GeezerVison is showing github.com — [3.15] gh-159739: Allocate thread-local state before constructing the object (GH-160166) by miss-islington · Pull Request #160286 · python/cpython
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miss-islington
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Oct 22, 2026
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If allocating a thread-local object’s internal dictionary or watchdog set fails, a subclass finalizer can run with that state missing. Accessing a thread-local attribute then dereferences the missing state and crashes; allocate both containers before creating the object. Backport to 3.15 and 3.14.
(cherry picked from commit 4a61673)
Co-authored-by: Jelle Zijlstra [email protected]
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…object (pythonGH-160166)
If allocating a thread-local object’s internal dictionary or watchdog set fails, a subclass finalizer can run with that state missing. Accessing a thread-local attribute then dereferences the missing state and crashes; allocate both containers before creating the object. Backport to 3.15 and 3.14.
(cherry picked from commit 4a61673)
Co-authored-by: Jelle Zijlstra <[email protected]>
This was referenced Oct 22, 2026
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