[3.9] bpo-45274: Fix Thread._wait_for_tstate_lock() race condition (GH-28532) #28579
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Fix a race condition in the Thread.join() method of the threading
module. If the function is interrupted by a signal and the signal
handler raises an exception, make sure that the thread remains in a
consistent state to prevent a deadlock.
(cherry picked from commit a22be49)
Co-authored-by: Victor Stinner [email protected]
https://bugs.python.org/issue45274