Crashed while running mediaplayer_app.tests.test_player_with_video.TestPlayerWithVideo.test_playback_button_states on image #200

Here is the link to the results: http://ci.ubuntu.com/smokeng/utopic/touch/mako/200:20140819.2:20140811.1/9800/mediaplayer_app/1556647/

The crash file is attached to this bug.

Here is the test log:

test-log: {{{
21:37:07.082 WARNING testcase:115 - No tracing available - install the python-autopilot-trace package!
21:37:07.088 WARNING testcase:162 - Process manager backend unavailable, application snapshot support disabled.
21:37:07.090 INFO _launcher:373 - Attempting to launch application 'mediaplayer-app' with arguments 'file:///usr/share/mediaplayer-app/videos/h264.avi
--fullscreen --desktop_file_hint=/usr/share/applications/mediaplayer-app.desktop' as a normal process
21:37:07.103 INFO _launcher:431 - Launching process: ['/usr/bin/mediaplayer-app', '-testability', 'file:///usr/share/mediaplayer-app/videos/h264.avi',
'--fullscreen', '--desktop_file_hint=/usr/share/applications/mediaplayer-app.desktop']
21:38:31.647 DEBUG _common:45 - Moving to object's globalRect coordinates.
21:38:31.652 DEBUG _uinput:470 - Tapping at: 384,640
21:39:52.666 DEBUG _common:45 - Moving to object's globalRect coordinates.
21:39:52.674 DEBUG _uinput:470 - Tapping at: 297,1217
21:40:18.370 INFO _launcher:544 - waiting for process to exit.
21:40:18.371 INFO _launcher:567 - Killing process 3613
}}}

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/mediaplayer_app/tests/test_player_with_video.py", line 63, in test_playback_button_states
    self.assertProperty(player, playing=False, paused=True)
  File "/usr/lib/python3/dist-packages/autopilot/testcase.py", line 452, in assertProperty
    attr = getattr(obj, prop_name, none_val)
  File "/usr/lib/python3/dist-packages/autopilot/introspection/dbus.py", line 412, in __getattr__
    self.refresh_state()
  File "/usr/lib/python3/dist-packages/autopilot/introspection/dbus.py", line 368, in refresh_state
    _, new_state = self._get_new_state()
  File "/usr/lib/python3/dist-packages/autopilot/introspection/dbus.py", line 428, in _get_new_state
    return self._backend.execute_query_get_data(self._query)[0]
  File "/usr/lib/python3/dist-packages/autopilot/introspection/backends.py", line 221, in execute_query_get_data
    query.server_query_bytes()
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 70, in __call__
    return self._proxy_method(*args, **keywords)
  File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoReply: Message did not receive a reply (timeout by message bus)