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Freeze modules used during startup #145278

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Freeze modules used during startup#145278
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buildThe build process and cross-buildinterpreter-core(Objects, Python, Grammar, and Parser dirs)type-featureA feature request or enhancement

Description

@FFY00
FFY00
opened on Feb 26, 2026

Feature or enhancement

Proposal:

This should be encodings, which was't frozen due to the lack of support for partially frozen packages, and linecache, which is used when running in interactive mode.

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

Activity

  1. FFY00
    added
    type-featureA feature request or enhancement
    on Feb 26, 2026
  2. StanFromIreland
    added
    interpreter-core(Objects, Python, Grammar, and Parser dirs)
    buildThe build process and cross-build
    on Feb 26, 2026
  3. FFY00
    added a commit that references this issue on Feb 26, 2026

    pythonGH-145278: freeze encodings (partially) and linecache

    90d0e54
  4. FFY00
    added a commit that references this issue on Mar 9, 2026

    GH-145278: freeze encodings (partially) and linecache (#145279)

    3a0c716
  5. sergey-miryanov
    added a commit that references this issue on Mar 9, 2026

    Revert "pythonGH-145278: freeze encodings (partially) and linecache (p…

    d05c9ef
  6. encukou
    added a commit that references this issue on Mar 9, 2026

    Revert "pythonGH-145278: freeze encodings (partially) and linecache (p…

    3958e34
  7. sergey-miryanov
    added a commit that references this issue on Mar 9, 2026

    Reapply "pythonGH-145278: freeze encodings (partially) and linecache (p…

    9fd4cff
  8. hugovk
    added a commit that references this issue on Mar 9, 2026

    gh-145278: Revert "freeze encodings (partially) and linecache (#145279)…

    07a39ca
  9. FFY00
    added 3 commits that reference this issue on Apr 10, 2026

    pythonGH-145278: freeze encodings (partially) and linecache (python#1…

    2a81aa3

    pythonGH-145278: freeze encodings (partially) and linecache

    719d17d

    GH-145278: freeze encodings (partially) and linecache (#148347)

    0012686

  10. encukou commented on Apr 15, 2026

    @encukou
    encukou
    on Apr 15, 2026
    Member

    @FFY00, the Raspbian buildbot fails consistently after this merge.
    I can send revert PR to check if this is what breaks things. Do you have a better course of action?

  11. FFY00 commented on Apr 16, 2026

    @FFY00
    FFY00
    on Apr 16, 2026
    MemberAuthor

    Since the failure is only on the test that checks the used syscalls, I'd prefer to just adjust that test. I think it should be a fairly safe change, and we can adjust the approach afterwards when we have feedback from the experts on that area. I'll work on a PR for that.

  12. FFY00
    added a commit that references this issue on Apr 16, 2026

    pythonGH-145278: also filter mmap2 in strace_helper.filter_memory

    1880772

  13. FFY00 commented on Apr 16, 2026

    @FFY00
    FFY00
    on Apr 16, 2026
    MemberAuthor

    I think the issue was simply that test.support.strace_helper.filter_memory wasn't prepared for mmap2, which is used in a code path triggered by this change. I have opened GH-148648.

  14. encukou
    added a commit that references this issue on Apr 20, 2026

    GH-145278: also filter mmap2 in strace_helper.filter_memory (GH-148648)

    513db72
  15. ljfp
    added 4 commits that reference this issue on Apr 25, 2026

    pythonGH-145278: freeze encodings (partially) and linecache (python#1…

    2840631

    pythongh-145278: Revert "freeze encodings (partially) and linecache (p…

    33e9809

    pythonGH-145278: freeze encodings (partially) and linecache (python#1…

    78c0693

    pythonGH-145278: also filter mmap2 in strace_helper.filter_memory (py…

    3a9ed7e

  16. FFY00 commented on Apr 29, 2026

    @FFY00
    FFY00
    on Apr 29, 2026
    MemberAuthor

    This is now merge, and the CI is happy, so we can close.

  17. FFY00
    closed this as completedon Apr 29, 2026
  18. zooba
    added a commit that references this issue on Aug 24, 2026

    gh-148750: Unfreeze encodings module to avoid import errors with zipp…

    ee521e8
  19. clin1234
    added a commit that references this issue on Aug 27, 2026

    pythongh-148750: Unfreeze encodings module to avoid import errors wit…

    7a3c76b
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