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[3.13] gh-143706: Fix sys.argv not set during multiprocessing forkserver`main` preload (GH-143717)#143821

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Merged

gpshead merged 1 commit intopython:3.13fromgpshead:backport-143706-3.13

Jan 14, 2026

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[3.13] gh-143706: Fix sys.argv not set during multiprocessing forkserver`main` preload (GH-143717)#143821

gpshead merged 1 commit intopython:3.13fromgpshead:backport-143706-3.13

Jan 14, 2026

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gpshead commentedJan 14, 2026•
edited by bedevere-appbot
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The forkserver was not passing sys.argv to its main() function, causing sys.argv to be empty during__main__ module import in child processes. This fixes a non-obvious regression inadvertently introduced by thegh-126631 main preloading fix.

(cherry picked from commit298d544)

Issue:sys.argv no longer correct during main module execution usingforkserver #143706

[3.13]pythongh-143706: Fix sys.argv not set during multiprocessing f…

e95d1c9

…orkserver `__main__` preload (pythonGH-143717)The forkserver was not passing sys.argv to its main() function, causingsys.argv to be empty during `__main__` module import in child processes. Thisfixes a non-obvious regression inadvertently introduced by thepythongh-126631 mainpreloading fix.(cherry picked from commit298d544)

This was referencedJan 14, 2026

sys.argv no longer correct during main module execution usingforkserver#143706

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gh-143706: Fix sys.argv not set during multiprocessing forkserver__main__ preload#143717

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gpshead marked this pull request as ready for review

January 14, 2026 01:39