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GeezerVison is showing github.com — gh-158194: Exercise type freezing in concurrent setattr deadlock test by nascheme · Pull Request #161655 · python/cpython

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@nascheme

@nascheme nascheme commented Nov 9, 2026 •
edited by bedevere-app Bot
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Add test to confirm this is fixed now.

  • Issue: Free-threading: PyType_Freeze() can deadlock with concurrent class updates #158194

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@nascheme
pythongh-158194: Exercise type freezing in concurrent setattr deadloc…
f86bbd9 
…k test
@nascheme nascheme added skip news topic-free-threading labels Nov 9, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Nov 9, 2026
Free-threading: PyType_Freeze() can deadlock with concurrent class updates #158194
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@bedevere-app bedevere-app Bot added the tests Tests in the Lib/test dir label Nov 9, 2026
@nascheme nascheme mentioned this pull request Nov 9, 2026
gh-158194: Pin the type lock in PyType_Freeze() #158674
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@nascheme
Fix comment, we don't pin type lock anymore.
78fad92
@nascheme
nascheme marked this pull request as ready for review November 10, 2026 01:44
@bedevere-app bedevere-app Bot added the awaiting core review label Nov 10, 2026
kumaraditya303
kumaraditya303 approved these changes Nov 10, 2026
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@bedevere-app bedevere-app Bot added awaiting merge and removed awaiting core review labels Nov 10, 2026
@kumaraditya303
kumaraditya303 merged commit 4575fb9 into python:main Nov 10, 2026
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@bedevere-app bedevere-app Bot removed the awaiting merge label Nov 10, 2026
orsenthil pushed a commit to orsenthil/cpython that referenced this pull request Nov 12, 2026
@nascheme @orsenthil
pythongh-158194: Exercise type freezing in concurrent setattr deadloc…
769222a 
…k test (python#161655)
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@kumaraditya303 kumaraditya303 kumaraditya303 approved these changes

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skip news tests Tests in the Lib/test dir topic-free-threading

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@nascheme @kumaraditya303
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