Fix bug with holes in array literals #7911

bakkot · 2020-03-31T05:54:27Z

Fixes #7910, so that running Prettier against

new Test()
  .test()
  .test([, 0])
  .test();

no longer throws an error.

I’ve added tests to confirm my change works.
(If changing the API or CLI) I’ve documented the changes I’ve made (in the docs/ directory)
(If the change is user-facing) I’ve added my changes to changelog_unreleased/*/pr-XXXX.md file following changelog_unreleased/TEMPLATE.md.
I’ve read the contributing guidelines.

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fisker · 2020-03-31T10:20:20Z

src/language-js/utils.js

@@ -958,7 +958,7 @@ function isSimpleCallArgument(node, depth) {
    );
  }
  if (node.type === "ArrayExpression") {
-    return node.elements.every(isChildSimple);
+    return node.elements.every((x) => x == null || isChildSimple(x));


Shouldn't this be === null ? holes always null

bakkot added 3 commits March 30, 2020 22:53

Fix bug with holes in array literals

b98f792

add changelog

995ce8a

rebuild snapshots

14d37b6

sosukesuzuki approved these changes Mar 31, 2020

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thorn0 merged commit 18bf01e into master Mar 31, 2020

fisker reviewed Mar 31, 2020

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alexander-akait deleted the holes-in-calls branch March 31, 2020 10:49

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Fix bug with holes in array literals #7911

Fix bug with holes in array literals #7911

bakkot commented Mar 31, 2020 •

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fisker Mar 31, 2020

Fix bug with holes in array literals #7911

Fix bug with holes in array literals #7911

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bakkot commented Mar 31, 2020 •

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