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Fix invalid block-scoped loop #6046

Merged
merged 2 commits into from
Aug 3, 2017
Merged

Fix invalid block-scoped loop #6046

merged 2 commits into from
Aug 3, 2017

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jridgewell
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Q A
Patch: Bug Fix? Yes
Major: Breaking Change? No
Minor: New Feature? No
Deprecations? No
Spec Compliancy? Yes?
Tests Added/Pass? Yes
Fixed Tickets Closes #6038
License MIT
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Dependency Changes

The issue is we're reusing the same identifier in two scopes (in as the hoisted loop's function params, and as that function's call expression arguments). Well, when we remap in the context of the loop call, we changed the param's name, too.

@jridgewell jridgewell added the PR: Bug Fix 🐛 A type of pull request used for our changelog categories label Aug 2, 2017
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@jridgewell, thanks for your PR! By analyzing the history of the files in this pull request, we identified @hzoo, @existentialism and @loganfsmyth to be potential reviewers.

const args = values(outsideRefs);
const params = args.map(id => t.clone(id));
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@hzoo hzoo Aug 3, 2017

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Wondering, are there other places we would need to make this change (where we don't clone)? and how we can prevent this issue in the future (other than the whole immutable ast)

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hzoo commented Aug 3, 2017

Awesome fix!

@hzoo hzoo merged commit 6630ae9 into babel:7.0 Aug 3, 2017
@lock lock bot added the outdated A closed issue/PR that is archived due to age. Recommended to make a new issue label Oct 6, 2019
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3 participants