#0  0x00007faaa15e0cfd in g_type_check_instance_cast (
    type_instance=0x292e020, iface_type=39018608)
    at /build/buildd/glib2.0-2.28.0/gobject/gtype.c:1766
	node = (TypeNode *) 0x25aa4c0
	iface = (TypeNode *) 0x7fff721a84b0
	is_instantiatable = <value optimized out>
	check = <value optimized out>
#1  0x00007faa9803ba9e in theme_changed_cb (theme=0x25098b0, data=0x292e020)
    at /build/buildd/libdbusmenu-0.3.98/./libdbusmenu-gtk/parser.c:123
	image = <value optimized out>
	pmi = <value optimized out>
#2  0x00007faaa15bb7fc in g_closure_invoke (closure=0x2976930, 
    return_value=0x0, n_param_values=1, param_values=0x25aa4c0, 
    invocation_hint=0x7fff721a84b0)
    at /build/buildd/glib2.0-2.28.0/gobject/gclosure.c:197
	marshal = <value optimized out>
	marshal_data = <value optimized out>
	in_marshal = 0
	__PRETTY_FUNCTION__ = "g_closure_invoke"
#3  0x00000000028ddf30 in ?? ()
No symbol table info available.
#4  0x0000000000000000 in ?? ()
No symbol table info available.