#0  0x00007f1e4690d967 in tz_query_answered (object=0x7f1e74f56c00, res=<optimized out>, self=self@entry=0x7f1e74e77310) at datetime-prefs.c:272
        _pp = 0xaaaaaaaaaaaaab02
        _p = <optimized out>
        error = 0x7f1e752a5b70
        answers = 0x0
        timezone = 0x7f1e74ea2c80 ""
#1  0x00007f1e71a6103e in g_simple_async_result_complete (simple=0x7f1e75241840) at /build/buildd/glib2.0-2.33.6/./gio/gsimpleasyncresult.c:775
        current_source = <optimized out>
        current_context = <optimized out>
        __PRETTY_FUNCTION__ = "g_simple_async_result_complete"
#2  0x00007f1e71abfc73 in reply_cb (connection=<optimized out>, res=0x7f1e74eb72d0, user_data=user_data@entry=0x7f1e75241840) at /build/buildd/glib2.0-2.33.6/./gio/gdbusproxy.c:2632
        simple = 0x7f1e75241840
        value = <optimized out>
        error = 0x7f1e750e4520
        fd_list = 0x7f1e74ea2c80
#3  0x00007f1e71a6103e in g_simple_async_result_complete (simple=0x7f1e74eb72d0) at /build/buildd/glib2.0-2.33.6/./gio/gsimpleasyncresult.c:775
        current_source = <optimized out>
        current_context = <optimized out>
        __PRETTY_FUNCTION__ = "g_simple_async_result_complete"
#4  0x00007f1e71ab5dce in g_dbus_connection_call_done (source=0x7f1e74ea6c80, result=<optimized out>, user_data=user_data@entry=0x7f1e753d4830) at /build/buildd/glib2.0-2.33.6/./gio/gdbusconnection.c:5333
        simple = 0x7f1e74eb72d0
        connection = <optimized out>
        state = 0x7f1e753d4830
        error = 0x7f1e752a5b40
        reply = 0x0
#5  0x00007f1e71a6103e in g_simple_async_result_complete (simple=0x7f1e75105c10) at /build/buildd/glib2.0-2.33.6/./gio/gsimpleasyncresult.c:775
        current_source = <optimized out>
        current_context = <optimized out>
        __PRETTY_FUNCTION__ = "g_simple_async_result_complete"
#6  0x00007f1e71a6116c in complete_in_idle_cb (data=0x7f1e75105c10) at /build/buildd/glib2.0-2.33.6/./gio/gsimpleasyncresult.c:787
        simple = <optimized out>
#7  0x00007f1e714f0c65 in g_main_dispatch (context=0x7f1e74e6a000) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:2691
        dispatch = 0x7f1e714ee0e0 <g_idle_dispatch>
        was_in_call = 0
        user_data = 0x7f1e75105c10
        callback = 0x7f1e71a61150 <complete_in_idle_cb>
        cb_funcs = 0x7f1e7179d9a0
        cb_data = 0x7f1e74f18950
        current_source_link = {data = 0x7f1e7510fa30, next = 0x0}
        need_destroy = <optimized out>
        source = 0x7f1e7510fa30
        current = 0x7f1e74e65620
        i = <optimized out>
#8  g_main_context_dispatch (context=context@entry=0x7f1e74e6a000) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:3195
No locals.
#9  0x00007f1e714f0f98 in g_main_context_iterate (context=context@entry=0x7f1e74e6a000, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:3266
        max_priority = 0
        timeout = 0
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = <optimized out>
        fds = 0x7f1e7510d4f0
#10 0x00007f1e714f1054 in g_main_context_iteration (context=0x7f1e74e6a000, context@entry=0x0, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.33.6/./glib/gmain.c:3327
        retval = <optimized out>
#11 0x00007f1e71a9072c in g_application_run (application=0x7f1e74ea6380, argc=argc@entry=2, argv=argv@entry=0x7fff807c3ea8) at /build/buildd/glib2.0-2.33.6/./gio/gapplication.c:1607
        arguments = 0x7f1e75159ea0
        status = 0
        i = <optimized out>
        __PRETTY_FUNCTION__ = "g_application_run"
#12 0x00007f1e7366e86a in main (argc=2, argv=0x7fff807c3ea8) at control-center.c:207
        shell = <optimized out>
        application = 0x7f1e74ea6380
        status = <optimized out>