https://mail.python.org/archives/list/docs@python.org/thread/NNMI6QRPCYM7LAROU56MNB43WSKJRMTZ/
Mailman 3 [issue6634] sys.exit() called from threads other than the main one: undocumented...
https://mail.python.org/archives/list/docs@python.org/thread/D5ORU7QOMFXEEOMVCAQJHGRZBNNWFZAV/?sort=date
Mailman 3 [issue6634] sys.exit() called from threads other than the main one: undocumented...