Program received signal SIGSEGV, Segmentation fault.
0xb6e32183 in g_type_check_instance_is_a () from /usr/lib/libgobject-2.0.so.0
(gdb) where
#0  0xb6e32183 in g_type_check_instance_is_a ()
   from /usr/lib/libgobject-2.0.so.0
#1  0x0907b6e4 in ?? ()
#2  0x00000002 in ?? ()
#3  0x01000001 in ?? ()
#4  0xb75eb060 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#5  0x08f85ac8 in ?? ()
#6  0x08f85ac8 in ?? ()
#7  0x08f85ac8 in ?? ()
#8  0xb7535d96 in gtk_widget_get_toplevel () from /usr/lib/libgtk-x11-2.0.so.0
#9  0xb7535d68 in gtk_widget_get_toplevel () from /usr/lib/libgtk-x11-2.0.so.0
#10 0xb7422be6 in gtk_propagate_event () from /usr/lib/libgtk-x11-2.0.so.0
#11 0xb75eb060 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#12 0x0828ecdc in ?? ()
#13 0x0828ecdc in ?? ()
#14 0xb7422d2d in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
#15 0x0828ecdc in ?? ()
#16 0xb6e56d00 in pthread_mutex_destroy () from /lib/tls/libpthread.so.0
Previous frame inner to this frame (corrupt stack?)