.
Thread 1 (process 4374):
#0  0x00007f9c6cd92a2c in g_type_check_instance_cast ()
   from /usr/lib/libgobject-2.0.so.0
#1  0x00007f9c6faa1b85 in ?? () from /usr/lib/libwnck-1.so.22
#2  0x00007f9c6faa237f in ?? () from /usr/lib/libwnck-1.so.22
#3  0x00007f9c6c8d619a in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#4  0x00007f9c6c8d9870 in ?? () from /usr/lib/libglib-2.0.so.0
#5  0x00007f9c6c8d9d3d in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#6  0x00007f9c6ecc02e7 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#7  0x00000000004123b9 in ?? ()
#8  0x00007f9c6c32c5a6 in __libc_start_main () from /lib/libc.so.6
#9  0x0000000000406e59 in ?? ()
#10 0x00007fff785eef08 in ?? ()
#11 0x000000000000001c in ?? ()
#12 0x0000000000000001 in ?? ()
#13 0x00007fff785f0b6b in ?? ()
#14 0x0000000000000000 in ?? ()