Comment 2 for bug 1196873

StacktraceTop:
 lightdm_layout_get_name (layout=layout@entry=0x1f16720) at layout.c:211
 unity_greeter_get_layout_by_name (name=name@entry=0x2230150 "fr") at unity-greeter.c:666
 user_list_user_added_cb (self=0x1fa04f0, user=0x2023260) at user-list.c:4870
 g_cclosure_marshal_VOID__OBJECTv (closure=0x1fde020, return_value=<optimized out>, instance=<optimized out>, args=<optimized out>, marshal_data=0x0, n_params=<optimized out>, param_types=0x2022fe0) at /build/buildd/glib2.0-2.37.3/./gobject/gmarshal.c:1312
 _g_closure_invoke_va (closure=0x1fde020, return_value=0x0, instance=0x1fcdb40, args=0x7fff335a0ea8, n_params=1, param_types=0x2022fe0) at /build/buildd/glib2.0-2.37.3/./gobject/gclosure.c:840