Fix duplicated comments (#8742)

* Add failed test

* Fix issue

* more tests

* Restore verify parser

* Add changelog

* Update snapshots

changelog_unreleased/javascript/pr-8742.md

@@ -0,0 +1,16 @@
+#### Fix duplicated `prettier-ignore` comments ([#8742](https://github.com/prettier/prettier/pull/8742) by [@fisker](https://github.com/fisker))
+
+<!-- prettier-ignore -->
+```js
+// Input
+a = <div {.../* prettier-ignore */{}}/>
+a = <div {...{}/* prettier-ignore */}/>
+
+// Prettier stable
+a = <div {/* prettier-ignore */ .../* prettier-ignore */ {}} />;
+a = <div {...{} /* prettier-ignore */ /* prettier-ignore */} />;
+
+// Prettier master
+a = <div {.../* prettier-ignore */ {}} />;
+a = <div {...{} /* prettier-ignore */} />;
+```

src/language-js/printer-estree.js

@@ -1919,7 +1919,7 @@ function printPathNoParens(path, options, print, args) {
           (p) => {
             const printed = concat(["...", print(p)]);
             const n = p.getValue();
-            if (!n.comments || !n.comments.length) {
+            if (!n.comments || !n.comments.length || !willPrintOwnComments(p)) {
               return printed;
             }
             return concat([

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

@@ -148,3 +148,53 @@ const response = {
 
 ================================================================================
 `;
+
+exports[`ignore-2.js format 1`] = `
+====================================options=====================================
+parsers: ["babel", "flow"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+// #8736
+
+function HelloWorld() {
+  return (
+    <div
+      {...{} /*
+      // @ts-ignore */ /* prettier-ignore */}
+      invalidProp="HelloWorld"
+    >
+      test
+    </div>
+  );
+}
+
+a = <div {.../* prettier-ignore */b}/>
+a = <div {...b/* prettier-ignore */}/>
+a = <div {.../* prettier-ignore */{}}/>
+a = <div {...{/* prettier-ignore */}}/>
+a = <div {...{}/* prettier-ignore */}/>
+
+=====================================output=====================================
+// #8736
+
+function HelloWorld() {
+  return (
+    <div
+      {...{} /*
+      // @ts-ignore */ /* prettier-ignore */}
+      invalidProp="HelloWorld"
+    >
+      test
+    </div>
+  );
+}
+
+a = <div {.../* prettier-ignore */ b} />;
+a = <div {...b /* prettier-ignore */} />;
+a = <div {.../* prettier-ignore */ {}} />;
+a = <div {...{/* prettier-ignore */}} />;
+a = <div {...{} /* prettier-ignore */} />;
+
+================================================================================
+`;

tests/js/ignore/ignore-2.js

@@ -0,0 +1,19 @@
+// #8736
+
+function HelloWorld() {
+  return (
+    <div
+      {...{} /*
+      // @ts-ignore */ /* prettier-ignore */}
+      invalidProp="HelloWorld"
+    >
+      test
+    </div>
+  );
+}
+
+a = <div {.../* prettier-ignore */b}/>
+a = <div {...b/* prettier-ignore */}/>
+a = <div {.../* prettier-ignore */{}}/>
+a = <div {...{/* prettier-ignore */}}/>
+a = <div {...{}/* prettier-ignore */}/>