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[3.14] gh-159739: Allocate thread-local state before constructing the object (GH-160166) - #160285
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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 <jelle@openai.com>
This was referenced 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 jelle@openai.com