#0  0x0038269c in g_type_check_instance_cast (type_instance=0x94e8d38, 
    iface_type=80) at /build/buildd/glib2.0-2.27.93/gobject/gtype.c:1766
	node = (TypeNode *) 0x0
	iface = (TypeNode *) 0x95f2140
	is_instantiatable = <value optimized out>
	check = <value optimized out>
#1  0x023479aa in dbusmenu_cache_freed (data=0x94e8d38, obj=0x95f2140)
    at /build/buildd/libdbusmenu-0.3.96/./libdbusmenu-gtk/parser.c:529
	pdata = <value optimized out>
#2  0x0035b701 in weak_refs_notify (data=0x92f5a00)
    at /build/buildd/glib2.0-2.27.93/gobject/gobject.c:2386
	wstack = (WeakRefStack *) 0x92f5a00
	i = <value optimized out>
#3  0x07353f79 in g_datalist_id_set_data_full (datalist=0x95f2148, key_id=55, 
    data=0x0, destroy_func=0)
    at /build/buildd/glib2.0-2.27.93/glib/gdataset.c:947
	__PRETTY_FUNCTION__ = "g_datalist_id_set_data_full"
#4  0x092f5a00 in ?? ()
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)