Comment 4 for bug 1289289

StacktraceTop:
 _int_free (av=0xb6cae420 <main_arena>, p=<optimized out>, have_lock=0) at malloc.c:3996
 g_free (mem=mem@entry=0x9a95240) at /build/buildd/glib2.0-2.39.91/./glib/gmem.c:190
 weak_refs_notify (data=data@entry=0x9a95240) at /build/buildd/glib2.0-2.39.91/./gobject/gobject.c:2573
 g_data_set_internal (dataset=0x0, new_destroy_func=0x0, new_data=0x0, key_id=172, datalist=0x9bcdbd0) at /build/buildd/glib2.0-2.39.91/./glib/gdataset.c:407
 g_datalist_id_set_data_full (datalist=datalist@entry=0x9bcdbd0, key_id=172, data=data@entry=0x0, destroy_func=destroy_func@entry=0x0) at /build/buildd/glib2.0-2.39.91/./glib/gdataset.c:670