Noise freezes indefinitely

I have my music library on a separate hard drive-- it doesn't automount on start-up, so trying to play a song when my library is unavailable (when I've forgotten to mount the drive) freezes Noise completely. The only solution is to force quit.

Terminal output (this repeats continuously):

[_LOG_LEVEL_FATAL 00:04:44.575551] Noise will not function properly.
[_LOG_LEVEL_FATAL 00:04:44.576905] noise_generic_list_media_played: assertion `m != NULL' failed

Backtrace:

#0 0x00007ffff5a0ce31 in g_slice_alloc () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1 0x00007ffff59f0e33 in g_list_append () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007ffff5a01982 in g_queue_push_tail () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007ffff79030d1 in gst_bus_post ()
   from /usr/lib/x86_64-linux-gnu/libgstreamer-0.10.so.0
#4 0x00007ffff7910f3b in gst_element_post_message ()
   from /usr/lib/x86_64-linux-gnu/libgstreamer-0.10.so.0
#5 0x00007ffff7911283 in gst_element_message_full ()
   from /usr/lib/x86_64-linux-gnu/libgstreamer-0.10.so.0
#6 0x00007fffe691df16 in ?? ()
   from /usr/lib/x86_64-linux-gnu/gstreamer-0.10/libgstplaybin.so
#7 0x00007fffe691edb2 in ?? ()
   from /usr/lib/x86_64-linux-gnu/gstreamer-0.10/libgstplaybin.so
#8 0x00007ffff7911dac in gst_element_change_state ()
   from /usr/lib/x86_64-linux-gnu/libgstreamer-0.10.so.0
#9 0x00007ffff79126d0 in ?? () from /usr/lib/x86_64-linux-gnu/libgstreamer-0.10.so.0
#10 0x00000000004ea563 in noise_streamer_setState ()
#11 0x00000000004ea4c6 in noise_streamer_play ()
#12 0x00000000004eeaa4 in noise_view_wrapper_play_first_media ()
#13 0x000000000043827f in noise_library_window_real_play_media ()
#14 0x00000000004384f4 in noise_library_window_play_media ()
#15 0x0000000000437f8c in noise_library_window_real_playClicked ()
#16 0x0000000000437fce in noise_library_window_playClicked ()
---Type <return> to continue, or q <return> to quit---
#17 0x00000000004eeae5 in noise_view_wrapper_play_first_media ()
#18 0x000000000043827f in noise_library_window_real_play_media ()
#19 0x00000000004384f4 in noise_library_window_play_media ()
#20 0x0000000000437f8c in noise_library_window_real_playClicked ()
#21 0x0000000000437fce in noise_library_window_playClicked ()