Comment 2 for bug 1208721

StacktraceTop:
 lightdm_get_layouts () at layout.c:121
 unity_greeter_get_layout_by_name (name=name@entry=0x1f93520 "us") at unity-greeter.c:667
 user_list_user_added_cb (self=0x1e184d0, user=0x1e2a610) at user-list.c:4870
 g_cclosure_marshal_VOID__OBJECTv (closure=0x1d58570, return_value=<optimized out>, instance=<optimized out>, args=<optimized out>, marshal_data=0x0, n_params=<optimized out>, param_types=0x1db11c0) at /build/buildd/glib2.0-2.37.3/./gobject/gmarshal.c:1312
 _g_closure_invoke_va (closure=0x1d58570, return_value=0x0, instance=0x7fae300048a0, args=0x7fffb517fcb8, n_params=1, param_types=0x1db11c0) at /build/buildd/glib2.0-2.37.3/./gobject/gclosure.c:840