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[3.14] gh-144706: Warn against using synchronization primitives within signal handlers (GH-144736) (GH-144767)

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gh-144706: Warn against using synchronization primitives within signal handlers (GH-144736)
(cherry picked from commit 945bf8ce1b)

Co-authored-by: Robsdedude <dev@rouvenbauer.de>
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Miss Islington (bot) 2026-02-13 00:21:17 +01:00 • committed by GitHub
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Doc/library/signal.rst
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@ -68,6 +68,11 @@ the synchronization primitives from the :mod:`threading` module instead.
Besides, only the main thread of the main interpreter is allowed to set a new signal handler.
.. warning::
Synchronization primitives such as :class:`threading.Lock` should not be used
within signal handlers. Doing so can lead to unexpected deadlocks.
Module contents
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