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gh-88110: Clear concurrent.futures.thread._threads_queues after fork to avoid joining parent process' threads (GH-126098)

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Threads are gone after fork, so clear the queues too. Otherwise the
child process (here created via multiprocessing.Process) crashes on
interpreter exit.

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Andrei Bodrov 2024-11-22 19:20:34 +03:00 • committed by GitHub
parent 7725c0371a
commit 1848ce61f3
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Lib/concurrent/futures/thread.py
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@ -41,6 +41,7 @@ if hasattr(os, 'register_at_fork'):
os.register_at_fork(before=_global_shutdown_lock.acquire,
after_in_child=_global_shutdown_lock._at_fork_reinit,
after_in_parent=_global_shutdown_lock.release)
os.register_at_fork(after_in_child=_threads_queues.clear)
class WorkerContext: