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GeezerVison is showing github.com — `modsupport.c`: Missing `va_end` in `_abiinfo_raise` · Issue #146386 · python/cpython

modsupport.c: Missing va_end in _abiinfo_raise #146386

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modsupport.c: Missing va_end in _abiinfo_raise#146386
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interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Description

@A0su
A0su
opened on Mar 24, 2026
Issue body actions

Bug report

Bug description:

Bug Report

modsupport.c: Missing va_end in _abiinfo_raise

va_start(vargs, format) at line 689 but va_end(vargs) never called on any path. UB per C99 7.15.1.

This is a sub-issue of #146102 with original gist details

CPython versions tested on:

CPython main branch

Operating systems tested on:

Windows

Linked PRs

  • gh-146386:modsupport.c Missing va_end in _abiinfo_raise #146387

Activity

  1. A0su
    added
    type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error
    on Mar 24, 2026
  2. picnixz
    added
    interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)
    3.15bugs and security fixesbugs and security fixes
    and removed
    3.15bugs and security fixesbugs and security fixes
    on Mar 24, 2026
  3. devdanzin
    added a parent issue on Mar 24, 2026
    • Umbrella issue: bugs found using cpython-review-toolkit #146102
  4. kumaraditya303
    added a commit that references this issue on Mar 25, 2026

    gh-146386: fix missing `va_end` in `_abiinfo_raise` in `modsupport.c` (…

    04bd543
  5. kumaraditya303
    closed this as completedon Mar 25, 2026
  6. clin1234
    added a commit that references this issue on Apr 16, 2026

    pythongh-146386: fix missing `va_end` in `_abiinfo_raise` in `modsupp…

    3dcffa3
  7. ljfp
    added a commit that references this issue on Apr 25, 2026

    pythongh-146386: fix missing `va_end` in `_abiinfo_raise` in `modsupp…

    800514c
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    interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

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