Comment 2 for bug 873679

StacktraceTop:
 um_user_set_automatic_login (user=0x0, enabled=1) at um-user.c:1075
 autologin_changed (object=<optimized out>, pspec=<optimized out>, d=0x7fb07d40d280) at um-user-panel.c:532
 g_closure_invoke (closure=0x7fb07d514600, return_value=0x0, n_param_values=2, param_values=0x7fb07d492f90, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.30.0/./gobject/gclosure.c:774
 signal_emit_unlocked_R (node=<optimized out>, detail=916, instance=0x7fb07d231200, emission_return=0x0, instance_and_params=0x7fb07d492f90) at /build/buildd/glib2.0-2.30.0/./gobject/gsignal.c:3272
 g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=<optimized out>) at /build/buildd/glib2.0-2.30.0/./gobject/gsignal.c:3003