#0  g_type_check_instance_cast (type_instance=0x7fcb1256f600, iface_type=80) at /build/buildd/glib2.0-2.31.22/./gobject/gtype.c:3999
        node = 0x10
        iface = 0x7fcb121c7700
        is_instantiatable = <optimized out>
        check = <optimized out>
#1  0x00007fcb005d37cc in got_users (object=<optimized out>, res=<optimized out>, data=0x7fcb1256f600) at um-user-manager.c:301
        manager = 0x7fcb1256f600
        result = <optimized out>
        error = 0x7fcb12739190
#2  0x00007fcb0fd7b97d in g_simple_async_result_complete (simple=0x7fcb1251df20) at /build/buildd/glib2.0-2.31.22/./gio/gsimpleasyncresult.c:767
        current_source = <optimized out>
        current_context = <optimized out>
        __PRETTY_FUNCTION__ = "g_simple_async_result_complete"
#3  0x00007fcb0fdd9166 in reply_cb (connection=<optimized out>, res=0x7fcb1251e090, user_data=<optimized out>) at /build/buildd/glib2.0-2.31.22/./gio/gdbusproxy.c:2614
        simple = 0x7fcb1251df20
        value = 0x0
        error = 0x7fcb12739190
        fd_list = 0x7fcb1250e580
#4  0x00007fcb0fd7b97d in g_simple_async_result_complete (simple=0x7fcb1251e090) at /build/buildd/glib2.0-2.31.22/./gio/gsimpleasyncresult.c:767
        current_source = <optimized out>
        current_context = <optimized out>
        __PRETTY_FUNCTION__ = "g_simple_async_result_complete"
#5  0x00007fcb0fdcf18e in g_dbus_connection_call_done (source=0x7fcb12315030, result=<optimized out>, user_data=0x7fcb121c7d60) at /build/buildd/glib2.0-2.31.22/./gio/gdbusconnection.c:5283
        simple = 0x7fcb1251e090
        connection = <optimized out>
        state = 0x7fcb121c7d60
        error = 0x7fcb12739190
        reply = 0x0
#6  0x00007fcb0fd7b97d in g_simple_async_result_complete (simple=0x7fcb1251deb0) at /build/buildd/glib2.0-2.31.22/./gio/gsimpleasyncresult.c:767
        current_source = <optimized out>
        current_context = <optimized out>
        __PRETTY_FUNCTION__ = "g_simple_async_result_complete"
#7  0x00007fcb0fd7baac in complete_in_idle_cb (data=0x7fcb1251deb0) at /build/buildd/glib2.0-2.31.22/./gio/gsimpleasyncresult.c:779
        simple = <optimized out>
#8  0x00007fcb0f80bd8a in g_main_dispatch (context=0x7fcb121d8ce0) at /build/buildd/glib2.0-2.31.22/./glib/gmain.c:2515
        dispatch = 0x7fcb0f8099e0 <g_idle_dispatch>
        was_in_call = 0
        user_data = 0x7fcb1251deb0
        callback = 0x7fcb0fd7ba90 <complete_in_idle_cb>
        cb_funcs = 0x7fcb0fab79a0
        cb_data = 0x7fcb12804a00
        current_source_link = {data = 0x7fcb12518050, next = 0x0}
        need_destroy = <optimized out>
        source = 0x7fcb12518050
        current = 0x7fcb12456c20
        i = <optimized out>
#9  g_main_context_dispatch (context=0x7fcb121d8ce0) at /build/buildd/glib2.0-2.31.22/./glib/gmain.c:3052
No locals.
#10 0x00007fcb0f80c150 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x7fcb121d8ce0, self=<optimized out>) at /build/buildd/glib2.0-2.31.22/./glib/gmain.c:3123
        timeout = 0
        some_ready = 1
        fds = <optimized out>
        max_priority = 0
        nfds = 4
        allocated_nfds = <optimized out>
#11 g_main_context_iterate (context=0x7fcb121d8ce0, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.22/./glib/gmain.c:3060
        some_ready = 1
#12 0x00007fcb0f80c214 in g_main_context_iteration (context=0x7fcb121d8ce0, may_block=1) at /build/buildd/glib2.0-2.31.22/./glib/gmain.c:3184
        retval = <optimized out>
#13 0x00007fcb0fda9a14 in g_application_run (application=0x7fcb1232f260, argc=<optimized out>, argv=0x7fff48279038) at /build/buildd/glib2.0-2.31.22/./gio/gapplication.c:1496
        arguments = 0x7fcb12525ec0
        status = 0
        i = <optimized out>
        __PRETTY_FUNCTION__ = "g_application_run"
#14 0x00007fcb1193a75a in main (argc=2, argv=0x7fff48279038) at control-center.c:207
        shell = <optimized out>
        application = 0x7fcb1232f260
        status = <optimized out>