#0  gtk_gc_key_hash (key=0x0) at /build/buildd/gtk+2.0-2.24.10/gtk/gtkgc.c:206
        keyval = 0x0
        hash_val = 0
#1  0x00007fbd8e277f23 in g_hash_table_lookup (hash_table=0x7fbd94ed5120, key=0x0) at /build/buildd/glib2.0-2.32.0/./glib/ghash.c:1072
        node_hash = <optimized out>
        __PRETTY_FUNCTION__ = "g_hash_table_lookup"
#2  0x00007fbd8e25abbf in g_cache_remove (cache=0x7fbd94e5e120, value=0x7fbd94f17950) at /build/buildd/glib2.0-2.32.0/./glib/deprecated/gcache.c:290
        node = 0x7fbd94e48210
        key = 0x0
        __PRETTY_FUNCTION__ = "g_cache_remove"
#3  0x00007fbd8ddba40c in gtk_style_real_unrealize (style=0x7fbd94e48200) at /build/buildd/gtk+2.0-2.24.10/gtk/gtkstyle.c:2115
No locals.
#4  0x00007fbd8e74709a in g_cclosure_new (callback_func=0x7fbd94ee55e0, user_data=0x0, destroy_data=0x17) at /build/buildd/glib2.0-2.32.0/./gobject/gclosure.c:923
        closure = <optimized out>
        __PRETTY_FUNCTION__ = "g_cclosure_new"
#5  0x0000000000000000 in ?? ()
No symbol table info available.