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`modsupport.c`: Missing `va_end` in `_abiinfo_raise`

A0su

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