(gdb) bt
#0  0x0000556e81d050a8 in user_change_automatic_login_authorized_cb (daemon=0x556e83376bc0 [Daemon], user=0x556e83396e40 [User], context=0x7f3524002e40 [GDBusMethodInvocation], data=0x1) at ../src/user.c:2662
#1  0x0000556e81d01148 in check_auth_cb (authority=<optimized out>, res=<optimized out>, data=0x556e83398530) at ../src/daemon.c:1683
#2  0x00007f354a3ee33f in g_simple_async_result_complete (simple=0x556e833bb3e0 [GSimpleAsyncResult]) at ../gio/gsimpleasyncresult.c:804
#3  0x00007f354a196264 in  () at /usr/lib/libpolkit-gobject-1.so.0
#4  0x00007f354a402ae4 in g_task_return_now (task=task@entry=0x556e8339a890 [GTask]) at ../gio/gtask.c:1309
#5  0x00007f354a4037cd in g_task_return (type=<optimized out>, task=0x556e8339a890 [GTask]) at ../gio/gtask.c:1378
#6  g_task_return (task=0x556e8339a890 [GTask], type=<optimized out>) at ../gio/gtask.c:1335
#7  0x00007f354a46d91e in reply_cb (connection=<optimized out>, res=<optimized out>, user_data=0x556e8339a890) at ../gio/gdbusproxy.c:2571
#8  0x00007f354a402ae4 in g_task_return_now (task=task@entry=0x556e8339a320 [GTask]) at ../gio/gtask.c:1309
#9  0x00007f354a4037cd in g_task_return (type=<optimized out>, task=0x556e8339a320 [GTask]) at ../gio/gtask.c:1378
#10 g_task_return (task=0x556e8339a320 [GTask], type=<optimized out>) at ../gio/gtask.c:1335
#11 0x00007f354a461013 in g_dbus_connection_call_done (source=0x556e83373070 [GDBusConnection], result=<optimized out>, user_data=0x556e8339a320) at ../gio/gdbusconnection.c:5887
#12 0x00007f354a402ae4 in g_task_return_now (task=task@entry=0x556e8339a3e0 [GTask]) at ../gio/gtask.c:1309
#13 0x00007f354a402b19 in complete_in_idle_cb (task=0x556e8339a3e0) at ../gio/gtask.c:1323
#14 0x00007f354a2051c0 in g_main_dispatch (context=0x556e83366f80) at ../glib/gmain.c:3460
#15 g_main_context_dispatch (context=context@entry=0x556e83366f80) at ../glib/gmain.c:4200
#16 0x00007f354a2055b9 in g_main_context_iterate (context=0x556e83366f80, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4276
#17 0x00007f354a20587f in g_main_loop_run (loop=loop@entry=0x556e83367190) at ../glib/gmain.c:4479
#18 0x0000556e81cff1d3 in main (argc=<optimized out>, argv=<optimized out>) at ../src/main.c:283