PyMutex failure in parking_lot.c on Windows during interpreter shutdown #135099
Description
Bug report
Bug description:
Fatal Python error: _PySemaphore_PlatformWait: unexpected error from semaphore: 4294967295 (error: 6)
Python runtime state: finalizing (tstate=0x6aa6c460)
Thread 0x00001360 (most recent call first):
<no Python frame>
Windows fatal exception: code 0x80000003
Current thread 0x00001360 (most recent call first):
<no Python frame>
Current thread's C stack trace (most recent call first):
<cannot get C stack on this system>
4294967295 is the -1 return code from WaitForMultipleObjects. Error code 6 is ERROR_INVALID_HANDLE.
I'm pretty sure that the _PyOS_SigintEvent() handle is getting closed concurrently with the mutex wait.
Lines 118 to 136 in 1ffe913
Seen in https://github.com/python/cpython/actions/runs/15423887404/job/43405853684 at the end of running test_decorators.
CPython versions tested on:
CPython main branch
Operating systems tested on:
Windows