This recent patch causes Thunar to crash when you have two windows or tabs open in the same directory and then delete a file inside of that directory.
Here is a backtrace for it:

Program received signal SIGSEGV, Segmentation fault.
0x00000000004367da in thunar_file_info_reload (file=file@entry=0xdd2210, cancellable=cancellable@entry=0x0) at thunar-file.c:976
976	  if (strcmp (file->basename, "kmsg") == 0
(gdb) bt
#0  0x00000000004367da in thunar_file_info_reload (file=file@entry=0xdd2210, cancellable=cancellable@entry=0x0) at thunar-file.c:976
#1  0x0000000000436c41 in thunar_file_load (file=file@entry=0xdd2210, error=error@entry=0x0, cancellable=0x0) at thunar-file.c:1178
#2  0x000000000043893b in thunar_file_get (gfile=gfile@entry=0x0, error=error@entry=0x0) at thunar-file.c:1237
#3  0x0000000000438c92 in thunar_file_monitor (monitor=<optimized out>, event_path=0xe178e0, other_path=0x0, event_type=<optimized out>, user_data=<optimized out>)
    at thunar-file.c:802
#4  0x00007fffefdef04c in ffi_call_unix64 () from /usr/lib64/libffi.so.6
#5  0x00007fffefdeea1a in ffi_call () from /usr/lib64/libffi.so.6
#6  0x00007ffff4e4b535 in g_cclosure_marshal_generic_va (closure=0xc275d0, return_value=0x0, instance=0xbae380, args_list=<optimized out>, marshal_data=0x0, n_params=3, 
    param_types=0xc24170) at /var/tmp/portage/dev-libs/glib-2.45.2/work/glib-2.45.2/gobject/gclosure.c:1594
#7  0x00007ffff4e4aac7 in _g_closure_invoke_va (closure=closure@entry=0xc275d0, return_value=return_value@entry=0x0, instance=instance@entry=0xbae380, 
    args=args@entry=0x7fffffffc2c8, n_params=3, param_types=0xc24170) at /var/tmp/portage/dev-libs/glib-2.45.2/work/glib-2.45.2/gobject/gclosure.c:864
#8  0x00007ffff4e63988 in g_signal_emit_valist (instance=0xbae380, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffffffc2c8)
    at /var/tmp/portage/dev-libs/glib-2.45.2/work/glib-2.45.2/gobject/gsignal.c:3216
#9  0x00007ffff4e645da in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=detail@entry=0)
    at /var/tmp/portage/dev-libs/glib-2.45.2/work/glib-2.45.2/gobject/gsignal.c:3363
#10 0x00007ffff50e4efb in g_file_monitor_emit_event (monitor=<optimized out>, child=<optimized out>, other_file=<optimized out>, event_type=<optimized out>)
    at /var/tmp/portage/dev-libs/glib-2.45.2/work/glib-2.45.2/gio/gfilemonitor.c:275
#11 0x00007ffff5189879 in g_file_monitor_source_dispatch (source=0xc1c620, callback=<optimized out>, user_data=<optimized out>)
    at /var/tmp/portage/dev-libs/glib-2.45.2/work/glib-2.45.2/gio/glocalfilemonitor.c:546
#12 0x00007ffff4b4bae4 in g_main_dispatch (context=0x73d3b0) at /var/tmp/portage/dev-libs/glib-2.45.2/work/glib-2.45.2/glib/gmain.c:3122
#13 g_main_context_dispatch (context=context@entry=0x73d3b0) at /var/tmp/portage/dev-libs/glib-2.45.2/work/glib-2.45.2/glib/gmain.c:3737
#14 0x00007ffff4b4bd38 in g_main_context_iterate (context=0x73d3b0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at /var/tmp/portage/dev-libs/glib-2.45.2/work/glib-2.45.2/glib/gmain.c:3808
#15 0x00007ffff4b4bffa in g_main_loop_run (loop=0x74ddc0) at /var/tmp/portage/dev-libs/glib-2.45.2/work/glib-2.45.2/glib/gmain.c:4002
#16 0x00007ffff6a2e3a7 in gtk_main () from /usr/lib64/libgtk-x11-2.0.so.0
#17 0x000000000041fd8d in main (argc=1, argv=0x7fffffffc6c8) at main.c:312