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Incorrect downlevel compilation for block scoped bindings captured in class initializers #7714

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Incorrect downlevel compilation for block scoped bindings captured in class initializers#7714
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BugA bug in TypeScript
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@vladima
Vladimir Matveev (vladima)
opened on Mar 28, 2016
let ar = [];
for (let i = 0; i < 2; i++) {
  ar.push(class { x = i; });
}
console.log(new ar[0]().x); // should this be 0, now prints 2
console.log(new ar[1]().x); // should this be 1, now prints 2

Activity

  1. Vladimir Matveev (vladima)
    self-assigned this
    on Mar 28, 2016
  2. Vladimir Matveev (vladima)
    added
    BugA bug in TypeScript
    on Mar 28, 2016
  3. Mohamed Hegazy (mhegazy)
    modified the milestones: TypeScript 2.1, TypeScript 2.0 on Jun 7, 2016
  4. Mohamed Hegazy (mhegazy)
    modified the milestones: TypeScript 2.0, TypeScript 2.1 on Jun 15, 2016
  5. Mohamed Hegazy (mhegazy)
    modified the milestones: TypeScript 2.1, on Sep 29, 2016
  6. Mohamed Hegazy (mhegazy)
    assigned
    Mohamed Hegazy (mhegazy)
    and unassigned
    Vladimir Matveev (vladima)
    on Mar 24, 2017
  7. Ryan Cavanaugh (RyanCavanaugh)
    unassigned
    Mohamed Hegazy (mhegazy)
    on Jul 17, 2019

  8. jakebailey commented on Jul 7, 2023

    @jakebailey
    Jake Bailey (jakebailey)
    on Jul 7, 2023
    Member

    Just looking at old issues; this one is the same as #8578 and was also fixed by #43197.

  9. Jake Bailey (jakebailey)
    closed this as completedon Jul 7, 2023
  10. microsoft
    locked as resolved and limited conversation to collaborators on Oct 22, 2025
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