Starting in commit 4c7fad2dba108e5d6413579a23041445ae7df469, locks were added in rtspsrc. However, there is one case where you try to free the mutex when it wasn't initialized. Here is how I reproduced it:

1. Use an RTSP stream with digest authentication and HTTP tunneling.
2. Connect to the stream
3. The stream will return 401 unauthorized at first because you must re-authenticate with digest parameters.
4. At this point in gst_rtsp_conninfo_connect, rtspsrc will immediately call gst_rtsp_conninfo_close.
5. gst_rtsp_conninfo_close will then attempt to free the mutex with these lines:
g_mutex_clear (&info->send_lock);
g_mutex_clear (&info->recv_lock);
6. This will lead to a crash because the mutex was never initialized. The mutex's are only initialized after the initial connection is created which this path never gets to.