acorn] format 1`] = `
 "Unexpected token (1:15)
 > 1 | while (false) function foo(){}
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`function-declaration-in-while.js [espree] format 1`] = `
 "Unexpected token function (1:15)
 > 1 | while (false) function foo(){}
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token function"
 `;
 
 exports[`function-declaration-in-while.js [flow] format 1`] = `
@@ -98,7 +100,8 @@ exports[`function-declaration-in-while.js [meriyah] format 1`] = `
 "In strict mode code, functions can only be declared at top level or inside a block (1:22)
 > 1 | while (false) function foo(){}
     |                      ^
-  2 |"
+  2 |
+Cause: [1:22]: In strict mode code, functions can only be declared at top level or inside a block"
 `;
 
 exports[`function-declaration-in-while.js format 1`] = `

tests/format/js/source-phase-imports/__snapshots__/jsfmt.spec.js.snap

@@ -18,21 +18,24 @@ exports[`import-source.js [acorn] format 1`] = `
 "Unexpected token (1:15)
 > 1 | import source x from "x";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`import-source.js [espree] format 1`] = `
 "Unexpected token x (1:15)
 > 1 | import source x from "x";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token x"
 `;
 
 exports[`import-source.js [meriyah] format 1`] = `
 "Import source must be string (1:15)
 > 1 | import source x from "x";
     |               ^
-  2 |"
+  2 |
+Cause: [1:15]: Import source must be string"
 `;
 
 exports[`import-source.js format 1`] = `
@@ -53,21 +56,24 @@ exports[`import-source-attributes-declaration.js [acorn] format 1`] = `
 "Unexpected token (1:15)
 > 1 | import source s from "x" with { attr: "val" };
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`import-source-attributes-declaration.js [espree] format 1`] = `
 "Unexpected token s (1:15)
 > 1 | import source s from "x" with { attr: "val" };
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token s"
 `;
 
 exports[`import-source-attributes-declaration.js [meriyah] format 1`] = `
 "Import source must be string (1:15)
 > 1 | import source s from "x" with { attr: "val" };
     |               ^
-  2 |"
+  2 |
+Cause: [1:15]: Import source must be string"
 `;
 
 exports[`import-source-attributes-declaration.js format 1`] = `
@@ -88,21 +94,24 @@ exports[`import-source-attributes-expression.js [acorn] format 1`] = `
 "The only valid meta property for import is 'import.meta' (1:8)
 > 1 | import.source("x", { with: { attr: "val" } });
     |        ^
-  2 |"
+  2 |
+Cause: The only valid meta property for import is 'import.meta' (1:7)"
 `;
 
 exports[`import-source-attributes-expression.js [espree] format 1`] = `
 "The only valid meta property for import is 'import.meta' (1:8)
 > 1 | import.source("x", { with: { attr: "val" } });
     |        ^
-  2 |"
+  2 |
+Cause: The only valid meta property for import is 'import.meta'"
 `;
 
 exports[`import-source-attributes-expression.js [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:13)
 > 1 | import.source("x", { with: { attr: "val" } });
     |             ^
-  2 |"
+  2 |
+Cause: [1:13]: Unexpected token: 'identifier'"
 `;
 
 exports[`import-source-attributes-expression.js format 1`] = `
@@ -123,21 +132,24 @@ exports[`import-source-binding-from.js [acorn] format 1`] = `
 "Unexpected token (1:20)
 > 1 | import source from from "x";
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:19)"
 `;
 
 exports[`import-source-binding-from.js [espree] format 1`] = `
 "Unexpected token from (1:20)
 > 1 | import source from from "x";
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token from"
 `;
 
 exports[`import-source-binding-from.js [meriyah] format 1`] = `
 "Import source must be string (1:23)
 > 1 | import source from from "x";
     |                       ^
-  2 |"
+  2 |
+Cause: [1:23]: Import source must be string"
 `;
 
 exports[`import-source-binding-from.js format 1`] = `
@@ -158,21 +170,24 @@ exports[`import-source-binding-source.js [acorn] format 1`] = `
 "Unexpected token (1:15)
 > 1 | import source source from "x";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`import-source-binding-source.js [espree] format 1`] = `
 "Unexpected token source (1:15)
 > 1 | import source source from "x";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token source"
 `;
 
 exports[`import-source-binding-source.js [meriyah] format 1`] = `
 "Import source must be string (1:20)
 > 1 | import source source from "x";
     |                    ^
-  2 |"
+  2 |
+Cause: [1:20]: Import source must be string"
 `;
 
 exports[`import-source-binding-source.js format 1`] = `
@@ -193,21 +208,24 @@ exports[`import-source-dynamic-import.js [acorn] format 1`] = `
 "The only valid meta property for import is 'import.meta' (1:8)
 > 1 | import.source("foo");
     |        ^
-  2 |"
+  2 |
+Cause: The only valid meta property for import is 'import.meta' (1:7)"
 `;
 
 exports[`import-source-dynamic-import.js [espree] format 1`] = `
 "The only valid meta property for import is 'import.meta' (1:8)
 > 1 | import.source("foo");
     |        ^
-  2 |"
+  2 |
+Cause: The only valid meta property for import is 'import.meta'"
 `;
 
 exports[`import-source-dynamic-import.js [meriyah] format 1`] = `
 "Unexpected token: 'identifier' (1:13)
 > 1 | import.source("foo");
     |             ^
-  2 |"
+  2 |
+Cause: [1:13]: Unexpected token: 'identifier'"
 `;
 
 exports[`import-source-dynamic-import.js format 1`] = `
@@ -228,68 +246,78 @@ exports[`no-named.js [__babel_estree] format 1`] = `
 "Only \`import source x from "./module"\` is valid. (1:17)
 > 1 | import source { x } from "x";
     |                 ^
-  2 |"
+  2 |
+Cause: Only \`import source x from "./module"\` is valid. (1:16)"
 `;
 
 exports[`no-named.js [acorn] format 1`] = `
 "Unexpected token (1:15)
 > 1 | import source { x } from "x";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`no-named.js [babel] format 1`] = `
 "Only \`import source x from "./module"\` is valid. (1:17)
 > 1 | import source { x } from "x";
     |                 ^
-  2 |"
+  2 |
+Cause: Only \`import source x from "./module"\` is valid. (1:16)"
 `;
 
 exports[`no-named.js [espree] format 1`] = `
 "Unexpected token { (1:15)
 > 1 | import source { x } from "x";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token {"
 `;
 
 exports[`no-named.js [meriyah] format 1`] = `
 "Import source must be string (1:15)
 > 1 | import source { x } from "x";
     |               ^
-  2 |"
+  2 |
+Cause: [1:15]: Import source must be string"
 `;
 
 exports[`no-namespace.js [__babel_estree] format 1`] = `
 "Only \`import source x from "./module"\` is valid. (1:15)
 > 1 | import source * as x from "x";
     |               ^
-  2 |"
+  2 |
+Cause: Only \`import source x from "./module"\` is valid. (1:14)"
 `;
 
 exports[`no-namespace.js [acorn] format 1`] = `
 "Unexpected token (1:15)
 > 1 | import source * as x from "x";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`no-namespace.js [babel] format 1`] = `
 "Only \`import source x from "./module"\` is valid. (1:15)
 > 1 | import source * as x from "x";
     |               ^
-  2 |"
+  2 |
+Cause: Only \`import source x from "./module"\` is valid. (1:14)"
 `;
 
 exports[`no-namespace.js [espree] format 1`] = `
 "Unexpected token * (1:15)
 > 1 | import source * as x from "x";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token *"
 `;
 
 exports[`no-namespace.js [meriyah] format 1`] = `
 "Import source must be string (1:15)
 > 1 | import source * as x from "x";
     |               ^
-  2 |"
+  2 |
+Cause: [1:15]: Import source must be string"
 `;

tests/format/js/strings/__snapshots__/jsfmt.spec.js.snap

@@ -120,7 +120,8 @@ exports[`non-octal-eight-and-nine.js - {"trailingComma":"all"} [acorn] format 1`
     |   ^
   4 | () => {
   5 |   "use strict";
-  6 |   "\\8", "\\9";"
+  6 |   "\\8", "\\9";
+Cause: Invalid escape sequence (3:2)"
 `;
 
 exports[`non-octal-eight-and-nine.js - {"trailingComma":"all"} [espree] format 1`] = `
@@ -131,7 +132,8 @@ exports[`non-octal-eight-and-nine.js - {"trailingComma":"all"} [espree] format 1
     |   ^
   4 | () => {
   5 |   "use strict";
-  6 |   "\\8", "\\9";"
+  6 |   "\\8", "\\9";
+Cause: Invalid escape sequence"
 `;
 
 exports[`non-octal-eight-and-nine.js - {"trailingComma":"all"} format 1`] = `
@@ -169,7 +171,8 @@ exports[`non-octal-eight-and-nine.js - {"trailingComma":"es5"} [acorn] format 1`
     |   ^
   4 | () => {
   5 |   "use strict";
-  6 |   "\\8", "\\9";"
+  6 |   "\\8", "\\9";
+Cause: Invalid escape sequence (3:2)"
 `;
 
 exports[`non-octal-eight-and-nine.js - {"trailingComma":"es5"} [espree] format 1`] = `
@@ -180,7 +183,8 @@ exports[`non-octal-eight-and-nine.js - {"trailingComma":"es5"} [espree] format 1
     |   ^
   4 | () => {
   5 |   "use strict";
-  6 |   "\\8", "\\9";"
+  6 |   "\\8", "\\9";
+Cause: Invalid escape sequence"
 `;
 
 exports[`non-octal-eight-and-nine.js - {"trailingComma":"es5"} format 1`] = `

tests/format/js/throw_expressions/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`throw_expression.js [acorn] format 1`] = `
     |                          ^
   2 |
   3 | lint(ast, {
-  4 |   with: () => throw new Error("avoid using 'with' statements.")"
+  4 |   with: () => throw new Error("avoid using 'with' statements.")
+Cause: Unexpected token (1:25)"
 `;
 
 exports[`throw_expression.js [espree] format 1`] = `
@@ -15,7 +16,8 @@ exports[`throw_expression.js [espree] format 1`] = `
     |                          ^
   2 |
   3 | lint(ast, {
-  4 |   with: () => throw new Error("avoid using 'with' statements.")"
+  4 |   with: () => throw new Error("avoid using 'with' statements.")
+Cause: Unexpected token throw"
 `;
 
 exports[`throw_expression.js [meriyah] format 1`] = `
@@ -24,7 +26,8 @@ exports[`throw_expression.js [meriyah] format 1`] = `
     |                              ^
   2 |
   3 | lint(ast, {
-  4 |   with: () => throw new Error("avoid using 'with' statements.")"
+  4 |   with: () => throw new Error("avoid using 'with' statements.")
+Cause: [1:30]: Unexpected token: 'throw'"
 `;
 
 exports[`throw_expression.js format 1`] = `

tests/format/js/tuple/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`destructuring.js [acorn] format 1`] = `
     |                 ^
   2 | assert(a === 1);
   3 | assert(b === 2);
-  4 |"
+  4 |
+Cause: Unexpected character '[' (1:16)"
 `;
 
 exports[`destructuring.js [espree] format 1`] = `
@@ -15,7 +16,8 @@ exports[`destructuring.js [espree] format 1`] = `
     |                 ^
   2 | assert(a === 1);
   3 | assert(b === 2);
-  4 |"
+  4 |
+Cause: Unexpected character '['"
 `;
 
 exports[`destructuring.js [meriyah] format 1`] = `
@@ -24,7 +26,8 @@ exports[`destructuring.js [meriyah] format 1`] = `
     |                ^
   2 | assert(a === 1);
   3 | assert(b === 2);
-  4 |"
+  4 |
+Cause: [1:16]: '#' not followed by identifier"
 `;
 
 exports[`destructuring.js format 1`] = `
@@ -61,35 +64,40 @@ exports[`invalid-tuple-holes.js [__babel_estree] format 1`] = `
 "Unexpected token ','. (1:4)
 > 1 | #[,]
     |    ^
-  2 |"
+  2 |
+Cause: Unexpected token ','. (1:3)"
 `;
 
 exports[`invalid-tuple-holes.js [acorn] format 1`] = `
 "Unexpected character '[' (1:2)
 > 1 | #[,]
     |  ^
-  2 |"
+  2 |
+Cause: Unexpected character '[' (1:1)"
 `;
 
 exports[`invalid-tuple-holes.js [babel] format 1`] = `
 "Unexpected token ','. (1:4)
 > 1 | #[,]
     |    ^
-  2 |"
+  2 |
+Cause: Unexpected token ','. (1:3)"
 `;
 
 exports[`invalid-tuple-holes.js [espree] format 1`] = `
 "Unexpected character '[' (1:2)
 > 1 | #[,]
     |  ^
-  2 |"
+  2 |
+Cause: Unexpected character '['"
 `;
 
 exports[`invalid-tuple-holes.js [meriyah] format 1`] = `
 "'#' not followed by identifier (1:1)
 > 1 | #[,]
     | ^
-  2 |"
+  2 |
+Cause: [1:1]: '#' not followed by identifier"
 `;
 
 exports[`syntax.js [acorn] format 1`] = `
@@ -98,7 +106,8 @@ exports[`syntax.js [acorn] format 1`] = `
     |  ^
   2 | #[1, 2]
   3 | #[1, 2, #{ a: 3 }]
-  4 |"
+  4 |
+Cause: Unexpected character '[' (1:1)"
 `;
 
 exports[`syntax.js [espree] format 1`] = `
@@ -107,7 +116,8 @@ exports[`syntax.js [espree] format 1`] = `
     |  ^
   2 | #[1, 2]
   3 | #[1, 2, #{ a: 3 }]
-  4 |"
+  4 |
+Cause: Unexpected character '['"
 `;
 
 exports[`syntax.js [meriyah] format 1`] = `
@@ -116,7 +126,8 @@ exports[`syntax.js [meriyah] format 1`] = `
     | ^
   2 | #[1, 2]
   3 | #[1, 2, #{ a: 3 }]
-  4 |"
+  4 |
+Cause: [1:1]: '#' not followed by identifier"
 `;
 
 exports[`syntax.js format 1`] = `
@@ -143,7 +154,8 @@ exports[`tuple.js [acorn] format 1`] = `
     |                 ^
   2 |
   3 | assert(tuple1[0] === 1);
-  4 |"
+  4 |
+Cause: Unexpected character '[' (1:16)"
 `;
 
 exports[`tuple.js [espree] format 1`] = `
@@ -152,7 +164,8 @@ exports[`tuple.js [espree] format 1`] = `
     |                 ^
   2 |
   3 | assert(tuple1[0] === 1);
-  4 |"
+  4 |
+Cause: Unexpected character '['"
 `;
 
 exports[`tuple.js [meriyah] format 1`] = `
@@ -161,7 +174,8 @@ exports[`tuple.js [meriyah] format 1`] = `
     |                ^
   2 |
   3 | assert(tuple1[0] === 1);
-  4 |"
+  4 |
+Cause: [1:16]: '#' not followed by identifier"
 `;
 
 exports[`tuple.js format 1`] = `
@@ -214,21 +228,24 @@ exports[`tuple-trailing-comma.js [acorn] format 1`] = `
 "Unexpected character '[' (1:2)
 > 1 | #[1,]
     |  ^
-  2 |"
+  2 |
+Cause: Unexpected character '[' (1:1)"
 `;
 
 exports[`tuple-trailing-comma.js [espree] format 1`] = `
 "Unexpected character '[' (1:2)
 > 1 | #[1,]
     |  ^
-  2 |"
+  2 |
+Cause: Unexpected character '['"
 `;
 
 exports[`tuple-trailing-comma.js [meriyah] format 1`] = `
 "'#' not followed by identifier (1:1)
 > 1 | #[1,]
     | ^
-  2 |"
+  2 |
+Cause: [1:1]: '#' not followed by identifier"
 `;
 
 exports[`tuple-trailing-comma.js format 1`] = `

tests/format/js/v8_intrinsic/__snapshots__/jsfmt.spec.js.snap

@@ -5,7 +5,8 @@ exports[`avoid-conflicts-to-pipeline.js [acorn] format 1`] = `
   1 | // |>
 > 2 | const status = %GetOptimizationStatus(fn);
     |                ^
-  3 |"
+  3 |
+Cause: Unexpected token (2:15)"
 `;
 
 exports[`avoid-conflicts-to-pipeline.js [espree] format 1`] = `
@@ -13,7 +14,8 @@ exports[`avoid-conflicts-to-pipeline.js [espree] format 1`] = `
   1 | // |>
 > 2 | const status = %GetOptimizationStatus(fn);
     |                ^
-  3 |"
+  3 |
+Cause: Unexpected token %"
 `;
 
 exports[`avoid-conflicts-to-pipeline.js [meriyah] format 1`] = `
@@ -21,7 +23,8 @@ exports[`avoid-conflicts-to-pipeline.js [meriyah] format 1`] = `
   1 | // |>
 > 2 | const status = %GetOptimizationStatus(fn);
     |                ^
-  3 |"
+  3 |
+Cause: [2:16]: Unexpected token: '%'"
 `;
 
 exports[`avoid-conflicts-to-pipeline.js format 1`] = `
@@ -47,7 +50,8 @@ exports[`intrinsic_call.js [acorn] format 1`] = `
     |             ^
   3 |         (
   4 |                 foo )
-  5 |   }"
+  5 |   }
+Cause: Unexpected token (2:12)"
 `;
 
 exports[`intrinsic_call.js [espree] format 1`] = `
@@ -57,7 +61,8 @@ exports[`intrinsic_call.js [espree] format 1`] = `
     |             ^
   3 |         (
   4 |                 foo )
-  5 |   }"
+  5 |   }
+Cause: Unexpected token %"
 `;
 
 exports[`intrinsic_call.js [meriyah] format 1`] = `
@@ -67,7 +72,8 @@ exports[`intrinsic_call.js [meriyah] format 1`] = `
     |             ^
   3 |         (
   4 |                 foo )
-  5 |   }"
+  5 |   }
+Cause: [2:13]: Unexpected token: '%'"
 `;
 
 exports[`intrinsic_call.js format 1`] = `

tests/format/jsx/comments/__snapshots__/jsfmt.spec.js.snap

@@ -90,7 +90,8 @@ exports[`in-end-tag.js - {"bracketSameLine":true} [meriyah] format 1`] = `
     |           ^
   3 | /a>;
   4 | <a></* block */
-  5 | /a>;"
+  5 | /a>;
+Cause: [2:11]: Expected '>'"
 `;
 
 exports[`in-end-tag.js - {"bracketSameLine":true} [typescript] format 1`] = `
@@ -100,7 +101,8 @@ exports[`in-end-tag.js - {"bracketSameLine":true} [typescript] format 1`] = `
     |      ^
   3 | /a>;
   4 | <a></* block */
-  5 | /a>;"
+  5 | /a>;
+Cause: Identifier expected."
 `;
 
 exports[`in-end-tag.js - {"bracketSameLine":true} format 1`] = `

tests/format/jsx/do/__snapshots__/jsfmt.spec.js.snap

@@ -7,7 +7,8 @@ exports[`do.js [acorn] format 1`] = `
     |    ^
   3 | 	  1
   4 |   }}
-  5 | </div>"
+  5 | </div>
+Cause: Unexpected token (2:3)"
 `;
 
 exports[`do.js [espree] format 1`] = `
@@ -17,7 +18,8 @@ exports[`do.js [espree] format 1`] = `
     |    ^
   3 | 	  1
   4 |   }}
-  5 | </div>"
+  5 | </div>
+Cause: Unexpected token do"
 `;
 
 exports[`do.js [meriyah] format 1`] = `
@@ -27,7 +29,8 @@ exports[`do.js [meriyah] format 1`] = `
     |     ^
   3 | 	  1
   4 |   }}
-  5 | </div>"
+  5 | </div>
+Cause: [2:5]: Unexpected token: 'do'"
 `;
 
 exports[`do.js format 1`] = `

tests/format/jsx/fragment/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`fragment.js [meriyah] format 1`] = `
      |                     ^
   39 |   <Component />
   40 |   <Component />
-  41 | </ /* close fragment */>;"
+  41 | </ /* close fragment */>;
+Cause: [38:21]: Unexpected token: '>'"
 `;
 
 exports[`fragment.js format 1`] = `

tests/format/jsx/spread/__snapshots__/jsfmt.spec.js.snap

@@ -79,7 +79,8 @@ exports[`child.js [acorn] format 1`] = `
     |       ^
   2 |
   3 | <div>{...a /* comment */}</div>;
-  4 |"
+  4 |
+Cause: Unexpected token (1:6)"
 `;
 
 exports[`child.js [espree] format 1`] = `
@@ -88,7 +89,8 @@ exports[`child.js [espree] format 1`] = `
     |       ^
   2 |
   3 | <div>{...a /* comment */}</div>;
-  4 |"
+  4 |
+Cause: Unexpected token ..."
 `;
 
 exports[`child.js format 1`] = `

tests/format/jsx/tuple/__snapshots__/jsfmt.spec.js.snap

@@ -8,7 +8,8 @@ exports[`tuple.js [acorn] format 1`] = `
     |      ^
   7 |   <div/>,
   8 |   <div/>,
-  9 | ]"
+  9 | ]
+Cause: Unexpected character '[' (6:5)"
 `;
 
 exports[`tuple.js [espree] format 1`] = `
@@ -19,7 +20,8 @@ exports[`tuple.js [espree] format 1`] = `
     |      ^
   7 |   <div/>,
   8 |   <div/>,
-  9 | ]"
+  9 | ]
+Cause: Unexpected character '['"
 `;
 
 exports[`tuple.js [meriyah] format 1`] = `
@@ -30,7 +32,8 @@ exports[`tuple.js [meriyah] format 1`] = `
     |     ^
   7 |   <div/>,
   8 |   <div/>,
-  9 | ]"
+  9 | ]
+Cause: [6:5]: '#' not followed by identifier"
 `;
 
 exports[`tuple.js format 1`] = `

tests/format/misc/errors/babel-flow/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`async-arrow-invalid.js [babel] format 1`] = `
   2 |
 > 3 | <T> async () => {}
     |                   ^
-  4 |"
+  4 |
+Cause: Unterminated JSX contents. (3:18)"
 `;
 
 exports[`async-arrow-invalid.js [babel-flow] format 1`] = `
@@ -15,19 +16,22 @@ exports[`async-arrow-invalid.js [babel-flow] format 1`] = `
   2 |
 > 3 | <T> async () => {}
     | ^
-  4 |"
+  4 |
+Cause: Type parameters must come after the async keyword, e.g. instead of \`<T> async () => {}\`, use \`async <T>() => {}\`. (3:0)"
 `;
 
 exports[`wrong-arrow-no-parens-jsx.js [babel] format 1`] = `
 "Unterminated JSX contents. (1:4)
 > 1 | <T>(a => b);
     |    ^
-  2 |"
+  2 |
+Cause: Unterminated JSX contents. (1:3)"
 `;
 
 exports[`wrong-arrow-no-parens-jsx.js [babel-flow] format 1`] = `
 "Unterminated JSX contents. (1:4)
 > 1 | <T>(a => b);
     |    ^
-  2 |"
+  2 |
+Cause: Unterminated JSX contents. (1:3)"
 `;

tests/format/misc/errors/babel-ts/__snapshots__/jsfmt.spec.js.snap

@@ -4,7 +4,8 @@ exports[`export-declare.ts [babel-ts] format 1`] = `
 "'export declare' must be followed by an ambient declaration. (1:16)
 > 1 | export declare foo;
     |                ^
-  2 |"
+  2 |
+Cause: 'export declare' must be followed by an ambient declaration. (1:15)"
 `;
 
 exports[`multiline-declaration-abstract-class.ts [babel-ts] format 1`] = `
@@ -12,7 +13,8 @@ exports[`multiline-declaration-abstract-class.ts [babel-ts] format 1`] = `
 > 1 | declare abstract
     |        ^
   2 | class A {}
-  3 |"
+  3 |
+Cause: Missing semicolon. (1:7)"
 `;
 
 exports[`multiline-declaration-interface.ts [babel-ts] format 1`] = `
@@ -21,7 +23,8 @@ exports[`multiline-declaration-interface.ts [babel-ts] format 1`] = `
     |        ^
   2 | I
   3 | {}
-  4 |"
+  4 |
+Cause: Missing semicolon. (1:7)"
 `;
 
 exports[`multiline-declaration-module.ts [babel-ts] format 1`] = `
@@ -30,7 +33,8 @@ exports[`multiline-declaration-module.ts [babel-ts] format 1`] = `
     |        ^
   2 | 'bar'
   3 | {}
-  4 |"
+  4 |
+Cause: Missing semicolon. (1:7)"
 `;
 
 exports[`multiline-declaration-type.ts [babel-ts] format 1`] = `
@@ -38,7 +42,8 @@ exports[`multiline-declaration-type.ts [babel-ts] format 1`] = `
 > 1 | declare type
     |        ^
   2 | T = number
-  3 |"
+  3 |
+Cause: Missing semicolon. (1:7)"
 `;
 
 exports[`parenthesized-decorators-tagged-template.ts [babel-ts] format 1`] = `
@@ -48,21 +53,24 @@ exports[`parenthesized-decorators-tagged-template.ts [babel-ts] format 1`] = `
     |       ^
   3 |   text: string = "text"
   4 | }
-  5 |"
+  5 |
+Cause: Unexpected token (2:6)"
 `;
 
 exports[`type-annotation-expr-statement.ts [babel-ts] format 1`] = `
 "Did not expect a type annotation here. (1:3)
 > 1 | (a: T);
     |   ^
-  2 |"
+  2 |
+Cause: Did not expect a type annotation here. (1:2)"
 `;
 
 exports[`type-annotation-func.ts [babel-ts] format 1`] = `
 "Did not expect a type annotation here. (1:10)
 > 1 | func<T>(a: T);
     |          ^
-  2 |"
+  2 |
+Cause: Did not expect a type annotation here. (1:9)"
 `;
 
 exports[`type-annotation-in-jsx.tsx [babel-ts] format 1`] = `
@@ -73,5 +81,6 @@ exports[`type-annotation-in-jsx.tsx [babel-ts] format 1`] = `
     |                      ^
   4 |   );
   5 | }
-  6 |"
+  6 |
+Cause: Did not expect a type annotation here. (3:21)"
 `;

tests/format/misc/errors/css/__snapshots__/jsfmt.spec.js.snap

@@ -4,12 +4,14 @@ exports[`less-syntax.css [css] format 1`] = `
 "CssSyntaxError: Unknown word (1:4)
 > 1 | a {.bordered();}
     |    ^
-  2 |"
+  2 |
+Cause: <css input>:1:4: Unknown word"
 `;
 
 exports[`scss-syntax.css [css] format 1`] = `
 "CssSyntaxError: Unknown word (1:15)
 > 1 | a {content: #{$foo}}
     |               ^
-  2 |"
+  2 |
+Cause: <css input>:1:15: Unknown word"
 `;

tests/format/misc/errors/flow/interface/__snapshots__/jsfmt.spec.js.snap

@@ -3,7 +3,8 @@
 exports[`snippet: #0 [babel-flow] format 1`] = `
 "\`declare export interface\` is not supported. Use \`export interface\` instead. (1:16)
 > 1 | declare export interface A {}
-    |                ^"
+    |                ^
+Cause: \`declare export interface\` is not supported. Use \`export interface\` instead. (1:15)"
 `;
 
 exports[`snippet: #0 [flow] format 1`] = `
@@ -15,7 +16,8 @@ exports[`snippet: #0 [flow] format 1`] = `
 exports[`snippet: #1 [babel-flow] format 1`] = `
 "Unexpected token, expected "{" (1:13)
 > 1 | interface A mixins B {}
-    |             ^"
+    |             ^
+Cause: Unexpected token, expected "{" (1:12)"
 `;
 
 exports[`snippet: #1 [flow] format 1`] = `
@@ -27,7 +29,8 @@ exports[`snippet: #1 [flow] format 1`] = `
 exports[`snippet: #2 [babel-flow] format 1`] = `
 "Unexpected token, expected "{" (1:13)
 > 1 | interface A implements B {}
-    |             ^"
+    |             ^
+Cause: Unexpected token, expected "{" (1:12)"
 `;
 
 exports[`snippet: #2 [flow] format 1`] = `
@@ -39,7 +42,8 @@ exports[`snippet: #2 [flow] format 1`] = `
 exports[`snippet: #3 [babel-flow] format 1`] = `
 "Unexpected token, expected "{" (1:21)
 > 1 | declare interface A mixins B {}
-    |                     ^"
+    |                     ^
+Cause: Unexpected token, expected "{" (1:20)"
 `;
 
 exports[`snippet: #3 [flow] format 1`] = `
@@ -51,7 +55,8 @@ exports[`snippet: #3 [flow] format 1`] = `
 exports[`snippet: #4 [babel-flow] format 1`] = `
 "Unexpected token, expected "{" (1:21)
 > 1 | declare interface A implements B {}
-    |                     ^"
+    |                     ^
+Cause: Unexpected token, expected "{" (1:20)"
 `;
 
 exports[`snippet: #4 [flow] format 1`] = `

tests/format/misc/errors/graphql/__snapshots__/jsfmt.spec.js.snap

@@ -8,5 +8,6 @@ exports[`type-interfaces.graphql [graphql] format 1`] = `
     |                     ^
   6 |   a: a
   7 | }
-  8 |"
+  8 |
+Cause: Syntax Error: Unexpected "|"."
 `;

tests/format/misc/errors/handlebars/__snapshots__/jsfmt.spec.js.snap

@@ -5,7 +5,11 @@ exports[`invalid.hbs [glimmer] format 1`] = `
   1 | <A >
 > 2 | x, {{@name}
     |           ^
-  3 |"
+  3 |
+Cause: Parse error on line 2:
+<A >x, {{@name}
+--------------^
+Expecting 'CLOSE_RAW_BLOCK', 'CLOSE', 'CLOSE_UNESCAPED', 'OPEN_SEXPR', 'CLOSE_SEXPR', 'ID', 'OPEN_BLOCK_PARAMS', 'STRING', 'NUMBER', 'BOOLEAN', 'UNDEFINED', 'NULL', 'DATA', 'SEP', got 'INVALID'"
 `;
 
 exports[`invalid-2.hbs [glimmer] format 1`] = `
@@ -14,7 +18,14 @@ exports[`invalid-2.hbs [glimmer] format 1`] = `
   2 |
 > 3 | <{@name>
     | ^^^^^^^^
-  4 |"
+  4 |
+Cause: Unclosed element \`@name\`: 
+
+|
+|  <{@name>
+|
+
+(error occurred in 'an unknown module' @ line 3 : column 0)"
 `;
 
 exports[`invalid-3.hbs [glimmer] format 1`] = `
@@ -23,187 +34,395 @@ exports[`invalid-3.hbs [glimmer] format 1`] = `
   2 |
 > 3 | {{}}
     |   ^
-  4 |"
+  4 |
+Cause: Parse error on line 3:
+<a>{{}}
+-----^
+Expecting 'OPEN_SEXPR', 'ID', 'STRING', 'NUMBER', 'BOOLEAN', 'UNDEFINED', 'NULL', 'DATA', got 'CLOSE'"
 `;
 
 exports[`snippet: IMG [glimmer] format 1`] = `
 "Unclosed element \`IMG\` (1:0)
 > 1 | <IMG>
-    | ^^^^^"
+    | ^^^^^
+Cause: Unclosed element \`IMG\`: 
+
+|
+|  <IMG>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 0)"
 `;
 
 exports[`snippet: INPUT [glimmer] format 1`] = `
 "Unclosed element \`INPUT\` (1:0)
 > 1 | <INPUT>
-    | ^^^^^^^"
+    | ^^^^^^^
+Cause: Unclosed element \`INPUT\`: 
+
+|
+|  <INPUT>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 0)"
 `;
 
 exports[`snippet: area [glimmer] format 1`] = `
 "<area> elements do not need end tags. You should remove it (1:6)
 > 1 | <area></area>
-    |      ^^^^^^^"
+    |      ^^^^^^^
+Cause: <area> elements do not need end tags. You should remove it: 
+
+|
+|  </area>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 6)"
 `;
 
 exports[`snippet: base [glimmer] format 1`] = `
 "<base> elements do not need end tags. You should remove it (1:6)
 > 1 | <base></base>
-    |      ^^^^^^^"
+    |      ^^^^^^^
+Cause: <base> elements do not need end tags. You should remove it: 
+
+|
+|  </base>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 6)"
 `;
 
 exports[`snippet: basefont [glimmer] format 1`] = `
 "Unclosed element \`basefont\` (1:0)
 > 1 | <basefont>
-    | ^^^^^^^^^^"
+    | ^^^^^^^^^^
+Cause: Unclosed element \`basefont\`: 
+
+|
+|  <basefont>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 0)"
 `;
 
 exports[`snippet: bgsound [glimmer] format 1`] = `
 "Unclosed element \`bgsound\` (1:0)
 > 1 | <bgsound>
-    | ^^^^^^^^^"
+    | ^^^^^^^^^
+Cause: Unclosed element \`bgsound\`: 
+
+|
+|  <bgsound>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 0)"
 `;
 
 exports[`snippet: br [glimmer] format 1`] = `
 "<br> elements do not need end tags. You should remove it (1:4)
 > 1 | <br></br>
-    |    ^^^^^"
+    |    ^^^^^
+Cause: <br> elements do not need end tags. You should remove it: 
+
+|
+|  </br>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 4)"
 `;
 
 exports[`snippet: col [glimmer] format 1`] = `
 "<col> elements do not need end tags. You should remove it (1:5)
 > 1 | <col></col>
-    |     ^^^^^^"
+    |     ^^^^^^
+Cause: <col> elements do not need end tags. You should remove it: 
+
+|
+|  </col>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 5)"
 `;
 
 exports[`snippet: command [glimmer] format 1`] = `
 "<command> elements do not need end tags. You should remove it (1:9)
 > 1 | <command></command>
-    |         ^^^^^^^^^^"
+    |         ^^^^^^^^^^
+Cause: <command> elements do not need end tags. You should remove it: 
+
+|
+|  </command>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 9)"
 `;
 
 exports[`snippet: div [glimmer] format 1`] = `
 "Unclosed element \`div\` (1:0)
 > 1 | <div>
-    | ^^^^^"
+    | ^^^^^
+Cause: Unclosed element \`div\`: 
+
+|
+|  <div>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 0)"
 `;
 
 exports[`snippet: embed [glimmer] format 1`] = `
 "<embed> elements do not need end tags. You should remove it (1:7)
 > 1 | <embed></embed>
-    |       ^^^^^^^^"
+    |       ^^^^^^^^
+Cause: <embed> elements do not need end tags. You should remove it: 
+
+|
+|  </embed>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 7)"
 `;
 
 exports[`snippet: frame [glimmer] format 1`] = `
 "Unclosed element \`frame\` (1:0)
 > 1 | <frame>
-    | ^^^^^^^"
+    | ^^^^^^^
+Cause: Unclosed element \`frame\`: 
+
+|
+|  <frame>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 0)"
 `;
 
 exports[`snippet: hr [glimmer] format 1`] = `
 "<hr> elements do not need end tags. You should remove it (1:4)
 > 1 | <hr></hr>
-    |    ^^^^^"
+    |    ^^^^^
+Cause: <hr> elements do not need end tags. You should remove it: 
+
+|
+|  </hr>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 4)"
 `;
 
 exports[`snippet: imG [glimmer] format 1`] = `
 "Unclosed element \`imG\` (1:0)
 > 1 | <imG>
-    | ^^^^^"
+    | ^^^^^
+Cause: Unclosed element \`imG\`: 
+
+|
+|  <imG>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 0)"
 `;
 
 exports[`snippet: image [glimmer] format 1`] = `
 "Unclosed element \`image\` (1:0)
 > 1 | <image>
-    | ^^^^^^^"
+    | ^^^^^^^
+Cause: Unclosed element \`image\`: 
+
+|
+|  <image>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 0)"
 `;
 
 exports[`snippet: img [glimmer] format 1`] = `
 "<img> elements do not need end tags. You should remove it (1:5)
 > 1 | <img></img>
-    |     ^^^^^^"
+    |     ^^^^^^
+Cause: <img> elements do not need end tags. You should remove it: 
+
+|
+|  </img>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 5)"
 `;
 
 exports[`snippet: input [glimmer] format 1`] = `
 "<input> elements do not need end tags. You should remove it (1:7)
 > 1 | <input></input>
-    |       ^^^^^^^^"
+    |       ^^^^^^^^
+Cause: <input> elements do not need end tags. You should remove it: 
+
+|
+|  </input>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 7)"
 `;
 
 exports[`snippet: isindex [glimmer] format 1`] = `
 "Unclosed element \`isindex\` (1:0)
 > 1 | <isindex>
-    | ^^^^^^^^^"
+    | ^^^^^^^^^
+Cause: Unclosed element \`isindex\`: 
+
+|
+|  <isindex>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 0)"
 `;
 
 exports[`snippet: keygen [glimmer] format 1`] = `
 "<keygen> elements do not need end tags. You should remove it (1:8)
 > 1 | <keygen></keygen>
-    |        ^^^^^^^^^"
+    |        ^^^^^^^^^
+Cause: <keygen> elements do not need end tags. You should remove it: 
+
+|
+|  </keygen>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 8)"
 `;
 
 exports[`snippet: lINk [glimmer] format 1`] = `
 "Unclosed element \`lINk\` (1:0)
 > 1 | <lINk>
-    | ^^^^^^"
+    | ^^^^^^
+Cause: Unclosed element \`lINk\`: 
+
+|
+|  <lINk>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 0)"
 `;
 
 exports[`snippet: link [glimmer] format 1`] = `
 "<link> elements do not need end tags. You should remove it (1:6)
 > 1 | <link></link>
-    |      ^^^^^^^"
+    |      ^^^^^^^
+Cause: <link> elements do not need end tags. You should remove it: 
+
+|
+|  </link>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 6)"
 `;
 
 exports[`snippet: menuitem [glimmer] format 1`] = `
 "Unclosed element \`menuitem\` (1:0)
 > 1 | <menuitem>
-    | ^^^^^^^^^^"
+    | ^^^^^^^^^^
+Cause: Unclosed element \`menuitem\`: 
+
+|
+|  <menuitem>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 0)"
 `;
 
 exports[`snippet: meta [glimmer] format 1`] = `
 "<meta> elements do not need end tags. You should remove it (1:6)
 > 1 | <meta></meta>
-    |      ^^^^^^^"
+    |      ^^^^^^^
+Cause: <meta> elements do not need end tags. You should remove it: 
+
+|
+|  </meta>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 6)"
 `;
 
 exports[`snippet: nextid [glimmer] format 1`] = `
 "Unclosed element \`nextid\` (1:0)
 > 1 | <nextid>
-    | ^^^^^^^^"
+    | ^^^^^^^^
+Cause: Unclosed element \`nextid\`: 
+
+|
+|  <nextid>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 0)"
 `;
 
 exports[`snippet: param [glimmer] format 1`] = `
 "<param> elements do not need end tags. You should remove it (1:7)
 > 1 | <param></param>
-    |       ^^^^^^^^"
+    |       ^^^^^^^^
+Cause: <param> elements do not need end tags. You should remove it: 
+
+|
+|  </param>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 7)"
 `;
 
 exports[`snippet: source [glimmer] format 1`] = `
 "<source> elements do not need end tags. You should remove it (1:8)
 > 1 | <source></source>
-    |        ^^^^^^^^^"
+    |        ^^^^^^^^^
+Cause: <source> elements do not need end tags. You should remove it: 
+
+|
+|  </source>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 8)"
 `;
 
 exports[`snippet: track [glimmer] format 1`] = `
 "<track> elements do not need end tags. You should remove it (1:7)
 > 1 | <track></track>
-    |       ^^^^^^^^"
+    |       ^^^^^^^^
+Cause: <track> elements do not need end tags. You should remove it: 
+
+|
+|  </track>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 7)"
 `;
 
 exports[`snippet: wbr [glimmer] format 1`] = `
 "<wbr> elements do not need end tags. You should remove it (1:5)
 > 1 | <wbr></wbr>
-    |     ^^^^^^"
+    |     ^^^^^^
+Cause: <wbr> elements do not need end tags. You should remove it: 
+
+|
+|  </wbr>
+|
+
+(error occurred in 'an unknown module' @ line 1 : column 5)"
 `;
 
 exports[`tilde-comments-1.hbs [glimmer] format 1`] = `
 "Expecting 'OPEN_SEXPR', 'ID', 'STRING', 'NUMBER', 'BOOLEAN', 'UNDEFINED', 'NULL', 'DATA', got 'CLOSE' (1:4)
 > 1 | {{~}}
     |    ^
-  2 |"
+  2 |
+Cause: Parse error on line 1:
+{{~}}
+---^
+Expecting 'OPEN_SEXPR', 'ID', 'STRING', 'NUMBER', 'BOOLEAN', 'UNDEFINED', 'NULL', 'DATA', got 'CLOSE'"
 `;
 
 exports[`tilde-comments-2.hbs [glimmer] format 1`] = `
 "Expecting 'OPEN_SEXPR', 'ID', 'STRING', 'NUMBER', 'BOOLEAN', 'UNDEFINED', 'NULL', 'DATA', got 'CLOSE' (1:4)
 > 1 | {{~~}}
     |    ^
-  2 |"
+  2 |
+Cause: Parse error on line 1:
+{{~~}}
+---^
+Expecting 'OPEN_SEXPR', 'ID', 'STRING', 'NUMBER', 'BOOLEAN', 'UNDEFINED', 'NULL', 'DATA', got 'CLOSE'"
 `;

tests/format/misc/errors/invalid-typescript-decorators/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`decorator.ts [babel-ts] format 1`] = `
   3 | @dec
 > 4 | enum E {}
     | ^
-  5 |"
+  5 |
+Cause: Leading decorators must be attached to a class declaration. (4:0)"
 `;
 
 exports[`decorator.ts [typescript] format 1`] = `
@@ -16,7 +17,8 @@ exports[`decorator.ts [typescript] format 1`] = `
 > 3 | @dec
     | ^^^^
   4 | enum E {}
-  5 |"
+  5 |
+Cause: Decorators are not valid here."
 `;
 
 exports[`enums.ts [babel-ts] format 1`] = `
@@ -27,7 +29,8 @@ exports[`enums.ts [babel-ts] format 1`] = `
     | ^
   5 |                Up = 1,
   6 |   Down,
-  7 |   Left,"
+  7 |   Left,
+Cause: Leading decorators must be attached to a class declaration. (4:0)"
 `;
 
 exports[`enums.ts [typescript] format 1`] = `
@@ -38,7 +41,8 @@ exports[`enums.ts [typescript] format 1`] = `
     | ^^^^^^^^^^^^
   4 | enum Direction {
   5 |                Up = 1,
-  6 |   Down,"
+  6 |   Down,
+Cause: Decorators are not valid here."
 `;
 
 exports[`function.ts [babel-ts] format 1`] = `
@@ -47,7 +51,8 @@ exports[`function.ts [babel-ts] format 1`] = `
   3 | @decorator()
 > 4 | function foo(      ){}
     | ^
-  5 |"
+  5 |
+Cause: Leading decorators must be attached to a class declaration. (4:0)"
 `;
 
 exports[`function.ts [typescript] format 1`] = `
@@ -57,7 +62,8 @@ exports[`function.ts [typescript] format 1`] = `
 > 3 | @decorator()
     | ^^^^^^^^^^^^
   4 | function foo(      ){}
-  5 |"
+  5 |
+Cause: Decorators are not valid here."
 `;
 
 exports[`interface.ts [babel-ts] format 1`] = `
@@ -67,7 +73,8 @@ exports[`interface.ts [babel-ts] format 1`] = `
 > 5 | interface MyInterface {id: string;
     | ^
   6 | }
-  7 |"
+  7 |
+Cause: Leading decorators must be attached to a class declaration. (5:0)"
 `;
 
 exports[`interface.ts [typescript] format 1`] = `
@@ -78,7 +85,8 @@ exports[`interface.ts [typescript] format 1`] = `
     | ^^^^^^^^
   5 | interface MyInterface {id: string;
   6 | }
-  7 |"
+  7 |
+Cause: Decorators are not valid here."
 `;
 
 exports[`issue-9102.ts [babel-ts] format 1`] = `
@@ -87,7 +95,8 @@ exports[`issue-9102.ts [babel-ts] format 1`] = `
 > 2 | type T = 1;
     | ^
   3 | class C {}
-  4 |"
+  4 |
+Cause: Leading decorators must be attached to a class declaration. (2:0)"
 `;
 
 exports[`issue-9102.ts [typescript] format 1`] = `
@@ -96,5 +105,6 @@ exports[`issue-9102.ts [typescript] format 1`] = `
     | ^^^^^^^^^^^^
   2 | type T = 1;
   3 | class C {}
-  4 |"
+  4 |
+Cause: Decorators are not valid here."
 `;

tests/format/misc/errors/invalid/__snapshots__/jsfmt.spec.js.snap

@@ -3,49 +3,57 @@
 exports[`snippet: #0 [acorn] format 1`] = `
 "Unexpected token (1:5)
 > 1 | for each (a in b) {}
-    |     ^"
+    |     ^
+Cause: Unexpected token (1:4)"
 `;
 
 exports[`snippet: #0 [babel] format 1`] = `
 "Unexpected token, expected "(" (1:5)
 > 1 | for each (a in b) {}
-    |     ^"
+    |     ^
+Cause: Unexpected token, expected "(" (1:4)"
 `;
 
 exports[`snippet: #0 [babel] format 2`] = `
 "Invalid parenthesized assignment pattern. (1:1)
 > 1 | (a = b) = 1
-    | ^"
+    | ^
+Cause: Invalid parenthesized assignment pattern. (1:0)"
 `;
 
 exports[`snippet: #0 [babel-flow] format 1`] = `
 "Unexpected token, expected "(" (1:5)
 > 1 | for each (a in b) {}
-    |     ^"
+    |     ^
+Cause: Unexpected token, expected "(" (1:4)"
 `;
 
 exports[`snippet: #0 [babel-flow] format 2`] = `
 "Invalid parenthesized assignment pattern. (1:1)
 > 1 | (a = b) = 1
-    | ^"
+    | ^
+Cause: Invalid parenthesized assignment pattern. (1:0)"
 `;
 
 exports[`snippet: #0 [babel-ts] format 1`] = `
 "Unexpected token, expected "(" (1:5)
 > 1 | for each (a in b) {}
-    |     ^"
+    |     ^
+Cause: Unexpected token, expected "(" (1:4)"
 `;
 
 exports[`snippet: #0 [babel-ts] format 2`] = `
 "Invalid parenthesized assignment pattern. (1:1)
 > 1 | (a = b) = 1
-    | ^"
+    | ^
+Cause: Invalid parenthesized assignment pattern. (1:0)"
 `;
 
 exports[`snippet: #0 [espree] format 1`] = `
 "Unexpected token each (1:5)
 > 1 | for each (a in b) {}
-    |     ^"
+    |     ^
+Cause: Unexpected token each"
 `;
 
 exports[`snippet: #0 [flow] format 1`] = `
@@ -63,67 +71,78 @@ exports[`snippet: #0 [flow] format 2`] = `
 exports[`snippet: #0 [meriyah] format 1`] = `
 "Expected '(' (1:8)
 > 1 | for each (a in b) {}
-    |        ^"
+    |        ^
+Cause: [1:8]: Expected '('"
 `;
 
 exports[`snippet: #0 [meriyah] format 2`] = `
 "Invalid left-hand side in assignment (1:9)
 > 1 | (a = b) = 1
-    |         ^"
+    |         ^
+Cause: [1:9]: Invalid left-hand side in assignment"
 `;
 
 exports[`snippet: #0 [typescript] format 1`] = `
 "'(' expected. (1:5)
 > 1 | for each (a in b) {}
-    |     ^"
+    |     ^
+Cause: '(' expected."
 `;
 
 exports[`snippet: #1 [acorn] format 1`] = `
 "Unexpected token (1:7)
 > 1 | class switch() {}
-    |       ^"
+    |       ^
+Cause: Unexpected token (1:6)"
 `;
 
 exports[`snippet: #1 [babel] format 1`] = `
 "A class name is required. (1:7)
 > 1 | class switch() {}
-    |       ^"
+    |       ^
+Cause: A class name is required. (1:6)"
 `;
 
 exports[`snippet: #1 [babel] format 2`] = `
 "Invalid left-hand side in assignment expression. (1:5)
 > 1 | a = 1 = 2
-    |     ^"
+    |     ^
+Cause: Invalid left-hand side in assignment expression. (1:4)"
 `;
 
 exports[`snippet: #1 [babel-flow] format 1`] = `
 "A class name is required. (1:7)
 > 1 | class switch() {}
-    |       ^"
+    |       ^
+Cause: A class name is required. (1:6)"
 `;
 
 exports[`snippet: #1 [babel-flow] format 2`] = `
 "Invalid left-hand side in assignment expression. (1:5)
 > 1 | a = 1 = 2
-    |     ^"
+    |     ^
+Cause: Invalid left-hand side in assignment expression. (1:4)"
 `;
 
 exports[`snippet: #1 [babel-ts] format 1`] = `
 "A class name is required. (1:7)
 > 1 | class switch() {}
-    |       ^"
+    |       ^
+Cause: A class name is required. (1:6)"
 `;
 
 exports[`snippet: #1 [babel-ts] format 2`] = `
 "Invalid left-hand side in assignment expression. (1:5)
 > 1 | a = 1 = 2
-    |     ^"
+    |     ^
+Cause: Invalid left-hand side in assignment expression. (1:4)"
 `;
 
 exports[`snippet: #1 [espree] format 1`] = `
 "Unexpected token switch (1:7)
 > 1 | class switch() {}
-    |       ^"
+    |       ^
+Cause: Unexpected token switch"
 `;
 
 exports[`snippet: #1 [flow] format 1`] = `
@@ -141,67 +160,78 @@ exports[`snippet: #1 [flow] format 2`] = `
 exports[`snippet: #1 [meriyah] format 1`] = `
 "Unexpected strict mode reserved word (1:12)
 > 1 | class switch() {}
-    |            ^"
+    |            ^
+Cause: [1:12]: Unexpected strict mode reserved word"
 `;
 
 exports[`snippet: #1 [meriyah] format 2`] = `
 "Invalid left-hand side in assignment (1:7)
 > 1 | a = 1 = 2
-    |       ^"
+    |       ^
+Cause: [1:7]: Invalid left-hand side in assignment"
 `;
 
 exports[`snippet: #1 [typescript] format 1`] = `
 "'{' expected. (1:7)
 > 1 | class switch() {}
-    |       ^"
+    |       ^
+Cause: '{' expected."
 `;
 
 exports[`snippet: #2 [acorn] format 1`] = `
 "Unexpected token (1:13)
 > 1 | ({ method() })
-    |             ^"
+    |             ^
+Cause: Unexpected token (1:12)"
 `;
 
 exports[`snippet: #2 [babel] format 1`] = `
 "Unexpected token, expected "{" (1:13)
 > 1 | ({ method() })
-    |             ^"
+    |             ^
+Cause: Unexpected token, expected "{" (1:12)"
 `;
 
 exports[`snippet: #2 [babel] format 2`] = `
 "Invalid parenthesized assignment pattern. (1:1)
 > 1 | (a = 1) = 2
-    | ^"
+    | ^
+Cause: Invalid parenthesized assignment pattern. (1:0)"
 `;
 
 exports[`snippet: #2 [babel-flow] format 1`] = `
 "Unexpected token, expected "{" (1:13)
 > 1 | ({ method() })
-    |             ^"
+    |             ^
+Cause: Unexpected token, expected "{" (1:12)"
 `;
 
 exports[`snippet: #2 [babel-flow] format 2`] = `
 "Invalid parenthesized assignment pattern. (1:1)
 > 1 | (a = 1) = 2
-    | ^"
+    | ^
+Cause: Invalid parenthesized assignment pattern. (1:0)"
 `;
 
 exports[`snippet: #2 [babel-ts] format 1`] = `
 "Unexpected token, expected "{" (1:13)
 > 1 | ({ method() })
-    |             ^"
+    |             ^
+Cause: Unexpected token, expected "{" (1:12)"
 `;
 
 exports[`snippet: #2 [babel-ts] format 2`] = `
 "Invalid parenthesized assignment pattern. (1:1)
 > 1 | (a = 1) = 2
-    | ^"
+    | ^
+Cause: Invalid parenthesized assignment pattern. (1:0)"
 `;
 
 exports[`snippet: #2 [espree] format 1`] = `
 "Unexpected token } (1:13)
 > 1 | ({ method() })
-    |             ^"
+    |             ^
+Cause: Unexpected token }"
 `;
 
 exports[`snippet: #2 [flow] format 1`] = `
@@ -219,67 +249,78 @@ exports[`snippet: #2 [flow] format 2`] = `
 exports[`snippet: #2 [meriyah] format 1`] = `
 "Expected '{' (1:13)
 > 1 | ({ method() })
-    |             ^"
+    |             ^
+Cause: [1:13]: Expected '{'"
 `;
 
 exports[`snippet: #2 [meriyah] format 2`] = `
 "Invalid left-hand side in assignment (1:9)
 > 1 | (a = 1) = 2
-    |         ^"
+    |         ^
+Cause: [1:9]: Invalid left-hand side in assignment"
 `;
 
 exports[`snippet: #2 [typescript] format 1`] = `
 "'{' expected. (1:11)
 > 1 | ({ method() })
-    |           ^"
+    |           ^
+Cause: '{' expected."
 `;
 
 exports[`snippet: #3 [acorn] format 1`] = `
 "Unexpected token (1:15)
 > 1 | ({ method({}) })
-    |               ^"
+    |               ^
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`snippet: #3 [babel] format 1`] = `
 "Unexpected token, expected "{" (1:15)
 > 1 | ({ method({}) })
-    |               ^"
+    |               ^
+Cause: Unexpected token, expected "{" (1:14)"
 `;
 
 exports[`snippet: #3 [babel] format 2`] = `
 "Invalid parenthesized assignment pattern. (1:1)
 > 1 | (a += b) = 1
-    | ^"
+    | ^
+Cause: Invalid parenthesized assignment pattern. (1:0)"
 `;
 
 exports[`snippet: #3 [babel-flow] format 1`] = `
 "Unexpected token, expected "{" (1:15)
 > 1 | ({ method({}) })
-    |               ^"
+    |               ^
+Cause: Unexpected token, expected "{" (1:14)"
 `;
 
 exports[`snippet: #3 [babel-flow] format 2`] = `
 "Invalid parenthesized assignment pattern. (1:1)
 > 1 | (a += b) = 1
-    | ^"
+    | ^
+Cause: Invalid parenthesized assignment pattern. (1:0)"
 `;
 
 exports[`snippet: #3 [babel-ts] format 1`] = `
 "Unexpected token, expected "{" (1:15)
 > 1 | ({ method({}) })
-    |               ^"
+    |               ^
+Cause: Unexpected token, expected "{" (1:14)"
 `;
 
 exports[`snippet: #3 [babel-ts] format 2`] = `
 "Invalid parenthesized assignment pattern. (1:1)
 > 1 | (a += b) = 1
-    | ^"
+    | ^
+Cause: Invalid parenthesized assignment pattern. (1:0)"
 `;
 
 exports[`snippet: #3 [espree] format 1`] = `
 "Unexpected token } (1:15)
 > 1 | ({ method({}) })
-    |               ^"
+    |               ^
+Cause: Unexpected token }"
 `;
 
 exports[`snippet: #3 [flow] format 1`] = `
@@ -297,67 +338,78 @@ exports[`snippet: #3 [flow] format 2`] = `
 exports[`snippet: #3 [meriyah] format 1`] = `
 "Expected '{' (1:15)
 > 1 | ({ method({}) })
-    |               ^"
+    |               ^
+Cause: [1:15]: Expected '{'"
 `;
 
 exports[`snippet: #3 [meriyah] format 2`] = `
 "Invalid left-hand side in assignment (1:10)
 > 1 | (a += b) = 1
-    |          ^"
+    |          ^
+Cause: [1:10]: Invalid left-hand side in assignment"
 `;
 
 exports[`snippet: #3 [typescript] format 1`] = `
 "'{' expected. (1:13)
 > 1 | ({ method({}) })
-    |             ^"
+    |             ^
+Cause: '{' expected."
 `;
 
 exports[`snippet: #4 [acorn] format 1`] = `
 "Unexpected token (1:23)
 > 1 | ({ method(parameter,) })
-    |                       ^"
+    |                       ^
+Cause: Unexpected token (1:22)"
 `;
 
 exports[`snippet: #4 [babel] format 1`] = `
 "Unexpected token, expected "{" (1:23)
 > 1 | ({ method(parameter,) })
-    |                       ^"
+    |                       ^
+Cause: Unexpected token, expected "{" (1:22)"
 `;
 
 exports[`snippet: #4 [babel] format 2`] = `
 "Invalid left-hand side in assignment expression. (1:2)
 > 1 | (a = b) += 1
-    |  ^"
+    |  ^
+Cause: Invalid left-hand side in assignment expression. (1:1)"
 `;
 
 exports[`snippet: #4 [babel-flow] format 1`] = `
 "Unexpected token, expected "{" (1:23)
 > 1 | ({ method(parameter,) })
-    |                       ^"
+    |                       ^
+Cause: Unexpected token, expected "{" (1:22)"
 `;
 
 exports[`snippet: #4 [babel-flow] format 2`] = `
 "Invalid left-hand side in assignment expression. (1:2)
 > 1 | (a = b) += 1
-    |  ^"
+    |  ^
+Cause: Invalid left-hand side in assignment expression. (1:1)"
 `;
 
 exports[`snippet: #4 [babel-ts] format 1`] = `
 "Unexpected token, expected "{" (1:23)
 > 1 | ({ method(parameter,) })
-    |                       ^"
+    |                       ^
+Cause: Unexpected token, expected "{" (1:22)"
 `;
 
 exports[`snippet: #4 [babel-ts] format 2`] = `
 "Invalid left-hand side in assignment expression. (1:2)
 > 1 | (a = b) += 1
-    |  ^"
+    |  ^
+Cause: Invalid left-hand side in assignment expression. (1:1)"
 `;
 
 exports[`snippet: #4 [espree] format 1`] = `
 "Unexpected token } (1:23)
 > 1 | ({ method(parameter,) })
-    |                       ^"
+    |                       ^
+Cause: Unexpected token }"
 `;
 
 exports[`snippet: #4 [flow] format 1`] = `
@@ -375,17 +427,20 @@ exports[`snippet: #4 [flow] format 2`] = `
 exports[`snippet: #4 [meriyah] format 1`] = `
 "Expected '{' (1:23)
 > 1 | ({ method(parameter,) })
-    |                       ^"
+    |                       ^
+Cause: [1:23]: Expected '{'"
 `;
 
 exports[`snippet: #4 [meriyah] format 2`] = `
 "Invalid left-hand side in assignment (1:10)
 > 1 | (a = b) += 1
-    |          ^"
+    |          ^
+Cause: [1:10]: Invalid left-hand side in assignment"
 `;
 
 exports[`snippet: #4 [typescript] format 1`] = `
 "'{' expected. (1:21)
 > 1 | ({ method(parameter,) })
-    |                     ^"
+    |                     ^
+Cause: '{' expected."
 `;

tests/format/misc/errors/js/__snapshots__/jsfmt.spec.js.snap

@@ -8,35 +8,40 @@ exports[`html-like-comments.js [babel] format 1`] = `
     | ^
   4 | 'hello world'
   5 | )
-  6 |"
+  6 |
+Cause: Unexpected token (3:0)"
 `;
 
 exports[`import-assertions-for-export-without-from.js [babel] format 1`] = `
 "Missing semicolon. (1:26)
 > 1 | export { default as foo } assert { type: "json" };
     |                          ^
-  2 |"
+  2 |
+Cause: Missing semicolon. (1:25)"
 `;
 
 exports[`import-assertions-with-parens.js [babel] format 1`] = `
 "Unexpected token, expected "{" (1:19)
 > 1 | import "x" assert ({type: 'json'});
     |                   ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "{" (1:18)"
 `;
 
 exports[`import-attributes-for-export-without-from.js [babel] format 1`] = `
 "Unexpected token, expected "(" (1:32)
 > 1 | export { default as foo } with { type: "json" };
     |                                ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "(" (1:31)"
 `;
 
 exports[`import-attributes-with-parens.js [babel] format 1`] = `
 "Unexpected token, expected "{" (1:17)
 > 1 | import "x" with ({type: 'json'});
     |                 ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "{" (1:16)"
 `;
 
 exports[`invalid-escape-in-identifier.js [babel] format 1`] = `
@@ -44,21 +49,24 @@ exports[`invalid-escape-in-identifier.js [babel] format 1`] = `
 > 1 | const \\u{20} = 1
     |       ^
   2 | const \\u{3000} = 1
-  3 |"
+  3 |
+Cause: Invalid Unicode escape. (1:6)"
 `;
 
 exports[`invalid-escape-in-identifier-2.js [babel] format 1`] = `
 "Expecting Unicode escape sequence \\uXXXX. (1:3)
 > 1 | a\\ = a
     |   ^
-  2 |"
+  2 |
+Cause: Expecting Unicode escape sequence \\uXXXX. (1:2)"
 `;
 
 exports[`module-attributes.js [babel] format 1`] = `
 "Unexpected token, expected "{" (1:33)
 > 1 | import foo from "foo.json" with type: "json";
     |                                 ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "{" (1:32)"
 `;
 
 exports[`no-for-in-init-concise-binary-in.js [babel] format 1`] = `
@@ -67,7 +75,8 @@ exports[`no-for-in-init-concise-binary-in.js [babel] format 1`] = `
   2 |
 > 3 | for (() => x in y;;);
     |                  ^
-  4 |"
+  4 |
+Cause: Unexpected token, expected ")" (3:17)"
 `;
 
 exports[`partial-template-strings.js [babel] format 1`] = `
@@ -78,43 +87,50 @@ exports[`partial-template-strings.js [babel] format 1`] = `
     |                                          ^
   7 |   name_not_found: \`'\${?}' not found.\`
   8 | };
-  9 | Diagnostics.name_not_found("foo"); // "'foo' not found.""
+  9 | Diagnostics.name_not_found("foo"); // "'foo' not found."
+Cause: Unexpected token (6:41)"
 `;
 
 exports[`snippet: #0 [babel] format 1`] = `
 "Binding should be performed on object property. (1:3)
 > 1 | ::%DebugPrint(null)
-    |   ^"
+    |   ^
+Cause: Binding should be performed on object property. (1:2)"
 `;
 
 exports[`snippet: #1 [babel] format 1`] = `
 "Unexpected token (1:3)
 > 1 | a.%DebugPrint();
-    |   ^"
+    |   ^
+Cause: Unexpected token (1:2)"
 `;
 
 exports[`snippet: #2 [babel] format 1`] = `
 "Unexpected token (1:11)
 > 1 | const i = %DebugPrint;
-    |           ^"
+    |           ^
+Cause: Unexpected token (1:10)"
 `;
 
 exports[`snippet: #3 [babel] format 1`] = `
 "Unexpected token (1:7)
 > 1 | f(x + ?)
-    |       ^"
+    |       ^
+Cause: Unexpected token (1:6)"
 `;
 
 exports[`snippet: #4 [babel] format 1`] = `
 "Unexpected token (1:5)
 > 1 | x + ?
-    |     ^"
+    |     ^
+Cause: Unexpected token (1:4)"
 `;
 
 exports[`snippet: #5 [babel] format 1`] = `
 "Unexpected token (1:1)
 > 1 | ?.f()
-    | ^"
+    | ^
+Cause: Unexpected token (1:0)"
 `;
 
 exports[`snippet: #6 [babel] format 1`] = `
@@ -124,43 +140,50 @@ exports[`snippet: #6 [babel] format 1`] = `
 > 5 |     return try obj.#brand;
     |            ^
   6 |   }
-  7 | }"
+  7 | }
+Cause: Unexpected token (5:11)"
 `;
 
 exports[`snippet: #7 [babel] format 1`] = `
 "Unexpected token (1:7)
 > 1 | const #{ a, b } = #{ a: 1, b: 2 };
-    |       ^"
+    |       ^
+Cause: Unexpected token (1:6)"
 `;
 
 exports[`snippet: #8 [babel] format 1`] = `
 "Unexpected token (1:7)
 > 1 | const #[a, b] = #[1, 2];
-    |       ^"
+    |       ^
+Cause: Unexpected token (1:6)"
 `;
 
 exports[`snippet: #9 [babel] format 1`] = `
 "Unexpected token (1:2)
 > 1 | [| 1 |]
-    |  ^"
+    |  ^
+Cause: Unexpected token (1:1)"
 `;
 
 exports[`snippet: #10 [babel] format 1`] = `
 "Invalid decimal. (1:1)
 > 1 | 0b101011101m;
-    | ^"
+    | ^
+Cause: Invalid decimal. (1:0)"
 `;
 
 exports[`snippet: #11 [babel] format 1`] = `
 "Invalid decimal. (1:1)
 > 1 | 0x16432m;
-    | ^"
+    | ^
+Cause: Invalid decimal. (1:0)"
 `;
 
 exports[`snippet: #12 [babel] format 1`] = `
 "Invalid decimal. (1:1)
 > 1 | 0o16432m;
-    | ^"
+    | ^
+Cause: Invalid decimal. (1:0)"
 `;
 
 exports[`static-import-source-should-not-has-extra-token.js [babel] format 1`] = `
@@ -169,5 +192,6 @@ exports[`static-import-source-should-not-has-extra-token.js [babel] format 1`] =
   3 |
 > 4 | import {} from (('a'));
     |                ^
-  5 |"
+  5 |
+Cause: Unexpected token (4:15)"
 `;

tests/format/misc/errors/js/assignment/__snapshots__/jsfmt.spec.js.snap

@@ -3,59 +3,69 @@
 exports[`snippet: #0 [acorn] format 1`] = `
 "Assigning to rvalue (1:1)
 > 1 | ({}) = x;
-    | ^"
+    | ^
+Cause: Assigning to rvalue (1:0)"
 `;
 
 exports[`snippet: #0 [acorn] format 2`] = `
 "The keyword 'let' is reserved (1:21)
 > 1 | class Foo extends ((let)[0] = 1) {}
-    |                     ^"
+    |                     ^
+Cause: The keyword 'let' is reserved (1:20)"
 `;
 
 exports[`snippet: #0 [babel] format 1`] = `
 "Invalid parenthesized assignment pattern. (1:1)
 > 1 | ({}) = x;
-    | ^"
+    | ^
+Cause: Invalid parenthesized assignment pattern. (1:0)"
 `;
 
 exports[`snippet: #0 [babel-ts] format 1`] = `
 "Invalid parenthesized assignment pattern. (1:1)
 > 1 | ({}) = x;
-    | ^"
+    | ^
+Cause: Invalid parenthesized assignment pattern. (1:0)"
 `;
 
 exports[`snippet: #0 [espree] format 1`] = `
 "Assigning to rvalue (1:1)
 > 1 | ({}) = x;
-    | ^"
+    | ^
+Cause: Assigning to rvalue"
 `;
 
 exports[`snippet: #0 [espree] format 2`] = `
 "The keyword 'let' is reserved (1:21)
 > 1 | class Foo extends ((let)[0] = 1) {}
-    |                     ^"
+    |                     ^
+Cause: The keyword 'let' is reserved"
 `;
 
 exports[`snippet: #0 [espree] format 3`] = `
 "The keyword 'let' is reserved (1:18)
 > 1 | export default ((let)[0] = 1);
-    |                  ^"
+    |                  ^
+Cause: The keyword 'let' is reserved"
 `;
 
 exports[`snippet: #0 [meriyah] format 1`] = `
 "Invalid left-hand side in assignment (1:6)
 > 1 | ({}) = x;
-    |      ^"
+    |      ^
+Cause: [1:6]: Invalid left-hand side in assignment"
 `;
 
 exports[`snippet: #0 [meriyah] format 2`] = `
 "The identifier 'let' must not be in expression position in strict mode (1:24)
 > 1 | class Foo extends ((let)[0] = 1) {}
-    |                        ^"
+    |                        ^
+Cause: [1:24]: The identifier 'let' must not be in expression position in strict mode"
 `;
 
 exports[`snippet: #0 [meriyah] format 3`] = `
 "The identifier 'let' must not be in expression position in strict mode (1:21)
 > 1 | export default ((let)[0] = 1);
-    |                     ^"
+    |                     ^
+Cause: [1:21]: The identifier 'let' must not be in expression position in strict mode"
 `;

tests/format/misc/errors/js/async-await/__snapshots__/jsfmt.spec.js.snap

@@ -5,13 +5,15 @@ exports[`snippet: #0 [acorn] format 1`] = `
   1 | async function foo() {
 > 2 |   function bar(x = await 2) {}
     |                    ^
-  3 | }"
+  3 | }
+Cause: Cannot use keyword 'await' outside an async function (2:19)"
 `;
 
 exports[`snippet: #0 [acorn] format 2`] = `
 "Await expression cannot be a default value (1:12)
 > 1 | async (x = await (2)) => {};
-    |            ^"
+    |            ^
+Cause: Await expression cannot be a default value (1:11)"
 `;
 
 exports[`snippet: #0 [babel] format 1`] = `
@@ -19,13 +21,15 @@ exports[`snippet: #0 [babel] format 1`] = `
   1 | async function foo() {
 > 2 |   function bar(x = await 2) {}
     |                    ^
-  3 | }"
+  3 | }
+Cause: 'await' is only allowed within async functions and at the top levels of modules. (2:19)"
 `;
 
 exports[`snippet: #0 [babel] format 2`] = `
 "'await' is not allowed in async function parameters. (1:12)
 > 1 | async (x = await (2)) => {};
-    |            ^"
+    |            ^
+Cause: 'await' is not allowed in async function parameters. (1:11)"
 `;
 
 exports[`snippet: #0 [espree] format 1`] = `
@@ -33,13 +37,15 @@ exports[`snippet: #0 [espree] format 1`] = `
   1 | async function foo() {
 > 2 |   function bar(x = await 2) {}
     |                    ^
-  3 | }"
+  3 | }
+Cause: Cannot use keyword 'await' outside an async function"
 `;
 
 exports[`snippet: #0 [espree] format 2`] = `
 "Await expression cannot be a default value (1:12)
 > 1 | async (x = await (2)) => {};
-    |            ^"
+    |            ^
+Cause: Await expression cannot be a default value"
 `;
 
 exports[`snippet: #0 [flow] format 1`] = `
@@ -61,25 +67,29 @@ exports[`snippet: #0 [meriyah] format 1`] = `
   1 | async function foo() {
 > 2 |   function bar(x = await 2) {}
     |                        ^
-  3 | }"
+  3 | }
+Cause: [2:24]: Await is only valid in async functions"
 `;
 
 exports[`snippet: #1 [acorn] format 1`] = `
 "Await expression cannot be a default value (1:12)
 > 1 | async (x = await 2) => {};
-    |            ^"
+    |            ^
+Cause: Await expression cannot be a default value (1:11)"
 `;
 
 exports[`snippet: #1 [babel] format 1`] = `
 "'await' is not allowed in async function parameters. (1:12)
 > 1 | async (x = await 2) => {};
-    |            ^"
+    |            ^
+Cause: 'await' is not allowed in async function parameters. (1:11)"
 `;
 
 exports[`snippet: #1 [espree] format 1`] = `
 "Await expression cannot be a default value (1:12)
 > 1 | async (x = await 2) => {};
-    |            ^"
+    |            ^
+Cause: Await expression cannot be a default value"
 `;
 
 exports[`snippet: #1 [flow] format 1`] = `
@@ -91,25 +101,29 @@ exports[`snippet: #1 [flow] format 1`] = `
 exports[`snippet: #1 [meriyah] format 1`] = `
 "Await expression not allowed in formal parameter (1:22)
 > 1 | async (x = await 2) => {};
-    |                      ^"
+    |                      ^
+Cause: [1:22]: Await expression not allowed in formal parameter"
 `;
 
 exports[`snippet: #2 [acorn] format 1`] = `
 "Unexpected token (1:25)
 > 1 | f = async (a) => await a! ** 6;
-    |                         ^"
+    |                         ^
+Cause: Unexpected token (1:24)"
 `;
 
 exports[`snippet: #2 [babel] format 1`] = `
 "Unexpected token (1:27)
 > 1 | f = async (a) => await a! ** 6;
-    |                           ^"
+    |                           ^
+Cause: Unexpected token (1:26)"
 `;
 
 exports[`snippet: #2 [espree] format 1`] = `
 "Unexpected token ! (1:25)
 > 1 | f = async (a) => await a! ** 6;
-    |                         ^"
+    |                         ^
+Cause: Unexpected token !"
 `;
 
 exports[`snippet: #2 [flow] format 1`] = `
@@ -121,25 +135,29 @@ exports[`snippet: #2 [flow] format 1`] = `
 exports[`snippet: #2 [meriyah] format 1`] = `
 "Unexpected token: '!' (1:25)
 > 1 | f = async (a) => await a! ** 6;
-    |                         ^"
+    |                         ^
+Cause: [1:25]: Unexpected token: '!'"
 `;
 
 exports[`snippet: #3 [acorn] format 1`] = `
 "Unexpected token (1:14)
 > 1 | f = (a) => +a! ** 6;
-    |              ^"
+    |              ^
+Cause: Unexpected token (1:13)"
 `;
 
 exports[`snippet: #3 [babel] format 1`] = `
 "Unexpected token (1:16)
 > 1 | f = (a) => +a! ** 6;
-    |                ^"
+    |                ^
+Cause: Unexpected token (1:15)"
 `;
 
 exports[`snippet: #3 [espree] format 1`] = `
 "Unexpected token ! (1:14)
 > 1 | f = (a) => +a! ** 6;
-    |              ^"
+    |              ^
+Cause: Unexpected token !"
 `;
 
 exports[`snippet: #3 [flow] format 1`] = `
@@ -151,25 +169,29 @@ exports[`snippet: #3 [flow] format 1`] = `
 exports[`snippet: #3 [meriyah] format 1`] = `
 "Unexpected token: '!' (1:14)
 > 1 | f = (a) => +a! ** 6;
-    |              ^"
+    |              ^
+Cause: [1:14]: Unexpected token: '!'"
 `;
 
 exports[`snippet: #4 [acorn] format 1`] = `
 "Unexpected token (1:22)
 > 1 | async (a) => (await a!) ** 6;
-    |                      ^"
+    |                      ^
+Cause: Unexpected token (1:21)"
 `;
 
 exports[`snippet: #4 [babel] format 1`] = `
 "Unexpected token, expected "," (1:22)
 > 1 | async (a) => (await a!) ** 6;
-    |                      ^"
+    |                      ^
+Cause: Unexpected token, expected "," (1:21)"
 `;
 
 exports[`snippet: #4 [espree] format 1`] = `
 "Unexpected token ! (1:22)
 > 1 | async (a) => (await a!) ** 6;
-    |                      ^"
+    |                      ^
+Cause: Unexpected token !"
 `;
 
 exports[`snippet: #4 [flow] format 1`] = `
@@ -181,25 +203,29 @@ exports[`snippet: #4 [flow] format 1`] = `
 exports[`snippet: #4 [meriyah] format 1`] = `
 "Expected ')' (1:22)
 > 1 | async (a) => (await a!) ** 6;
-    |                      ^"
+    |                      ^
+Cause: [1:22]: Expected ')'"
 `;
 
 exports[`snippet: #5 [acorn] format 1`] = `
 "Unexpected token (1:6)
 > 1 | (-+5 ** 6);
-    |      ^"
+    |      ^
+Cause: Unexpected token (1:5)"
 `;
 
 exports[`snippet: #5 [babel] format 1`] = `
 "Illegal expression. Wrap left hand side or entire exponentiation in parentheses. (1:3)
 > 1 | (-+5 ** 6);
-    |   ^"
+    |   ^
+Cause: Illegal expression. Wrap left hand side or entire exponentiation in parentheses. (1:2)"
 `;
 
 exports[`snippet: #5 [espree] format 1`] = `
 "Unexpected token ** (1:6)
 > 1 | (-+5 ** 6);
-    |      ^"
+    |      ^
+Cause: Unexpected token **"
 `;
 
 exports[`snippet: #5 [flow] format 1`] = `
@@ -211,25 +237,29 @@ exports[`snippet: #5 [flow] format 1`] = `
 exports[`snippet: #5 [meriyah] format 1`] = `
 "Unary expressions as the left operand of an exponentiation expression must be disambiguated with parentheses (1:7)
 > 1 | (-+5 ** 6);
-    |       ^"
+    |       ^
+Cause: [1:7]: Unary expressions as the left operand of an exponentiation expression must be disambiguated with parentheses"
 `;
 
 exports[`snippet: #6 [acorn] format 1`] = `
 "Unexpected token (1:25)
 > 1 | f = async () => await 5 ** 6;
-    |                         ^"
+    |                         ^
+Cause: Unexpected token (1:24)"
 `;
 
 exports[`snippet: #6 [babel] format 1`] = `
 "Illegal expression. Wrap left hand side or entire exponentiation in parentheses. (1:23)
 > 1 | f = async () => await 5 ** 6;
-    |                       ^"
+    |                       ^
+Cause: Illegal expression. Wrap left hand side or entire exponentiation in parentheses. (1:22)"
 `;
 
 exports[`snippet: #6 [espree] format 1`] = `
 "Unexpected token ** (1:25)
 > 1 | f = async () => await 5 ** 6;
-    |                         ^"
+    |                         ^
+Cause: Unexpected token **"
 `;
 
 exports[`snippet: #6 [flow] format 1`] = `
@@ -241,25 +271,29 @@ exports[`snippet: #6 [flow] format 1`] = `
 exports[`snippet: #6 [meriyah] format 1`] = `
 "Unary expressions as the left operand of an exponentiation expression must be disambiguated with parentheses (1:26)
 > 1 | f = async () => await 5 ** 6;
-    |                          ^"
+    |                          ^
+Cause: [1:26]: Unary expressions as the left operand of an exponentiation expression must be disambiguated with parentheses"
 `;
 
 exports[`snippet: #7 [acorn] format 1`] = `
 "Unexpected token (1:26)
 > 1 | f = async () => await -5 ** 6;
-    |                          ^"
+    |                          ^
+Cause: Unexpected token (1:25)"
 `;
 
 exports[`snippet: #7 [babel] format 1`] = `
 "Illegal expression. Wrap left hand side or entire exponentiation in parentheses. (1:23)
 > 1 | f = async () => await -5 ** 6;
-    |                       ^"
+    |                       ^
+Cause: Illegal expression. Wrap left hand side or entire exponentiation in parentheses. (1:22)"
 `;
 
 exports[`snippet: #7 [espree] format 1`] = `
 "Unexpected token ** (1:26)
 > 1 | f = async () => await -5 ** 6;
-    |                          ^"
+    |                          ^
+Cause: Unexpected token **"
 `;
 
 exports[`snippet: #7 [flow] format 1`] = `
@@ -271,25 +305,29 @@ exports[`snippet: #7 [flow] format 1`] = `
 exports[`snippet: #7 [meriyah] format 1`] = `
 "Unary expressions as the left operand of an exponentiation expression must be disambiguated with parentheses (1:27)
 > 1 | f = async () => await -5 ** 6;
-    |                           ^"
+    |                           ^
+Cause: [1:27]: Unary expressions as the left operand of an exponentiation expression must be disambiguated with parentheses"
 `;
 
 exports[`snippet: #8 [acorn] format 1`] = `
 "Shorthand property assignments are valid only in destructuring patterns (1:15)
 > 1 | async({ foo33 = 1 });
-    |               ^"
+    |               ^
+Cause: Shorthand property assignments are valid only in destructuring patterns (1:14)"
 `;
 
 exports[`snippet: #8 [babel] format 1`] = `
 "Invalid shorthand property initializer. (1:15)
 > 1 | async({ foo33 = 1 });
-    |               ^"
+    |               ^
+Cause: Invalid shorthand property initializer. (1:14)"
 `;
 
 exports[`snippet: #8 [espree] format 1`] = `
 "Shorthand property assignments are valid only in destructuring patterns (1:15)
 > 1 | async({ foo33 = 1 });
-    |               ^"
+    |               ^
+Cause: Shorthand property assignments are valid only in destructuring patterns"
 `;
 
 exports[`snippet: #8 [flow] format 1`] = `
@@ -301,5 +339,6 @@ exports[`snippet: #8 [flow] format 1`] = `
 exports[`snippet: #8 [meriyah] format 1`] = `
 "Invalid shorthand property initializer (1:21)
 > 1 | async({ foo33 = 1 });
-    |                     ^"
+    |                     ^
+Cause: [1:21]: Invalid shorthand property initializer"
 `;

tests/format/misc/errors/js/decorators/__snapshots__/jsfmt.spec.js.snap

@@ -4,30 +4,35 @@ exports[`snippet: #0 [babel] format 1`] = `
 "Decorators can be placed *either* before or after the 'export' keyword, but not in both locations at the same time. (2:8)
   1 | @decorator1
 > 2 | export @decorator2 class A{}
-    |        ^"
+    |        ^
+Cause: Decorators can be placed *either* before or after the 'export' keyword, but not in both locations at the same time. (2:7)"
 `;
 
 exports[`snippet: #1 [babel] format 1`] = `
 "Decorators can be placed *either* before or after the 'export' keyword, but not in both locations at the same time. (2:16)
   1 | @decorator1
 > 2 | export default @decorator2 class A{}
-    |                ^"
+    |                ^
+Cause: Decorators can be placed *either* before or after the 'export' keyword, but not in both locations at the same time. (2:15)"
 `;
 
 exports[`snippet: #2 [babel] format 1`] = `
 "Decorators can be placed *either* before or after the 'export' keyword, but not in both locations at the same time. (1:20)
 > 1 | @decorator1 export @decorator2 class A {}
-    |                    ^"
+    |                    ^
+Cause: Decorators can be placed *either* before or after the 'export' keyword, but not in both locations at the same time. (1:19)"
 `;
 
 exports[`snippet: #3 [babel] format 1`] = `
 "Decorators can be placed *either* before or after the 'export' keyword, but not in both locations at the same time. (1:28)
 > 1 | @decorator1 export default @decorator2 class A {}
-    |                            ^"
+    |                            ^
+Cause: Decorators can be placed *either* before or after the 'export' keyword, but not in both locations at the same time. (1:27)"
 `;
 
 exports[`snippet: #4 [babel] format 1`] = `
 "Leading decorators must be attached to a class declaration. (1:20)
 > 1 | export @decorator2 default class A {}
-    |                    ^"
+    |                    ^
+Cause: Leading decorators must be attached to a class declaration. (1:19)"
 `;

tests/format/misc/errors/js/explicit-resource-management/__snapshots__/jsfmt.spec.js.snap

@@ -4,7 +4,8 @@ exports[`invalid-for-await-using-binding-of-of.js [babel] format 1`] = `
 "Unexpected token, expected ")" (1:24)
 > 1 | for await (using of of of);
     |                        ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected ")" (1:23)"
 `;
 
 exports[`invalid-for-await-using-binding-of-of.js [flow] format 1`] = `
@@ -18,7 +19,8 @@ exports[`invalid-for-using-binding-in.js [babel] format 1`] = `
 "For-in loop may not start with 'using' declaration. (1:6)
 > 1 | for (using foo in {});
     |      ^
-  2 |"
+  2 |
+Cause: For-in loop may not start with 'using' declaration. (1:5)"
 `;
 
 exports[`invalid-for-using-binding-in.js [flow] format 1`] = `
@@ -32,7 +34,8 @@ exports[`invalid-for-using-binding-of-in.js [babel] format 1`] = `
 "Unexpected token (1:15)
 > 1 | for (using of in []);
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`invalid-for-using-binding-of-in.js [flow] format 1`] = `
@@ -46,7 +49,8 @@ exports[`invalid-for-using-binding-of-of.js [babel] format 1`] = `
 "Unexpected token, expected ")" (1:18)
 > 1 | for (using of of of);
     |                  ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected ")" (1:17)"
 `;
 
 exports[`invalid-for-using-binding-of-of.js [flow] format 1`] = `
@@ -62,7 +66,8 @@ exports[`invalid-using-binding-let.js [babel] format 1`] = `
 > 2 |   using let = h();
     |         ^
   3 | }
-  4 |"
+  4 |
+Cause: 'let' is disallowed as a lexically bound name. (2:8)"
 `;
 
 exports[`invalid-using-binding-let.js [flow] format 1`] = `
@@ -81,7 +86,8 @@ exports[`invalid-using-binding-pattern.js [babel] format 1`] = `
     |                 ^
   3 |   using [ bar ] = g();
   4 |   for (using { qux } of h());
-  5 |   for (using [ quux ] of i());"
+  5 |   for (using [ quux ] of i());
+Cause: Unexpected token (2:16)"
 `;
 
 exports[`invalid-using-binding-pattern.js [flow] format 1`] = `

tests/format/misc/errors/js/export-default-from/__snapshots__/jsfmt.spec.js.snap

@@ -3,23 +3,27 @@
 exports[`snippet: #0 [babel] format 1`] = `
 "Unexpected token (1:9)
 > 1 | export *, {} from "foo";
-    |         ^"
+    |         ^
+Cause: Unexpected token (1:8)"
 `;
 
 exports[`snippet: #1 [babel] format 1`] = `
 "Unexpected token, expected "from" (1:21)
 > 1 | export * as foo, {} from "foo";
-    |                     ^"
+    |                     ^
+Cause: Unexpected token, expected "from" (1:20)"
 `;
 
 exports[`snippet: #2 [babel] format 1`] = `
 "Unexpected token (1:9)
 > 1 | export *, {bar} from "foo";
-    |         ^"
+    |         ^
+Cause: Unexpected token (1:8)"
 `;
 
 exports[`snippet: #3 [babel] format 1`] = `
 "Unexpected token, expected "from" (1:24)
 > 1 | export * as foo, {bar} from "foo";
-    |                        ^"
+    |                        ^
+Cause: Unexpected token, expected "from" (1:23)"
 `;

tests/format/misc/errors/js/for-of/__snapshots__/jsfmt.spec.js.snap

@@ -3,55 +3,64 @@
 exports[`snippet: #0 [acorn] format 1`] = `
 "Unexpected token (1:15)
 > 1 | for (async of []);
-    |               ^"
+    |               ^
+Cause: Unexpected token (1:14)"
 `;
 
 exports[`snippet: #0 [babel] format 1`] = `
 "The left-hand side of a for-of loop may not start with 'let'. (1:6)
 > 1 | for (let.foo of []);
-    |      ^"
+    |      ^
+Cause: The left-hand side of a for-of loop may not start with 'let'. (1:5)"
 `;
 
 exports[`snippet: #0 [babel] format 2`] = `
 "The left-hand side of a for-of loop may not be 'async'. (1:6)
 > 1 | for (async of []);
-    |      ^"
+    |      ^
+Cause: The left-hand side of a for-of loop may not be 'async'. (1:5)"
 `;
 
 exports[`snippet: #0 [babel-flow] format 1`] = `
 "The left-hand side of a for-of loop may not start with 'let'. (1:6)
 > 1 | for (let.foo of []);
-    |      ^"
+    |      ^
+Cause: The left-hand side of a for-of loop may not start with 'let'. (1:5)"
 `;
 
 exports[`snippet: #0 [babel-flow] format 2`] = `
 "The left-hand side of a for-of loop may not be 'async'. (1:6)
 > 1 | for (async of []);
-    |      ^"
+    |      ^
+Cause: The left-hand side of a for-of loop may not be 'async'. (1:5)"
 `;
 
 exports[`snippet: #0 [babel-ts] format 1`] = `
 "The left-hand side of a for-of loop may not start with 'let'. (1:6)
 > 1 | for (let.foo of []);
-    |      ^"
+    |      ^
+Cause: The left-hand side of a for-of loop may not start with 'let'. (1:5)"
 `;
 
 exports[`snippet: #0 [babel-ts] format 2`] = `
 "The left-hand side of a for-of loop may not be 'async'. (1:6)
 > 1 | for (async of []);
-    |      ^"
+    |      ^
+Cause: The left-hand side of a for-of loop may not be 'async'. (1:5)"
 `;
 
 exports[`snippet: #0 [espree] format 1`] = `
 "The keyword 'let' is reserved (1:6)
 > 1 | for (let.foo of []);
-    |      ^"
+    |      ^
+Cause: The keyword 'let' is reserved"
 `;
 
 exports[`snippet: #0 [espree] format 2`] = `
 "Unexpected token [ (1:15)
 > 1 | for (async of []);
-    |               ^"
+    |               ^
+Cause: Unexpected token ["
 `;
 
 exports[`snippet: #0 [flow] format 1`] = `
@@ -69,37 +78,43 @@ exports[`snippet: #0 [flow] format 2`] = `
 exports[`snippet: #0 [meriyah] format 1`] = `
 "Identifier "let" disallowed as left-hand side expression in strict mode (1:9)
 > 1 | for (let.foo of []);
-    |         ^"
+    |         ^
+Cause: [1:9]: Identifier "let" disallowed as left-hand side expression in strict mode"
 `;
 
 exports[`snippet: #0 [typescript] format 1`] = `
 "Variable declaration expected. (1:9)
 > 1 | for (let.foo of []);
-    |         ^"
+    |         ^
+Cause: Variable declaration expected."
 `;
 
 exports[`snippet: #1 [babel] format 1`] = `
 "The left-hand side of a for-of loop may not start with 'let'. (1:6)
 > 1 | for (let().bar of []);
-    |      ^"
+    |      ^
+Cause: The left-hand side of a for-of loop may not start with 'let'. (1:5)"
 `;
 
 exports[`snippet: #1 [babel-flow] format 1`] = `
 "The left-hand side of a for-of loop may not start with 'let'. (1:6)
 > 1 | for (let().bar of []);
-    |      ^"
+    |      ^
+Cause: The left-hand side of a for-of loop may not start with 'let'. (1:5)"
 `;
 
 exports[`snippet: #1 [babel-ts] format 1`] = `
 "The left-hand side of a for-of loop may not start with 'let'. (1:6)
 > 1 | for (let().bar of []);
-    |      ^"
+    |      ^
+Cause: The left-hand side of a for-of loop may not start with 'let'. (1:5)"
 `;
 
 exports[`snippet: #1 [espree] format 1`] = `
 "The keyword 'let' is reserved (1:6)
 > 1 | for (let().bar of []);
-    |      ^"
+    |      ^
+Cause: The keyword 'let' is reserved"
 `;
 
 exports[`snippet: #1 [flow] format 1`] = `
@@ -111,37 +126,43 @@ exports[`snippet: #1 [flow] format 1`] = `
 exports[`snippet: #1 [meriyah] format 1`] = `
 "Identifier "let" disallowed as left-hand side expression in strict mode (1:9)
 > 1 | for (let().bar of []);
-    |         ^"
+    |         ^
+Cause: [1:9]: Identifier "let" disallowed as left-hand side expression in strict mode"
 `;
 
 exports[`snippet: #1 [typescript] format 1`] = `
 "Variable declaration expected. (1:9)
 > 1 | for (let().bar of []);
-    |         ^"
+    |         ^
+Cause: Variable declaration expected."
 `;
 
 exports[`snippet: #2 [babel] format 1`] = `
 "The left-hand side of a for-of loop may not start with 'let'. (1:6)
 > 1 | for (let\`\`.bar of []);
-    |      ^"
+    |      ^
+Cause: The left-hand side of a for-of loop may not start with 'let'. (1:5)"
 `;
 
 exports[`snippet: #2 [babel-flow] format 1`] = `
 "The left-hand side of a for-of loop may not start with 'let'. (1:6)
 > 1 | for (let\`\`.bar of []);
-    |      ^"
+    |      ^
+Cause: The left-hand side of a for-of loop may not start with 'let'. (1:5)"
 `;
 
 exports[`snippet: #2 [babel-ts] format 1`] = `
 "The left-hand side of a for-of loop may not start with 'let'. (1:6)
 > 1 | for (let\`\`.bar of []);
-    |      ^"
+    |      ^
+Cause: The left-hand side of a for-of loop may not start with 'let'. (1:5)"
 `;
 
 exports[`snippet: #2 [espree] format 1`] = `
 "The keyword 'let' is reserved (1:6)
 > 1 | for (let\`\`.bar of []);
-    |      ^"
+    |      ^
+Cause: The keyword 'let' is reserved"
 `;
 
 exports[`snippet: #2 [flow] format 1`] = `
@@ -153,11 +174,13 @@ exports[`snippet: #2 [flow] format 1`] = `
 exports[`snippet: #2 [meriyah] format 1`] = `
 "Identifier "let" disallowed as left-hand side expression in strict mode (1:10)
 > 1 | for (let\`\`.bar of []);
-    |          ^"
+    |          ^
+Cause: [1:10]: Identifier "let" disallowed as left-hand side expression in strict mode"
 `;
 
 exports[`snippet: #2 [typescript] format 1`] = `
 "Variable declaration expected. (1:9)
 > 1 | for (let\`\`.bar of []);
-    |         ^"
+    |         ^
+Cause: Variable declaration expected."
 `;

tests/format/misc/errors/js/hack-pipeline/__snapshots__/jsfmt.spec.js.snap

@@ -3,66 +3,77 @@
 exports[`snippet: #0 [babel] format 1`] = `
 "Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:39)
 > 1 | async function * a() { a |> foo(%) |> (yield y)}
-    |                                       ^"
+    |                                       ^
+Cause: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:38)"
 `;
 
 exports[`snippet: #1 [babel] format 1`] = `
 "Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:39)
 > 1 | async function * a() { a |> foo(%) |> (yield)}
-    |                                       ^"
+    |                                       ^
+Cause: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:38)"
 `;
 
 exports[`snippet: #2 [babel] format 1`] = `
 "Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:39)
 > 1 | async function * a() { a |> foo(%) |> (await y)}
-    |                                       ^"
+    |                                       ^
+Cause: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:38)"
 `;
 
 exports[`snippet: #3 [babel] format 1`] = `
 "Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:39)
 > 1 | async function * a() { a |> foo(%) |> (a?.b)}
-    |                                       ^"
+    |                                       ^
+Cause: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:38)"
 `;
 
 exports[`snippet: #4 [babel] format 1`] = `
 "Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:39)
 > 1 | async function * a() { a |> foo(%) |> a?.b}
-    |                                       ^"
+    |                                       ^
+Cause: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:38)"
 `;
 
 exports[`snippet: #5 [babel] format 1`] = `
 "Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:39)
 > 1 | async function * a() { a |> foo(%) |> (a.b())}
-    |                                       ^"
+    |                                       ^
+Cause: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:38)"
 `;
 
 exports[`snippet: #6 [babel] format 1`] = `
 "Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:39)
 > 1 | async function * a() { a |> foo(%) |> a.b()}
-    |                                       ^"
+    |                                       ^
+Cause: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:38)"
 `;
 
 exports[`snippet: #7 [babel] format 1`] = `
 "Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:39)
 > 1 | async function * a() { a |> foo(%) |> (a.b?.())}
-    |                                       ^"
+    |                                       ^
+Cause: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:38)"
 `;
 
 exports[`snippet: #8 [babel] format 1`] = `
 "Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:39)
 > 1 | async function * a() { a |> foo(%) |> a.b?.()}
-    |                                       ^"
+    |                                       ^
+Cause: Hack-style pipe body does not contain a topic reference; Hack-style pipes must use topic at least once. (1:38)"
 `;
 
 exports[`snippet: #9 [babel] format 1`] = `
 "Hack-style pipe body cannot be an unparenthesized yield expression; please wrap it in parentheses. (1:39)
 > 1 | async function * a() { a |> foo(%) |> yield}
-    |                                       ^"
+    |                                       ^
+Cause: Hack-style pipe body cannot be an unparenthesized yield expression; please wrap it in parentheses. (1:38)"
 `;
 
 exports[`v8intrinsic.js [babel] format 1`] = `
 "Topic reference is unbound; it must be inside a pipe body. (1:16)
 > 1 | const status = %GetOptimizationStatus(fn) |> console.log(%);
     |                ^
-  2 |"
+  2 |
+Cause: Topic reference is unbound; it must be inside a pipe body. (1:15)"
 `;

tests/format/misc/errors/js/import-assertions/__snapshots__/jsfmt.spec.js.snap

@@ -4,89 +4,102 @@ exports[`invalid-default-named-import.mjs [babel] format 1`] = `
 "Only \`import module x from "./module"\` is valid. (1:15)
 > 1 | import module foo, {bar} from "./module.wasm";
     |               ^
-  2 |"
+  2 |
+Cause: Only \`import module x from "./module"\` is valid. (1:14)"
 `;
 
 exports[`invalid-export-from.mjs [babel] format 1`] = `
 "Unexpected token, expected "{" (1:8)
 > 1 | export module x from "./module.wasm";
     |        ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "{" (1:7)"
 `;
 
 exports[`invalid-flow-type-import-1.mjs [babel] format 1`] = `
 "Unexpected token, expected "from" (1:13)
 > 1 | import type module foo from "./module.wasm";
     |             ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "from" (1:12)"
 `;
 
 exports[`invalid-flow-type-import-2.mjs [babel] format 1`] = `
 "Unexpected token, expected "from" (1:20)
 > 1 | import module type foo from "./module.wasm";
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "from" (1:19)"
 `;
 
 exports[`invalid-flow-typeof-import-1.mjs [babel] format 1`] = `
 "Unexpected token, expected "from" (1:15)
 > 1 | import typeof module foo from "./module.wasm";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "from" (1:14)"
 `;
 
 exports[`invalid-flow-typeof-import-2.mjs [babel] format 1`] = `
 "Unexpected token, expected "from" (1:22)
 > 1 | import module typeof foo from "./module.wasm";
     |                      ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "from" (1:21)"
 `;
 
 exports[`invalid-identifier-source.mjs [babel] format 1`] = `
 "Unexpected token, expected "from" (1:20)
 > 1 | import module from foo
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "from" (1:19)"
 `;
 
 exports[`invalid-module-escape.mjs [babel] format 1`] = `
 "Unexpected token, expected "from" (1:20)
 > 1 | import modul\\u0065 foo from "./module.wasm";
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "from" (1:19)"
 `;
 
 exports[`invalid-module-source.mjs [babel] format 1`] = `
 "Unexpected token, expected "{" (1:15)
 > 1 | import module "foo";
     |               ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "{" (1:14)"
 `;
 
 exports[`invalid-named-import.mjs [babel] format 1`] = `
 "Only \`import module x from "./module"\` is valid. (1:17)
 > 1 | import module { foo } from "./module.wasm";
     |                 ^
-  2 |"
+  2 |
+Cause: Only \`import module x from "./module"\` is valid. (1:16)"
 `;
 
 exports[`invalid-namespace-import.mjs [babel] format 1`] = `
 "Only \`import module x from "./module"\` is valid. (1:15)
 > 1 | import module * as foo from "./module.wasm";
     |               ^
-  2 |"
+  2 |
+Cause: Only \`import module x from "./module"\` is valid. (1:14)"
 `;
 
 exports[`invalid-ts-type-import-1.mts [babel] format 1`] = `
 "Unexpected token, expected "from" (1:13)
 > 1 | import type module foo from "./module.wasm";
     |             ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "from" (1:12)"
 `;
 
 exports[`invalid-ts-type-import-2.mts [babel] format 1`] = `
 "Unexpected token, expected "from" (1:20)
 > 1 | import module type foo from "./module.wasm";
     |                    ^
-  2 |"
+  2 |
+Cause: Unexpected token, expected "from" (1:19)"
 `;

tests/format/misc/errors/js/import/__snapshots__/jsfmt.spec.js.snap

@@ -3,19 +3,22 @@
 exports[`snippet: #0 [babel] format 1`] = `
 "Unexpected token (1:8)
 > 1 | import();
-    |        ^"
+    |        ^
+Cause: Unexpected token (1:7)"
 `;
 
 exports[`snippet: #0 [babel-flow] format 1`] = `
 "Unexpected token (1:8)
 > 1 | import();
-    |        ^"
+    |        ^
+Cause: Unexpected token (1:7)"
 `;
 
 exports[`snippet: #0 [babel-ts] format 1`] = `
 "Unexpected token (1:8)
 > 1 | import();
-    |        ^"
+    |        ^
+Cause: Unexpected token (1:7)"
 `;
 
 exports[`snippet: #0 [flow] format 1`] = `
@@ -27,31 +30,36 @@ exports[`snippet: #0 [flow] format 1`] = `
 exports[`snippet: #0 [meriyah] format 1`] = `
 "Unexpected token: ')' (1:8)
 > 1 | import();
-    |        ^"
+    |        ^
+Cause: [1:8]: Unexpected token: ')'"
 `;
 
 exports[`snippet: #0 [typescript] format 1`] = `
 "Dynamic import requires exactly one or two arguments. (1:1)
 > 1 | import();
-    | ^^^^^^^^"
+    | ^^^^^^^^
+Cause: Dynamic import requires exactly one or two arguments."
 `;
 
 exports[`snippet: #1 [babel] format 1`] = `
 "Unexpected token (1:21)
 > 1 | import(/* comment */);
-    |                     ^"
+    |                     ^
+Cause: Unexpected token (1:20)"
 `;
 
 exports[`snippet: #1 [babel-flow] format 1`] = `
 "Unexpected token (1:21)
 > 1 | import(/* comment */);
-    |                     ^"
+    |                     ^
+Cause: Unexpected token (1:20)"
 `;
 
 exports[`snippet: #1 [babel-ts] format 1`] = `
 "Unexpected token (1:21)
 > 1 | import(/* comment */);
-    |                     ^"
+    |                     ^
+Cause: Unexpected token (1:20)"
 `;
 
 exports[`snippet: #1 [flow] format 1`] = `
@@ -63,31 +71,36 @@ exports[`snippet: #1 [flow] format 1`] = `
 exports[`snippet: #1 [meriyah] format 1`] = `
 "Unexpected token: ')' (1:21)
 > 1 | import(/* comment */);
-    |                     ^"
+    |                     ^
+Cause: [1:21]: Unexpected token: ')'"
 `;
 
 exports[`snippet: #1 [typescript] format 1`] = `
 "Dynamic import requires exactly one or two arguments. (1:1)
 > 1 | import(/* comment */);
-    | ^^^^^^^^^^^^^^^^^^^^^"
+    | ^^^^^^^^^^^^^^^^^^^^^
+Cause: Dynamic import requires exactly one or two arguments."
 `;
 
 exports[`snippet: #2 [babel] format 1`] = `
 "Cannot use new with import(...). (1:5)
 > 1 | new import('./a.mjs');
-    |     ^"
+    |     ^
+Cause: Cannot use new with import(...). (1:4)"
 `;
 
 exports[`snippet: #2 [babel-flow] format 1`] = `
 "Cannot use new with import(...). (1:5)
 > 1 | new import('./a.mjs');
-    |     ^"
+    |     ^
+Cause: Cannot use new with import(...). (1:4)"
 `;
 
 exports[`snippet: #2 [babel-ts] format 1`] = `
 "Cannot use new with import(...). (1:5)
 > 1 | new import('./a.mjs');
-    |     ^"
+    |     ^
+Cause: Cannot use new with import(...). (1:4)"
 `;
 
 exports[`snippet: #2 [flow] format 1`] = `
@@ -99,31 +112,36 @@ exports[`snippet: #2 [flow] format 1`] = `
 exports[`snippet: #2 [meriyah] format 1`] = `
 "Cannot use new with import(...) (1:11)
 > 1 | new import('./a.mjs');
-    |           ^"
+    |           ^
+Cause: [1:11]: Cannot use new with import(...)"
 `;
 
 exports[`snippet: #2 [typescript] format 1`] = `
 "Expression expected. (1:5)
 > 1 | new import('./a.mjs');
-    |     ^"
+    |     ^
+Cause: Expression expected."
 `;
 
 exports[`snippet: #3 [babel] format 1`] = `
 "Unexpected token (1:12)
 > 1 | new import();
-    |            ^"
+    |            ^
+Cause: Unexpected token (1:11)"
 `;
 
 exports[`snippet: #3 [babel-flow] format 1`] = `
 "Unexpected token (1:12)
 > 1 | new import();
-    |            ^"
+    |            ^
+Cause: Unexpected token (1:11)"
 `;
 
 exports[`snippet: #3 [babel-ts] format 1`] = `
 "Unexpected token (1:12)
 > 1 | new import();
-    |            ^"
+    |            ^
+Cause: Unexpected token (1:11)"
 `;
 
 exports[`snippet: #3 [flow] format 1`] = `
@@ -135,11 +153,13 @@ exports[`snippet: #3 [flow] format 1`] = `
 exports[`snippet: #3 [meriyah] format 1`] = `
 "Cannot use new with import(...) (1:11)
 > 1 | new import();
-    |           ^"
+    |           ^
+Cause: [1:11]: Cannot use new with import(...)"
 `;
 
 exports[`snippet: #3 [typescript] format 1`] = `
 "Expression expected. (1:5)
 > 1 | new import();
-    |     ^"
+    |     ^
+Cause: Expression expected."
 `;

tests/format/misc/errors/js/known-source-type/__snapshots__/jsfmt.spec.js.snap

@@ -3,53 +3,62 @@
 exports[`snippet: #0 [acorn] format 1`] = `
 "'import' and 'export' may appear only with 'sourceType: module' (1:1)
 > 1 | import "foo"
-    | ^"
+    | ^
+Cause: 'import' and 'export' may appear only with 'sourceType: module' (1:0)"
 `;
 
 exports[`snippet: #0 [espree] format 1`] = `
 "'import' and 'export' may appear only with 'sourceType: module' (1:1)
 > 1 | import "foo"
-    | ^"
+    | ^
+Cause: 'import' and 'export' may appear only with 'sourceType: module'"
 `;
 
 exports[`snippet: #0 [meriyah] format 1`] = `
 "The import keyword can only be used with the module goal (1:12)
 > 1 | import "foo"
-    |            ^"
+    |            ^
+Cause: [1:12]: The import keyword can only be used with the module goal"
 `;
 
 exports[`snippet: #1 [acorn] format 1`] = `
 "'with' in strict mode (1:1)
 > 1 | with(foo) {}
-    | ^"
+    | ^
+Cause: 'with' in strict mode (1:0)"
 `;
 
 exports[`snippet: #1 [espree] format 1`] = `
 "'with' in strict mode (1:1)
 > 1 | with(foo) {}
-    | ^"
+    | ^
+Cause: 'with' in strict mode"
 `;
 
 exports[`snippet: #1 [meriyah] format 1`] = `
 "Strict mode code may not include a with statement (1:5)
 > 1 | with(foo) {}
-    |     ^"
+    |     ^
+Cause: [1:5]: Strict mode code may not include a with statement"
 `;
 
 exports[`snippet: #2 [acorn] format 1`] = `
 "Deleting local variable in strict mode (1:1)
 > 1 | delete foo
-    | ^"
+    | ^
+Cause: Deleting local variable in strict mode (1:0)"
 `;
 
 exports[`snippet: #2 [espree] format 1`] = `
 "Deleting local variable in strict mode (1:1)
 > 1 | delete foo
-    | ^"
+    | ^
+Cause: Deleting local variable in strict mode"
 `;
 
 exports[`snippet: #2 [meriyah] format 1`] = `
 "Calling delete on expression not allowed in strict mode (1:10)
 > 1 | delete foo
-    |          ^"
+    |          ^
+Cause: [1:10]: Calling delete on expression not allowed in strict mode"
 `;

tests/format/misc/errors/js/literal/__snapshots__/jsfmt.spec.js.snap

@@ -4,26 +4,30 @@ exports[`invalid-exponent.js [acorn] format 1`] = `
 "Invalid number (1:1)
 > 1 | 12.3e
     | ^
-  2 |"
+  2 |
+Cause: Invalid number (1:0)"
 `;
 
 exports[`invalid-exponent.js [babel] format 1`] = `
 "Floating-point numbers require a valid exponent after the 'e'. (1:1)
 > 1 | 12.3e
     | ^
-  2 |"
+  2 |
+Cause: Floating-point numbers require a valid exponent after the 'e'. (1:0)"
 `;
 
 exports[`invalid-exponent.js [espree] format 1`] = `
 "Invalid number (1:1)
 > 1 | 12.3e
     | ^
-  2 |"
+  2 |
+Cause: Invalid number"
 `;
 
 exports[`invalid-exponent.js [meriyah] format 1`] = `
 "Non-number found after exponent indicator (1:5)
 > 1 | 12.3e
     |     ^
-  2 |"
+  2 |
+Cause: [1:5]: Non-number found after exponent indicator"
 `;

tests/format/misc/errors/js/object/__snapshots__/jsfmt.spec.js.snap

@@ -6,7 +6,8 @@ exports[`getter-generator.js [acorn] format 1`] = `
 > 2 |     get *iterator() { },
     |         ^
   3 | });
-  4 |"
+  4 |
+Cause: Unexpected token (2:8)"
 `;
 
 exports[`getter-generator.js [babel] format 1`] = `
@@ -15,7 +16,8 @@ exports[`getter-generator.js [babel] format 1`] = `
 > 2 |     get *iterator() { },
     |          ^
   3 | });
-  4 |"
+  4 |
+Cause: A getter cannot be a generator. (2:9)"
 `;
 
 exports[`getter-generator.js [espree] format 1`] = `
@@ -24,7 +26,8 @@ exports[`getter-generator.js [espree] format 1`] = `
 > 2 |     get *iterator() { },
     |         ^
   3 | });
-  4 |"
+  4 |
+Cause: Unexpected token *"
 `;
 
 exports[`getter-generator.js [meriyah] format 1`] = `
@@ -33,35 +36,40 @@ exports[`getter-generator.js [meriyah] format 1`] = `
 > 2 |     get *iterator() { },
     |         ^
   3 | });
-  4 |"
+  4 |
+Cause: [2:9]: A getter cannot be a generator"
 `;
 
 exports[`getter-with-parameter.js [acorn] format 1`] = `
 "getter should have no params (1:9)
 > 1 | ({ get x(a){} });
     |         ^
-  2 |"
+  2 |
+Cause: getter should have no params (1:8)"
 `;
 
 exports[`getter-with-parameter.js [babel] format 1`] = `
 "A 'get' accessor must not have any formal parameters. (1:4)
 > 1 | ({ get x(a){} });
     |    ^
-  2 |"
+  2 |
+Cause: A 'get' accessor must not have any formal parameters. (1:3)"
 `;
 
 exports[`getter-with-parameter.js [espree] format 1`] = `
 "getter should have no params (1:9)
 > 1 | ({ get x(a){} });
     |         ^
-  2 |"
+  2 |
+Cause: getter should have no params"
 `;
 
 exports[`getter-with-parameter.js [meriyah] format 1`] = `
 "Getter functions must have exactly no arguments (1:10)
 > 1 | ({ get x(a){} });
     |          ^
-  2 |"
+  2 |
+Cause: [1:10]: Getter functions must have exactly no arguments"
 `;
 
 exports[`setter-generator.js [acorn] format 1`] = `
@@ -70,7 +78,8 @@ exports[`setter-generator.js [acorn] format 1`] = `
 > 2 |     set *iterator(iter) { },
     |         ^
   3 | });
-  4 |"
+  4 |
+Cause: Unexpected token (2:8)"
 `;
 
 exports[`setter-generator.js [babel] format 1`] = `
@@ -79,7 +88,8 @@ exports[`setter-generator.js [babel] format 1`] = `
 > 2 |     set *iterator(iter) { },
     |          ^
   3 | });
-  4 |"
+  4 |
+Cause: A setter cannot be a generator. (2:9)"
 `;
 
 exports[`setter-generator.js [espree] format 1`] = `
@@ -88,7 +98,8 @@ exports[`setter-generator.js [espree] format 1`] = `
 > 2 |     set *iterator(iter) { },
     |         ^
   3 | });
-  4 |"
+  4 |
+Cause: Unexpected token *"
 `;
 
 exports[`setter-generator.js [meriyah] format 1`] = `
@@ -97,33 +108,38 @@ exports[`setter-generator.js [meriyah] format 1`] = `
 > 2 |     set *iterator(iter) { },
     |         ^
   3 | });
-  4 |"
+  4 |
+Cause: [2:9]: A setter cannot be a generator"
 `;
 
 exports[`setter-without-parameter.js [acorn] format 1`] = `
 "setter should have exactly one param (1:9)
 > 1 | ({ set x(){} });
     |         ^
-  2 |"
+  2 |
+Cause: setter should have exactly one param (1:8)"
 `;
 
 exports[`setter-without-parameter.js [babel] format 1`] = `
 "A 'set' accessor must have exactly one formal parameter. (1:4)
 > 1 | ({ set x(){} });
     |    ^
-  2 |"
+  2 |
+Cause: A 'set' accessor must have exactly one formal parameter. (1:3)"
 `;
 
 exports[`setter-without-parameter.js [espree] format 1`] = `
 "setter should have exactly one param (1:9)
 > 1 | ({ set x(){} });
     |         ^
-  2 |"
+  2 |
+Cause: setter should have exactly one param"
 `;
 
 exports[`setter-without-parameter.js [meriyah] format 1`] = `
 "Setter functions must have exactly one argument (1:10)
 > 1 | ({ set x(){} });
     |          ^
-  2 |"
+  2 |
+Cause: [1:10]: Setter functions must have exactly one argument"
 `;

tests/format/misc/errors/js/optional-chaining/__snapshots__/jsfmt.spec.js.snap

@@ -3,97 +3,113 @@
 exports[`snippet: #0 [acorn] format 1`] = `
 "Optional chaining cannot appear in the callee of new expressions (1:21)
 > 1 | const baz3 = new obj?.foo?.bar?.baz(); // baz instance
-    |                     ^"
+    |                     ^
+Cause: Optional chaining cannot appear in the callee of new expressions (1:20)"
 `;
 
 exports[`snippet: #0 [babel] format 1`] = `
 "Constructors in/after an Optional Chain are not allowed. (1:21)
 > 1 | const baz3 = new obj?.foo?.bar?.baz(); // baz instance
-    |                     ^"
+    |                     ^
+Cause: Constructors in/after an Optional Chain are not allowed. (1:20)"
 `;
 
 exports[`snippet: #0 [espree] format 1`] = `
 "Optional chaining cannot appear in the callee of new expressions (1:21)
 > 1 | const baz3 = new obj?.foo?.bar?.baz(); // baz instance
-    |                     ^"
+    |                     ^
+Cause: Optional chaining cannot appear in the callee of new expressions"
 `;
 
 exports[`snippet: #0 [meriyah] format 1`] = `
 "Invalid optional chain from new expression (1:22)
 > 1 | const baz3 = new obj?.foo?.bar?.baz(); // baz instance
-    |                      ^"
+    |                      ^
+Cause: [1:22]: Invalid optional chain from new expression"
 `;
 
 exports[`snippet: #1 [acorn] format 1`] = `
 "Optional chaining cannot appear in the callee of new expressions (1:22)
 > 1 | const safe5 = new obj?.qux?.baz(); // undefined
-    |                      ^"
+    |                      ^
+Cause: Optional chaining cannot appear in the callee of new expressions (1:21)"
 `;
 
 exports[`snippet: #1 [babel] format 1`] = `
 "Constructors in/after an Optional Chain are not allowed. (1:22)
 > 1 | const safe5 = new obj?.qux?.baz(); // undefined
-    |                      ^"
+    |                      ^
+Cause: Constructors in/after an Optional Chain are not allowed. (1:21)"
 `;
 
 exports[`snippet: #1 [espree] format 1`] = `
 "Optional chaining cannot appear in the callee of new expressions (1:22)
 > 1 | const safe5 = new obj?.qux?.baz(); // undefined
-    |                      ^"
+    |                      ^
+Cause: Optional chaining cannot appear in the callee of new expressions"
 `;
 
 exports[`snippet: #1 [meriyah] format 1`] = `
 "Invalid optional chain from new expression (1:23)
 > 1 | const safe5 = new obj?.qux?.baz(); // undefined
-    |                       ^"
+    |                       ^
+Cause: [1:23]: Invalid optional chain from new expression"
 `;
 
 exports[`snippet: #2 [acorn] format 1`] = `
 "Optional chaining cannot appear in the callee of new expressions (1:22)
 > 1 | const safe6 = new obj?.foo.bar.qux?.(); // undefined
-    |                      ^"
+    |                      ^
+Cause: Optional chaining cannot appear in the callee of new expressions (1:21)"
 `;
 
 exports[`snippet: #2 [babel] format 1`] = `
 "Constructors in/after an Optional Chain are not allowed. (1:22)
 > 1 | const safe6 = new obj?.foo.bar.qux?.(); // undefined
-    |                      ^"
+    |                      ^
+Cause: Constructors in/after an Optional Chain are not allowed. (1:21)"
 `;
 
 exports[`snippet: #2 [espree] format 1`] = `
 "Optional chaining cannot appear in the callee of new expressions (1:22)
 > 1 | const safe6 = new obj?.foo.bar.qux?.(); // undefined
-    |                      ^"
+    |                      ^
+Cause: Optional chaining cannot appear in the callee of new expressions"
 `;
 
 exports[`snippet: #2 [meriyah] format 1`] = `
 "Invalid optional chain from new expression (1:23)
 > 1 | const safe6 = new obj?.foo.bar.qux?.(); // undefined
-    |                       ^"
+    |                       ^
+Cause: [1:23]: Invalid optional chain from new expression"
 `;
 
 exports[`snippet: #3 [acorn] format 1`] = `
 "Optional chaining cannot appear in the callee of new expressions (1:26)
 > 1 | const willThrow = new obj?.foo.bar.qux(); // Error: not a constructor
-    |                          ^"
+    |                          ^
+Cause: Optional chaining cannot appear in the callee of new expressions (1:25)"
 `;
 
 exports[`snippet: #3 [babel] format 1`] = `
 "Constructors in/after an Optional Chain are not allowed. (1:26)
 > 1 | const willThrow = new obj?.foo.bar.qux(); // Error: not a constructor
-    |                          ^"
+    |                          ^
+Cause: Constructors in/after an Optional Chain are not allowed. (1:25)"
 `;
 
 exports[`snippet: #3 [espree] format 1`] = `
 "Optional chaining cannot appear in the callee of new expressions (1:26)
 > 1 | const willThrow = new obj?.foo.bar.qux(); // Error: not a constructor
-    |                          ^"
+    |                          ^
+Cause: Optional chaining cannot appear in the callee of new expressions"
 `;
 
 exports[`snippet: #3 [meriyah] format 1`] = `
 "Invalid optional chain from new expression (1:27)
 > 1 | const willThrow = new obj?.foo.bar.qux(); // Error: not a constructor
-    |                           ^"
+    |                           ^
+Cause: [1:27]: Invalid optional chain from new expression"
 `;
 
 exports[`snippet: #4 [acorn] format 1`] = `
@@ -101,7 +117,8 @@ exports[`snippet: #4 [acorn] format 1`] = `
   2 | class Test {
   3 | }
 > 4 | new Test?.(); // test instance
-    |         ^"
+    |         ^
+Cause: Optional chaining cannot appear in the callee of new expressions (4:8)"
 `;
 
 exports[`snippet: #4 [babel] format 1`] = `
@@ -109,7 +126,8 @@ exports[`snippet: #4 [babel] format 1`] = `
   2 | class Test {
   3 | }
 > 4 | new Test?.(); // test instance
-    |         ^"
+    |         ^
+Cause: Constructors in/after an Optional Chain are not allowed. (4:8)"
 `;
 
 exports[`snippet: #4 [espree] format 1`] = `
@@ -117,7 +135,8 @@ exports[`snippet: #4 [espree] format 1`] = `
   2 | class Test {
   3 | }
 > 4 | new Test?.(); // test instance
-    |         ^"
+    |         ^
+Cause: Optional chaining cannot appear in the callee of new expressions"
 `;
 
 exports[`snippet: #4 [meriyah] format 1`] = `
@@ -125,29 +144,34 @@ exports[`snippet: #4 [meriyah] format 1`] = `
   2 | class Test {
   3 | }
 > 4 | new Test?.(); // test instance
-    |          ^"
+    |          ^
+Cause: [4:10]: Invalid optional chain from new expression"
 `;
 
 exports[`snippet: #5 [acorn] format 1`] = `
 "Optional chaining cannot appear in the callee of new expressions (1:11)
 > 1 | new exists?.(); // undefined
-    |           ^"
+    |           ^
+Cause: Optional chaining cannot appear in the callee of new expressions (1:10)"
 `;
 
 exports[`snippet: #5 [babel] format 1`] = `
 "Constructors in/after an Optional Chain are not allowed. (1:11)
 > 1 | new exists?.(); // undefined
-    |           ^"
+    |           ^
+Cause: Constructors in/after an Optional Chain are not allowed. (1:10)"
 `;
 
 exports[`snippet: #5 [espree] format 1`] = `
 "Optional chaining cannot appear in the callee of new expressions (1:11)
 > 1 | new exists?.(); // undefined
-    |           ^"
+    |           ^
+Cause: Optional chaining cannot appear in the callee of new expressions"
 `;
 
 exports[`snippet: #5 [meriyah] format 1`] = `
 "Invalid optional chain from new expression (1:12)
 > 1 | new exists?.(); // undefined
-    |            ^"
+    |            ^
+Cause: [1:12]: Invalid optional chain from new expression"
 `;

tests/format/misc/errors/js/record/__snapshots__/jsfmt.spec.js.snap

@@ -3,119 +3,139 @@
 exports[`snippet: #0 [acorn] format 1`] = `
 "Unexpected character '{' (1:2)
 > 1 | #{a() {}}
-    |  ^"
+    |  ^
+Cause: Unexpected character '{' (1:1)"
 `;
 
 exports[`snippet: #0 [babel] format 1`] = `
 "Only properties and spread elements are allowed in record definitions. (1:3)
 > 1 | #{a() {}}
-    |   ^"
+    |   ^
+Cause: Only properties and spread elements are allowed in record definitions. (1:2)"
 `;
 
 exports[`snippet: #0 [espree] format 1`] = `
 "Unexpected character '{' (1:2)
 > 1 | #{a() {}}
-    |  ^"
+    |  ^
+Cause: Unexpected character '{'"
 `;
 
 exports[`snippet: #0 [meriyah] format 1`] = `
 "'#' not followed by identifier (1:1)
 > 1 | #{a() {}}
-    | ^"
+    | ^
+Cause: [1:1]: '#' not followed by identifier"
 `;
 
 exports[`snippet: #1 [acorn] format 1`] = `
 "Unexpected character '{' (1:2)
 > 1 | #{async b() {}}
-    |  ^"
+    |  ^
+Cause: Unexpected character '{' (1:1)"
 `;
 
 exports[`snippet: #1 [babel] format 1`] = `
 "Only properties and spread elements are allowed in record definitions. (1:3)
 > 1 | #{async b() {}}
-    |   ^"
+    |   ^
+Cause: Only properties and spread elements are allowed in record definitions. (1:2)"
 `;
 
 exports[`snippet: #1 [espree] format 1`] = `
 "Unexpected character '{' (1:2)
 > 1 | #{async b() {}}
-    |  ^"
+    |  ^
+Cause: Unexpected character '{'"
 `;
 
 exports[`snippet: #1 [meriyah] format 1`] = `
 "'#' not followed by identifier (1:1)
 > 1 | #{async b() {}}
-    | ^"
+    | ^
+Cause: [1:1]: '#' not followed by identifier"
 `;
 
 exports[`snippet: #2 [acorn] format 1`] = `
 "Unexpected character '{' (1:2)
 > 1 | #{get c() {}}
-    |  ^"
+    |  ^
+Cause: Unexpected character '{' (1:1)"
 `;
 
 exports[`snippet: #2 [babel] format 1`] = `
 "Only properties and spread elements are allowed in record definitions. (1:3)
 > 1 | #{get c() {}}
-    |   ^"
+    |   ^
+Cause: Only properties and spread elements are allowed in record definitions. (1:2)"
 `;
 
 exports[`snippet: #2 [espree] format 1`] = `
 "Unexpected character '{' (1:2)
 > 1 | #{get c() {}}
-    |  ^"
+    |  ^
+Cause: Unexpected character '{'"
 `;
 
 exports[`snippet: #2 [meriyah] format 1`] = `
 "'#' not followed by identifier (1:1)
 > 1 | #{get c() {}}
-    | ^"
+    | ^
+Cause: [1:1]: '#' not followed by identifier"
 `;
 
 exports[`snippet: #3 [acorn] format 1`] = `
 "Unexpected character '{' (1:2)
 > 1 | #{set d(_) {}}
-    |  ^"
+    |  ^
+Cause: Unexpected character '{' (1:1)"
 `;
 
 exports[`snippet: #3 [babel] format 1`] = `
 "Only properties and spread elements are allowed in record definitions. (1:3)
 > 1 | #{set d(_) {}}
-    |   ^"
+    |   ^
+Cause: Only properties and spread elements are allowed in record definitions. (1:2)"
 `;
 
 exports[`snippet: #3 [espree] format 1`] = `
 "Unexpected character '{' (1:2)
 > 1 | #{set d(_) {}}
-    |  ^"
+    |  ^
+Cause: Unexpected character '{'"
 `;
 
 exports[`snippet: #3 [meriyah] format 1`] = `
 "'#' not followed by identifier (1:1)
 > 1 | #{set d(_) {}}
-    | ^"
+    | ^
+Cause: [1:1]: '#' not followed by identifier"
 `;
 
 exports[`snippet: #4 [acorn] format 1`] = `
 "Unexpected character '{' (1:2)
 > 1 | #{*e() {}}
-    |  ^"
+    |  ^
+Cause: Unexpected character '{' (1:1)"
 `;
 
 exports[`snippet: #4 [babel] format 1`] = `
 "Only properties and spread elements are allowed in record definitions. (1:3)
 > 1 | #{*e() {}}
-    |   ^"
+    |   ^
+Cause: Only properties and spread elements are allowed in record definitions. (1:2)"
 `;
 
 exports[`snippet: #4 [espree] format 1`] = `
 "Unexpected character '{' (1:2)
 > 1 | #{*e() {}}
-    |  ^"
+    |  ^
+Cause: Unexpected character '{'"
 `;
 
 exports[`snippet: #4 [meriyah] format 1`] = `
 "'#' not followed by identifier (1:1)
 > 1 | #{*e() {}}
-    | ^"
+    | ^
+Cause: [1:1]: '#' not followed by identifier"
 `;

tests/format/misc/errors/js/regex-v-u-flags/__snapshots__/jsfmt.spec.js.snap

@@ -4,54 +4,62 @@ exports[`invalid-flags.js [acorn] format 1`] = `
 "Invalid regular expression flag (1:2)
 > 1 | /a/ugv;
     |  ^
-  2 |"
+  2 |
+Cause: Invalid regular expression flag (1:1)"
 `;
 
 exports[`invalid-flags.js [babel] format 1`] = `
 "The 'u' and 'v' regular expression flags cannot be enabled at the same time. (1:7)
 > 1 | /a/ugv;
     |       ^
-  2 |"
+  2 |
+Cause: The 'u' and 'v' regular expression flags cannot be enabled at the same time. (1:6)"
 `;
 
 exports[`invalid-flags.js [espree] format 1`] = `
 "Invalid regular expression flag (1:2)
 > 1 | /a/ugv;
     |  ^
-  2 |"
+  2 |
+Cause: Invalid regular expression flag"
 `;
 
 exports[`invalid-flags.js [meriyah] format 1`] = `
 "Unexpected regular expression flag (1:5)
 > 1 | /a/ugv;
     |     ^
-  2 |"
+  2 |
+Cause: [1:5]: Unexpected regular expression flag"
 `;
 
 exports[`invalid-flags2.js [acorn] format 1`] = `
 "Invalid regular expression flag (1:2)
 > 1 | /a/vu;
     |  ^
-  2 |"
+  2 |
+Cause: Invalid regular expression flag (1:1)"
 `;
 
 exports[`invalid-flags2.js [babel] format 1`] = `
 "The 'u' and 'v' regular expression flags cannot be enabled at the same time. (1:6)
 > 1 | /a/vu;
     |      ^
-  2 |"
+  2 |
+Cause: The 'u' and 'v' regular expression flags cannot be enabled at the same time. (1:5)"
 `;
 
 exports[`invalid-flags2.js [espree] format 1`] = `
 "Invalid regular expression flag (1:2)
 > 1 | /a/vu;
     |  ^
-  2 |"
+  2 |
+Cause: Invalid regular expression flag"
 `;
 
 exports[`invalid-flags2.js [meriyah] format 1`] = `
 "Unexpected regular expression flag (1:3)
 > 1 | /a/vu;
     |   ^
-  2 |"
+  2 |
+Cause: [1:3]: Unexpected regular expression flag"
 `;

tests/format/misc/errors/js/reserved-word/__snapshots__/jsfmt.spec.js.snap

@@ -3,23 +3,27 @@
 exports[`snippet: #0 [espree] format 1`] = `
 "The keyword 'interface' is reserved (1:7)
 > 1 | class interface {}
-    |       ^"
+    |       ^
+Cause: The keyword 'interface' is reserved"
 `;
 
 exports[`snippet: #0 [meriyah] format 1`] = `
 "Unexpected strict mode reserved word (1:15)
 > 1 | class interface {}
-    |               ^"
+    |               ^
+Cause: [1:15]: Unexpected strict mode reserved word"
 `;
 
 exports[`snippet: #1 [espree] format 1`] = `
 "The keyword 'interface' is reserved (1:8)
 > 1 | import interface from "foo";
-    |        ^"
+    |        ^
+Cause: The keyword 'interface' is reserved"
 `;
 
 exports[`snippet: #1 [meriyah] format 1`] = `
 "Unexpected strict mode reserved word (1:16)
 > 1 | import interface from "foo";
-    |                ^"
+    |                ^
+Cause: [1:16]: Unexpected strict mode reserved word"
 `;