STINNER Victor <[email protected]> added the comment:
Oh, by design, NetworkConnectionNoServer.test_create_connection() has a race
condition:
port = socket_helper.find_unused_port()
with self.assertRaises(OSError) as cm:
socket.create_connection((HOST, port))
If another process starts to listen to the "unused" port between
find_unused_port() call and the create_connection() call, create_connection()
succeed and the test fails.
Maybe I should just add a comment mentioning the race condition. Or we should
find a more reliable way to get an error.
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<https://bugs.python.org/issue40949>
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