(gdb) bt
#0  0x0000000204e1046a in munmap () from /usr/lib/libc.so.60.1
#1  0x000000020df80175 in g_mapped_file_destroy (file=0x20f7cb960) at gmappedfile.c:103
#2  0x000000020dfa69cc in g_time_zone_unref (tz=0x200b5cac0) at gtimezone.c:171
#3  0x000000020df6824d in g_date_time_unref (datetime=0x20f7cb5a0) at gdatetime.c:476
#4  0x000000020be03a31 in gnome_wall_clock_get_type () from /usr/local/lib/libgnome-desktop-3.so.1.0
#5  0x000000020be04942 in gnome_wall_clock_get_type () from /usr/local/lib/libgnome-desktop-3.so.1.0
#6  0x000000020df7c1d5 in g_main_context_dispatch (context=0x2130ff200) at gmain.c:2445
#7  0x000000020df7fa7c in g_main_context_iterate (context=0x2130ff200, block=1, dispatch=1, self=Variable "self" is not available.
) at gmain.c:3093
#8  0x000000020df7ff9e in g_main_context_iteration (context=0x2130ff200, may_block=1) at gmain.c:3156
#9  0x0000000212a14e55 in gtk_main_iteration () from /usr/local/lib/libgtk-3.so.1.0
#10 0x000000000040e159 in gs_manager_set_active (manager=0x2052cb120, active=Variable "active" is not available.
) at gs-manager.c:1275
#11 0x000000000040a198 in listener_active_changed_cb (listener=Variable "listener" is not available.
) at gs-monitor.c:236
#12 0x0000000000417512 in gs_marshal_BOOLEAN__BOOLEAN (closure=0x20a641380, return_value=0x7f7ffffd53b0, n_param_values=Variable "n_param_values" is not available.
)
    at gs-marshal.c:161
#13 0x000000020333e399 in g_closure_invoke (closure=0x20a641380, return_value=0x7f7ffffd53b0, n_param_values=2, 
    param_values=0x207a94e70, invocation_hint=0x7f7ffffd5210) at gclosure.c:774
#14 0x0000000203354ba4 in signal_emit_unlocked_R (node=0x207bbde00, detail=0, instance=0x20c656ec0, 
    emission_return=0x7f7ffffd53b0, instance_and_params=0x207a94e70) at gsignal.c:3272
#15 0x000000020335660b in g_signal_emit_valist (instance=0x20c656ec0, signal_id=Variable "signal_id" is not available.
) at gsignal.c:3013
#16 0x0000000203356d03 in g_signal_emit (instance=Variable "instance" is not available.
) at gsignal.c:3060
#17 0x000000000040bccf in gs_listener_set_active (listener=0x20c656ec0, active=1) at gs-listener-dbus.c:253
#18 0x000000000040cbc8 in gs_listener_set_session_idle (listener=0x20c656ec0, idle=Variable "idle" is not available.
) at gs-listener-dbus.c:196
#19 0x0000000000417512 in gs_marshal_BOOLEAN__BOOLEAN (closure=0x20a642380, return_value=0x7f7ffffd59b0, n_param_values=Variable "n_param_values" is not available.
)
    at gs-marshal.c:161
#20 0x000000020333e399 in g_closure_invoke (closure=0x20a642380, return_value=0x7f7ffffd59b0, n_param_values=2, 
    param_values=0x2135395d0, invocation_hint=0x7f7ffffd5810) at gclosure.c:774
#21 0x0000000203354ba4 in signal_emit_unlocked_R (node=0x20e8f7b00, detail=0, instance=0x206cd70f0, 
    emission_return=0x7f7ffffd59b0, instance_and_params=0x2135395d0) at gsignal.c:3272
#22 0x000000020335660b in g_signal_emit_valist (instance=0x206cd70f0, signal_id=Variable "signal_id" is not available.
) at gsignal.c:3013
#23 0x0000000203356d03 in g_signal_emit (instance=Variable "instance" is not available.
) at gsignal.c:3060
#24 0x000000000040ae6a in _gs_watcher_set_session_idle (watcher=0x206cd70f0, is_idle=1) at gs-watcher-x11.c:225
#25 0x000000000040b33b in on_idle_timeout (watcher=0x206cd70f0) at gs-watcher-x11.c:331
#26 0x000000020df7c98b in g_timeout_dispatch (source=0x202aa9e00, callback=Variable "callback" is not available.
) at gmain.c:3911
#27 0x000000020df7c1d5 in g_main_context_dispatch (context=0x2130ff200) at gmain.c:2445
#28 0x000000020df7fa7c in g_main_context_iterate (context=0x2130ff200, block=1, dispatch=1, self=Variable "self" is not available.
) at gmain.c:3093
#29 0x000000020df7fd9a in g_main_loop_run (loop=0x20f5921e0) at gmain.c:3301
#30 0x0000000212a14f5d in gtk_main () from /usr/local/lib/libgtk-3.so.1.0
#31 0x0000000000409aaf in main (argc=1, argv=0x7f7ffffd5d20) at gnome-screensaver.c:105
(gdb) bt full
#0  0x0000000204e1046a in munmap () from /usr/lib/libc.so.60.1
No symbol table info available.
#1  0x000000020df80175 in g_mapped_file_destroy (file=0x20f7cb960) at gmappedfile.c:103
No locals.
#2  0x000000020dfa69cc in g_time_zone_unref (tz=0x200b5cac0) at gtimezone.c:171
        ref_count = 1
        __PRETTY_FUNCTION__ = "g_time_zone_unref"
#3  0x000000020df6824d in g_date_time_unref (datetime=0x20f7cb5a0) at gdatetime.c:476
        __PRETTY_FUNCTION__ = "g_date_time_unref"
#4  0x000000020be03a31 in gnome_wall_clock_get_type () from /usr/local/lib/libgnome-desktop-3.so.1.0
No symbol table info available.
#5  0x000000020be04942 in gnome_wall_clock_get_type () from /usr/local/lib/libgnome-desktop-3.so.1.0
No symbol table info available.
#6  0x000000020df7c1d5 in g_main_context_dispatch (context=0x2130ff200) at gmain.c:2445
No locals.
#7  0x000000020df7fa7c in g_main_context_iterate (context=0x2130ff200, block=1, dispatch=1, self=Variable "self" is not available.
) at gmain.c:3093
        got_ownership = Variable "got_ownership" is not available.

