#0  0x00007f2e38d389f0 in g_datalist_id_set_data_full ()
   from /usr/lib/libglib-2.0.so.0
#1  0x00007f2e38fdf86f in ?? () from /usr/lib/libgobject-2.0.so.0
#2  0x00007f2e38fdfa9f in g_object_unref () from /usr/lib/libgobject-2.0.so.0
#3  0x00007f2e30ce7fa0 in ?? ()
   from /usr/lib/gnome-settings-daemon-2.0/libmedia-keys.so
#4  0x00007f2e30ce89eb in ?? ()
   from /usr/lib/gnome-settings-daemon-2.0/libmedia-keys.so
#5  0x00007f2e3c9d115c in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#6  0x00007f2e3c9d2a7d in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#7  0x00007f2e3c9d4152 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#8  0x00007f2e3c9d456e in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#9  0x00007f2e38d4a3b4 in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#10 0x00007f2e38d4d6c5 in ?? () from /usr/lib/libglib-2.0.so.0
#11 0x00007f2e38d4d9e5 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#12 0x00007f2e3cd6ad63 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#13 0x00000000004035a9 in main ()