This is the terminal output:
(rhythmbox:5912): Rhythmbox-WARNING **: Could not open device /dev/radio0
(rhythmbox:5912): Gdk-CRITICAL **: gdk_error_trap_pop_internal: assertion `trap != NULL' failed
** (rhythmbox:5912): WARNING **: Error calling get_info: Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 707, in _message_cb
retval = candidate_method(self, *args, **keywords)
File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/platform/ipc/linux.py", line 756, in get_info
return self.service.folders.get_info(path)
File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/interaction_interfaces.py", line 166, in inner
result = f(*new_args, **new_kwargs)
File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/logger.py", line 283, in inner
res = f(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/interaction_interfaces.py", line 721, in get_info
mdobj = self.fs_manager.get_by_path(path)
File "/usr/lib/python2.7/dist-packages/ubuntuone-client/ubuntuone/syncdaemon/filesystem_manager.py", line 795, in get_by_path
mdid = self._idx_path[path]
KeyError: '/home/user/.ubuntuone/Purchased from Ubuntu One'
** (rhythmbox:5912): CRITICAL **: syncdaemon_folder_info_get_subscribed: assertion `SYNCDAEMON_IS_FOLDER_INFO (finfo)' failed
Segmentation fault (core dumped)"
How can I stop Rhythmbox from crashing?