Comment 3 for bug 1269886

For the record, this reproduces absolutely reliably (10 of 10) on my current trusty system as well:

 $ sudo apt-get install python-bzrlib.tests python-subunit
 $ apt-get source bzr
 $ cd bzr-*
 $ bzr selftest bzrlib.tests.test_smart_transport.TestSmartTCPServer.test_graceful_shutdown_waits_for_clients_to_stop

reproduces above test failure.