Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xb68db960 (LWP 31267)]
0xb77d577c in g_type_check_instance_cast () from /usr/lib/libgobject-2.0.so.0
(gdb) bt
#0  0xb77d577c in g_type_check_instance_cast ()
   from /usr/lib/libgobject-2.0.so.0
#1  0xb77c4eca in g_cclosure_marshal_VOID__OBJECT ()
   from /usr/lib/libgobject-2.0.so.0
#2  0xb77b86f9 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
#3  0xb77ccc3d in ?? () from /usr/lib/libgobject-2.0.so.0
#4  0x08089f58 in ?? ()
#5  0x00000000 in ?? ()