Comment 2 for bug 1010214

StacktraceTop:
 g_pointer_bit_lock (address=0x43, lock_bit=lock_bit@entry=2) at /build/buildd/glib2.0-2.33.1/./glib/gbitlock.c:398
 g_datalist_lock (datalist=0x24a88f0) at /build/buildd/glib2.0-2.33.1/./glib/gdataset.c:219
 g_datalist_id_get_data (datalist=datalist@entry=0x24a88f0, key_id=67) at /build/buildd/glib2.0-2.33.1/./glib/gdataset.c:811
 g_object_unref (_object=0x24a88e0) at /build/buildd/glib2.0-2.33.1/./gobject/gobject.c:2948
 g_list_foreach (list=<optimized out>, list@entry=0x7fbabc073440, func=0x7fbb074d1f80 <g_object_unref>, user_data=user_data@entry=0x0) at /build/buildd/glib2.0-2.33.1/./glib/glist.c:900