Skip to content

dict insert_split_key() change introduces data-race #152238

Closed
Closed
dict insert_split_key() change introduces data-race#152238
Labels
interpreter-core(Objects, Python, Grammar, and Parser dirs)topic-free-threadingtype-bugAn unexpected behavior, bug, or error

Description

@nascheme
nascheme
opened on Jun 25, 2026

Bug report

Bug description:

GH-152200 fixes a deadlock but it introduces a data-race, resulting in a correctness bug. Demo of bug is linked to other issue. Suggested fix is to revert the original optimization (GH-150490) and also the fix applied to it.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

Activity

  1. nascheme
    added
    type-bugAn unexpected behavior, bug, or error
    topic-free-threading
    on Jun 25, 2026
  2. StanFromIreland
    added
    interpreter-core(Objects, Python, Grammar, and Parser dirs)
    on Jun 26, 2026
  3. nascheme
    added a commit that references this issue on Jun 26, 2026

    gh-152238: Revert gh-150490 and gh-152200. (gh-152232)

    9626ef8
  4. nascheme
    closed this as completedon Jun 26, 2026

  5. vstinner commented on Jun 26, 2026

    @vstinner
    vstinner
    on Jun 26, 2026
    Member

    Thanks for fixing the issue (for the revert)!

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Labels

    interpreter-core(Objects, Python, Grammar, and Parser dirs)topic-free-threadingtype-bugAn unexpected behavior, bug, or error

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions