Thread 1 "gnome-shell" received signal SIGSEGV, Segmentation fault.
g_time_zone_ref (tz=tz@entry=0x0) at gtimezone.c:267
(gdb) bt
#0  g_time_zone_ref (tz=tz@entry=0x0) at gtimezone.c:267
#1  0x00007efd6cc57b5e in g_date_time_alloc (tz=tz@entry=0x0) at gdatetime.c:427
#2  0x00007efd6cc57f42 in g_date_time_from_instant (tz=tz@entry=0x0, instant=63636418550974992) at gdatetime.c:522
#3  0x00007efd6cc58182 in g_date_time_new_from_timeval (tv=0x7ffe57148cc0, tz=0x0) at gdatetime.c:645
#4  g_date_time_new_now (tz=0x0) at gdatetime.c:703
#5  0x00007efd656f63c3 in update_clock (data=0x55afc71ad1c0) at gnome-wall-clock.c:350
#6  0x00007efd6cf4830d in g_closure_invoke (closure=0x55afc6dedb10, return_value=0x0, n_param_values=2, param_values=0x7ffe57148f00, invocation_hint=0x7ffe57148e80) at gclosure.c:804
#7  0x00007efd6cf5a9ee in signal_emit_unlocked_R (node=node@entry=0x55afc1c953e0, detail=detail@entry=2625, instance=instance@entry=0x55afc3ed6520, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7ffe57148f00) at gsignal.c:3635
#8  0x00007efd6cf63205 in g_signal_emit_valist (instance=0x55afc3ed6520, signal_id=<optimized out>, detail=2625, var_args=var_args@entry=0x7ffe571490e0) at gsignal.c:3391
#9  0x00007efd6cf63b6f in g_signal_emit (instance=instance@entry=0x55afc3ed6520, signal_id=<optimized out>, detail=<optimized out>) at gsignal.c:3447
#10 0x00007efd6e7d7492 in g_settings_real_change_event (settings=0x55afc3ed6520, keys=0x55afc9542e30, n_keys=<optimized out>) at gsettings.c:386
#11 0x00007efd69d39bde in ffi_call_unix64 () from /lib64/libffi.so.6
#12 0x00007efd69d3954f in ffi_call () from /lib64/libffi.so.6
#13 0x00007efd6cf48efd in g_cclosure_marshal_generic_va (closure=0x55afc1c8ac40, return_value=0x7ffe57149610, instance=<optimized out>, args_list=<optimized out>, marshal_data=<optimized out>, n_params=2, param_types=0x55afc1c8ac70) at gclosure.c:1604
#14 0x00007efd6cf48546 in _g_closure_invoke_va (closure=0x55afc1c8ac40, return_value=0x7ffe57149610, instance=0x55afc3ed6520, args=0x7ffe571496e0, n_params=2, param_types=0x55afc1c8ac70) at gclosure.c:867
#15 0x00007efd6cf62ec9 in g_signal_emit_valist (instance=0x55afc3ed6520, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7ffe571496e0) at gsignal.c:3300
#16 0x00007efd6cf63b6f in g_signal_emit (instance=instance@entry=0x55afc3ed6520, signal_id=<optimized out>, detail=detail@entry=0) at gsignal.c:3447
#17 0x00007efd6e7d7c08 in settings_backend_path_changed (target=0x55afc3ed6520, backend=<optimized out>, path=<optimized out>, origin_tag=<optimized out>) at gsettings.c:461
#18 0x00007efd6e7d272a in g_settings_backend_invoke_closure (user_data=user_data@entry=0x55afc63f68c0) at gsettingsbackend.c:267
#19 0x00007efd6cc6cc27 in g_idle_dispatch (source=0x7efd440363d0, callback=0x7efd6e7d2710 <g_settings_backend_invoke_closure>, user_data=0x55afc63f68c0) at gmain.c:5587
#20 0x00007efd6cc70247 in g_main_dispatch (context=0x55afc18f7b10) at gmain.c:3235
#21 g_main_context_dispatch (context=context@entry=0x55afc18f7b10) at gmain.c:3900
#22 0x00007efd6cc705e8 in g_main_context_iterate (context=0x55afc18f7b10, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3973
#23 0x00007efd6cc70902 in g_main_loop_run (loop=0x55afc1c97730) at gmain.c:4169
#24 0x00007efd7168ed0c in meta_run () at core/main.c:648
#25 0x000055afc02bb4a7 in main (argc=<optimized out>, argv=<optimized out>) at main.c:454
