(gdb) bt
#0  0xb749ed85 in malloc_consolidate () from /lib/libc.so.6
#1  0xb74a12c7 in _int_malloc () from /lib/libc.so.6
#2  0xb74a1daa in _int_memalign () from /lib/libc.so.6
#3  0xb74a2d3b in memalign () from /lib/libc.so.6
#4  0xb74a2ee8 in posix_memalign () from /lib/libc.so.6
#5  0xb75bd19d in ?? () from /usr/lib/libglib-2.0.so.0
#6  0xbfd489d8 in ?? ()
#7  0x00000800 in ?? ()
#8  0x000007f8 in ?? ()
#9  0x00000800 in ?? ()
#10 0x0000042b in ?? ()
#11 0x00000010 in ?? ()
#12 0x00000048 in ?? ()
#13 0x00000012 in ?? ()
#14 0xb7e1e62c in __pthread_mutex_unlock_usercnt () from /lib/libpthread.so.0
#15 0xb75bdc04 in g_slice_alloc () from /usr/lib/libglib-2.0.so.0
#16 0xb75bdd3e in g_slice_alloc0 () from /usr/lib/libglib-2.0.so.0
#17 0xb7636756 in g_type_create_instance () from /usr/lib/libgobject-2.0.so.0
#18 0xb761d921 in ?? () from /usr/lib/libgobject-2.0.so.0
#19 0x0829d0c0 in ?? ()
#20 0xb760d620 in ?? () from /usr/lib/libglib-2.0.so.0
#21 0xbfd48b48 in ?? ()
#22 0xb75be2a3 in g_slice_free1 () from /usr/lib/libglib-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#23 0xb761bc7e in g_object_newv () from /usr/lib/libgobject-2.0.so.0
#24 0xb761c7ce in g_object_new_valist () from /usr/lib/libgobject-2.0.so.0
#25 0xb761c957 in g_object_new () from /usr/lib/libgobject-2.0.so.0
#26 0xb7b07244 in gtk_accel_label_new () from /usr/lib/libgtk-x11-2.0.so.0
#27 0xb7bc7d4a in gtk_image_menu_item_new_with_label ()
   from /usr/lib/libgtk-x11-2.0.so.0
#28 0xb4d1ba19 in ?? () from /usr/lib/xfce4/modules/xfce4_desktop_menu.so
#29 0x080c33d0 in ?? ()
#30 0x00000000 in ?? ()
(gdb)