Steve Stagg <[email protected]> added the comment:
Minimal test case:
====
import sys, threading
def run():
for i in range(10000000):
sys.stderr.write(' =.= ')
if __name__ == '__main__':
threading.Thread(target=run, daemon=True).start()
===
I think this is expected behaviour. My knowledge isn't complete here, but
something similar to:
* During shutdown, the daemon threads are aborted
* In your example, the thread is very likely to be busy doing IO, so holding
the io lock.
* The abort you're seeing is an explicit check/abort to avoid a deadlock
(https://bugs.python.org/issue23309).
----------
nosy: +stestagg
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<https://bugs.python.org/issue42717>
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