.
Thread 4 (process 23571):
#0  0x00007f5e2df792e9 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00007f5e32a1ae38 in ?? () from /usr/lib/libbrasero-utils.so.0
#2  0x00007f5e2e3f75c4 in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f5e2df753ba in start_thread () from /lib/libpthread.so.0
#4  0x00007f5e2dce21bd in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()
.
Thread 3 (process 23147):
#0  0x00007f5e2df792e9 in pthread_cond_wait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00007f5e148ff93b in ?? () from /usr/lib/libjack.so.0
#2  0x00007f5e2df753ba in start_thread () from /lib/libpthread.so.0
#3  0x00007f5e2dce21bd in clone () from /lib/libc.so.6
#4  0x0000000000000000 in ?? ()
.
Thread 2 (process 23795):
#0  0x00007f5e2df7956d in pthread_cond_timedwait@@GLIBC_2.3.2 ()
   from /lib/libpthread.so.0
#1  0x00007f5e31ed9612 in ?? () from /usr/lib/libgthread-2.0.so.0
#2  0x00007f5e2e3a9d4f in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007f5e2e3a9e5f in g_async_queue_timed_pop ()
   from /usr/lib/libglib-2.0.so.0
#4  0x00007f5e2e3f8b30 in ?? () from /usr/lib/libglib-2.0.so.0
#5  0x00007f5e2e3f75c4 in ?? () from /usr/lib/libglib-2.0.so.0
#6  0x00007f5e2df753ba in start_thread () from /lib/libpthread.so.0
#7  0x00007f5e2dce21bd in clone () from /lib/libc.so.6
#8  0x0000000000000000 in ?? ()
.
Thread 1 (process 22996):
#0  0x00007f5e32a14d29 in brasero_jacket_edit_freeze ()
   from /usr/lib/libbrasero-utils.so.0
#1  0x00007f5e32e7fbd3 in brasero_session_edit_cover ()
   from /usr/lib/libbrasero-burn.so.0
#2  0x00000000004368a3 in brasero_project_create_audio_cover ()
#3  0x000000000043e222 in ?? ()
#4  0x00007f5e2e86b62e in g_closure_invoke ()
   from /usr/lib/libgobject-2.0.so.0
#5  0x00007f5e2e881836 in ?? () from /usr/lib/libgobject-2.0.so.0
#6  0x00007f5e2e882c7e in g_signal_emit_valist ()
   from /usr/lib/libgobject-2.0.so.0
#7  0x00007f5e2e883203 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#8  0x00007f5e3070c903 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#9  0x00007f5e2e86b62e in g_closure_invoke ()
   from /usr/lib/libgobject-2.0.so.0
#10 0x00007f5e2e881145 in ?? () from /usr/lib/libgobject-2.0.so.0
#11 0x00007f5e2e882c7e in g_signal_emit_valist ()
   from /usr/lib/libgobject-2.0.so.0
#12 0x00007f5e2e883203 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#13 0x00007f5e30912209 in gtk_widget_activate ()
   from /usr/lib/libgtk-x11-2.0.so.0
#14 0x00007f5e307fd4cd in gtk_menu_shell_activate_item ()
   from /usr/lib/libgtk-x11-2.0.so.0
#15 0x00007f5e307ff202 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#16 0x00007f5e307eca03 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#17 0x00007f5e2e86b62e in g_closure_invoke ()
   from /usr/lib/libgobject-2.0.so.0
#18 0x00007f5e2e881508 in ?? () from /usr/lib/libgobject-2.0.so.0
#19 0x00007f5e2e882b3e in g_signal_emit_valist ()
   from /usr/lib/libgobject-2.0.so.0
#20 0x00007f5e2e883203 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#21 0x00007f5e3090bbdf in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#22 0x00007f5e307e39d4 in gtk_propagate_event ()
   from /usr/lib/libgtk-x11-2.0.so.0
#23 0x00007f5e307e4af3 in gtk_main_do_event ()
   from /usr/lib/libgtk-x11-2.0.so.0
#24 0x00007f5e3043a90c in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#25 0x00007f5e2e3ce8fe in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#26 0x00007f5e2e3d1fd8 in ?? () from /usr/lib/libglib-2.0.so.0
#27 0x00007f5e2e3d2435 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#28 0x00007f5e307e5027 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#29 0x00000000004571c4 in brasero_app_run_mainwin ()
#30 0x000000000042039d in main ()