And another one. For some reason the gdb traces are sometimes different: 


geek@liv-inspiron:~$ gdb thunar
GNU gdb (Ubuntu 7.7-0ubuntu3) 7.7
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Reading symbols from thunar...Reading symbols from /usr/lib/debug/.build-id/7e/32b458faa818dfd7b90e73b285432feeed12c8.debug...done.
done.
(gdb) run
Starting program: /usr/bin/thunar 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffedaec700 (LWP 1035)]
[New Thread 0x7fffed2eb700 (LWP 1036)]
[New Thread 0x7fffe4f7f700 (LWP 1038)]

(thunar:1030): GLib-CRITICAL **: Source ID 174 was not found when attempting to remove it

(thunar:1030): Gdk-CRITICAL **: IA__gdk_window_get_window_type: assertion 'GDK_IS_WINDOW (window)' failed

(thunar:1030): GLib-CRITICAL **: Source ID 282 was not found when attempting to remove it

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffe4f7f700 (LWP 1038)]
_dbus_watch_invalidate (watch=0x0) at ../../dbus/dbus-watch.c:171
171	../../dbus/dbus-watch.c: No such file or directory.
(gdb) bt
#0  _dbus_watch_invalidate (watch=0x0) at ../../dbus/dbus-watch.c:171
#1  0x00007ffff54449cd in free_watches (transport=transport@entry=0x5555558495e0) at ../../dbus/dbus-transport-socket.c:83
#2  0x00007ffff5444a39 in socket_disconnect (transport=0x5555558495e0) at ../../dbus/dbus-transport-socket.c:1019
#3  0x00007ffff5443ea7 in _dbus_transport_disconnect (transport=0x5555558495e0) at ../../dbus/dbus-transport.c:509
#4  0x00007ffff5444675 in _dbus_transport_queue_messages (transport=transport@entry=0x5555558495e0) at ../../dbus/dbus-transport.c:1165
#5  0x00007ffff5444fae in do_reading (transport=0x5555558495e0) at ../../dbus/dbus-transport-socket.c:883
#6  0x00007ffff5445666 in socket_do_iteration (transport=0x5555558495e0, flags=6, timeout_milliseconds=<optimized out>) at ../../dbus/dbus-transport-socket.c:1194
#7  0x00007ffff54443ff in _dbus_transport_do_iteration (transport=0x5555558495e0, flags=0, flags@entry=6, timeout_milliseconds=1434736368, timeout_milliseconds@entry=25000)
    at ../../dbus/dbus-transport.c:976
#8  0x00007ffff542e9fc in _dbus_connection_do_iteration_unlocked (connection=connection@entry=0x555555849c60, pending=pending@entry=0x7fffcc010460, flags=flags@entry=6, 
    timeout_milliseconds=timeout_milliseconds@entry=25000) at ../../dbus/dbus-connection.c:1234
#9  0x00007ffff542f3a9 in _dbus_connection_block_pending_call (pending=pending@entry=0x7fffcc010460) at ../../dbus/dbus-connection.c:2415
#10 0x00007ffff543e79a in dbus_pending_call_block (pending=pending@entry=0x7fffcc010460) at ../../dbus/dbus-pending-call.c:748
#11 0x00007ffff56778c4 in dbus_g_proxy_end_call_internal (proxy=proxy@entry=0x555555830b70, call_id=call_id@entry=64, error=error@entry=0x7fffe4f7e758, first_arg_type=93824995154368, 
    args=args@entry=0x7fffe4f7e5d8) at dbus-gproxy.c:2399
#12 0x00007ffff567a829 in dbus_g_proxy_call (proxy=proxy@entry=0x555555830b70, method=method@entry=0x7ffff589b36a "GetProperty", error=error@entry=0x7fffe4f7e758, 
    first_arg_type=<optimized out>, first_arg_type@entry=64) at dbus-gproxy.c:2764
#13 0x00007ffff5894605 in xfconf_client_get_property (error=0x7fffe4f7e758, OUT_value=0x7fffe4f7e760, IN_property=0x7fffe4f7e8e0 "/misc-file-size-binary", IN_channel=0x555555852f80 "thunar", 
    proxy=0x555555830b70) at xfconf-dbus-bindings.h:69
#14 xfconf_cache_lookup_locked (cache=cache@entry=0x555555852190, property=property@entry=0x7fffe4f7e8e0 "/misc-file-size-binary", value=value@entry=0x7fffe4f7e860, error=error@entry=0x0)
    at xfconf-cache.c:670
#15 0x00007ffff5894dfe in xfconf_cache_lookup (cache=0x555555852190, property=property@entry=0x7fffe4f7e8e0 "/misc-file-size-binary", value=value@entry=0x7fffe4f7e860, error=error@entry=0x0)
    at xfconf-cache.c:714
#16 0x00007ffff5895325 in xfconf_channel_get_internal (channel=channel@entry=0x555555853800, property=property@entry=0x7fffe4f7e8e0 "/misc-file-size-binary", value=value@entry=0x7fffe4f7e860)
    at xfconf-channel.c:440
#17 0x00007ffff5896c96 in IA__xfconf_channel_get_property (channel=0x555555853800, property=property@entry=0x7fffe4f7e8e0 "/misc-file-size-binary", value=value@entry=0x7fffe4f7e8c0)
    at xfconf-channel.c:1258
#18 0x00005555555ae06f in thunar_preferences_get_property (object=<optimized out>, prop_id=<optimized out>, value=0x7fffe4f7e970, pspec=0x555555851350) at thunar-preferences.c:821
#19 0x00007ffff4e76005 in object_get_property (value=0x7fffe4f7e970, pspec=<optimized out>, object=0x555555831390) at /build/buildd/glib2.0-2.40.2/./gobject/gobject.c:1315
#20 g_object_get_valist (object=object@entry=0x555555831390, first_property_name=first_property_name@entry=0x5555555df444 "misc-file-size-binary", var_args=var_args@entry=0x7fffe4f7ea18)
    at /build/buildd/glib2.0-2.40.2/./gobject/gobject.c:2171
#21 0x00007ffff4e76497 in g_object_get (_object=_object@entry=0x555555831390, first_property_name=first_property_name@entry=0x5555555df444 "misc-file-size-binary")
    at /build/buildd/glib2.0-2.40.2/./gobject/gobject.c:2261
#22 0x00005555555cd265 in thunar_transfer_job_veryify_destination (error=0x7fffe4f7eb70, transfer_job=0x555556268160) at thunar-transfer-job.c:690
#23 thunar_transfer_job_execute (job=0x555556268160, error=0x7fffe4f7ebc8) at thunar-transfer-job.c:957
#24 0x00007ffff79aff60 in exo_job_scheduler_job_func (scheduler_job=0x555556153400, cancellable=<optimized out>, user_data=<optimized out>) at exo-job.c:317
#25 0x00007ffff510d4e6 in io_job_thread (task=<optimized out>, source_object=<optimized out>, task_data=0x555556153400, cancellable=<optimized out>)
    at /build/buildd/glib2.0-2.40.2/./gio/gioscheduler.c:85
#26 0x00007ffff5130065 in g_task_thread_pool_thread (thread_data=0x5555562681e0, pool_data=<optimized out>) at /build/buildd/glib2.0-2.40.2/./gio/gtask.c:1213
#27 0x00007ffff4bc488c in g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.40.2/./glib/gthreadpool.c:307
#28 0x00007ffff4bc3f05 in g_thread_proxy (data=0x5555560d2a30) at /build/buildd/glib2.0-2.40.2/./glib/gthread.c:764
#29 0x00007ffff4940182 in start_thread (arg=0x7fffe4f7f700) at pthread_create.c:312
---Type <return> to continue, or q <return> to quit---
#30 0x00007ffff466d30d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
(gdb) quit
A debugging session is active.

	Inferior 1 [process 1030] will be killed.

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