From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Date: Thu, 12 Feb 2026 23:21:26 +0000 (+0100) Subject: [3.13] gh-144706: Warn against using synchronization primitives within signal handler... X-Git-Tag: v3.13.13~192 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=99a4e55f79be815949d64e883847f3bafa93125b;p=thirdparty%2FPython%2Fcpython.git [3.13] gh-144706: Warn against using synchronization primitives within signal handlers (GH-144736) (GH-144768) gh-144706: Warn against using synchronization primitives within signal handlers (GH-144736) (cherry picked from commit 945bf8ce1bf7ee3881752c2ecc129e35ab818477) Co-authored-by: Robsdedude --- diff --git a/Doc/library/signal.rst b/Doc/library/signal.rst index 1a2a555f5c0f..e37ca21d2595 100644 --- a/Doc/library/signal.rst +++ b/Doc/library/signal.rst @@ -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 ---------------