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[WIP] bpo-40091: Fix a crash in logging after fork #19196

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[WIP] bpo-40091: Fix a crash in logging after fork #19196

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2 changes: 1 addition & 1 deletion Lib/logging/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -257,8 +257,8 @@ def _after_at_fork_child_reinit_locks():
# Similar to what PyErr_WriteUnraisable does.
print("Ignoring exception from logging atfork", instance,
"._reinit_lock() method:", err, file=sys.stderr)
_releaseLock() # Acquired by os.register_at_fork(before=.

_lock = threading.RLock()

os.register_at_fork(before=_acquireLock,
after_in_child=_after_at_fork_child_reinit_locks,
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2020-03-27-18-03-12.bpo-40091.ZIh4oL.rst
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@@ -0,0 +1,2 @@
Fix a crash in the :mod:`logging` module after fork in the process process:
reset the main logging lock.