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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
@A0su

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@A0su
A0su
opened on Mar 24, 2026
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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

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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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