Skip to content

Warning about remaining subinterpreters should suggest using of concurrent.interpreters.Interpeter #141509

Closed
Closed
Warning about remaining subinterpreters should suggest using of concurrent.interpreters.Interpeter#141509
Labels
interpreter-core(Objects, Python, Grammar, and Parser dirs)topic-subinterpreterstype-bugAn unexpected behavior, bug, or error

Description

@sergey-miryanov
sergey-miryanov
opened on Nov 13, 2025

Bug report

Bug description:

finalize_subinterpreters checks if remaining subinterpreters are present and if so suggest to destroy them via destroy method of internal _interpreters module. I propose to change the warning message to use Interpeter.close as it less confusing.

cpython/Python/pylifecycle.c

Lines 2642 to 2648 in 2fbd396

/* Warn the user if they forgot to clean up subinterpreters. */
(void)PyErr_WarnEx(
PyExc_RuntimeWarning,
"remaining subinterpreters; "
"destroy them with _interpreters.destroy()",
0);

@ZeroIntensity @ericsnowcurrently What do you think?

If yes, I'm ready to fix this.

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

Linked PRs

Activity

  1. sergey-miryanov
    added
    type-bugAn unexpected behavior, bug, or error
    interpreter-core(Objects, Python, Grammar, and Parser dirs)
    topic-subinterpreters
    on Nov 13, 2025
  2. github-project-automation
    added this to Subinterpreterson Nov 13, 2025
  3. github-project-automation
    moved this to Todo in Subinterpreterson Nov 13, 2025

  4. ZeroIntensity commented on Nov 13, 2025

    @ZeroIntensity
    ZeroIntensity
    on Nov 13, 2025
    Member

    I think it'd be fine to change it, yeah. Eric added that warning long before concurrent.interpreters was a thing.

  5. ZeroIntensity
    added a commit that references this issue on Nov 14, 2025

    GH-141509: Fix warning about remaining subinterpreters (GH-141528)

    fa245df
  6. sergey-miryanov
    added a commit that references this issue on Nov 14, 2025

    [3.14] pythonGH-141509: Fix warning about remaining subinterpreters (p…

    2ed943e
  7. ZeroIntensity
    added a commit that references this issue on Nov 15, 2025

    [3.14] GH-141509: Fix warning about remaining subinterpreters (GH-141528

    21e43d5

  8. sergey-miryanov commented on Nov 15, 2025

    @sergey-miryanov
    sergey-miryanov
    on Nov 15, 2025
    ContributorAuthor

    PR merged and backported. Closing this now.
    Thanks!

  9. sergey-miryanov
    closed this as completedon Nov 15, 2025
  10. github-project-automation
    moved this from Todo to Done in Subinterpreterson Nov 15, 2025
  11. StanFromIreland
    added a commit that references this issue on Dec 6, 2025

    pythonGH-141509: Fix warning about remaining subinterpreters (pythonG…

    32190e8
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-subinterpreterstype-bugAn unexpected behavior, bug, or error

    Projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions