Stem hangs waiting for control port data
self.assertRaisesWith(stem.InvalidArguments, "DisableAllSwap, User cannot be changed while tor's running", controller.set_options, {'User': 'atagar', 'DisableAllSwap': '1'})
or
File "/home/travis/build/tlyu/tor/stem/test/integ/control/controller.py", line 793, in test_set_conf_when_immutable
self.assertRaisesWith(stem.InvalidArguments, "DisableAllSwap cannot be changed while tor's running", controller.set_conf, 'DisableAllSwap', '1')
We don't know why, because we don't have the tor logs or backtrace (#30234 (moved)).