Microsoft/TypeScript
Voir sur GitHub`using` transform throws when a for body binding shadows the for head binding
Open
#61 714 ouverte le 16 mai 2025
BugDomain: API: TransformsFix AvailableHelp Wanted
Métriques du dépôt
- Stars
- (48 455 stars)
- Métriques de merge PR
- (Merge moyen 6j 17h) (9 PRs mergées en 30 j)
Description
🔎 Search Terms
explicit resource management, using, await using, loop initializer, Symbol.dispose, Symbol.asyncDispose, iteration, shadows
🕗 Version & Regression Information
- This changed between versions ______ and _______
- This changed in commit or PR _______
- This is the behavior in every version I tried, and I reviewed the FAQ for entries about https://github.com/microsoft/TypeScript/wiki/FAQ#common-bugs-that-arent-bugs
- I was unable to test this on prior versions because _______
⏯ Playground Link
💻 Code
class Foo {}
for (using foo of []) {
const foo = new Foo();
}
🙁 Actual behavior
The transformed output throws "redeclaration of const foo "
🙂 Expected behavior
The transformed output should not throw.
Additional information about the issue
Babel is also affected by this issue: https://github.com/babel/babel/issues/17318. We plan to wrap the for body within a new block when it contains shadowed binding.