Description of problem:
Steps to reproduce:

1. Open Gnome Tweak Tool.

2. Click ==> Desktop

3. Change background to some other picture (keep note of this directory).

4. In the directory where the picture was located now create a new document.

5. Gnome Tweak tool should crash.

Version-Release number of selected component:
gnome-tweak-tool-3.14.0-1.fc22

Additional info:
reporter:       libreport-2.2.3
backtrace_rating: 4
cmdline:        python /usr/bin/gnome-tweak-tool
crash_function: gtk_tree_row_ref_deleted
executable:     /usr/bin/python2.7
kernel:         3.17.0-0.rc6.git2.1.fc22.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 gtk_tree_row_ref_deleted at gtktreemodel.c:2160
 #1 gtk_tree_row_reference_deleted at gtktreemodel.c:2539
 #2 gtk_tree_view_row_deleted at gtktreeview.c:9229
 #7 emit_row_deleted_for_row at gtkfilesystemmodel.c:331
 #8 remove_file at gtkfilesystemmodel.c:1915
 #9 gtk_file_system_model_monitor_change at gtkfilesystemmodel.c:1260
 #10 ffi_call_unix64 at ../src/x86/unix64.S:76
 #11 ffi_call at ../src/x86/ffi64.c:525
 #12 g_cclosure_marshal_generic_va at gclosure.c:1541
 #13 _g_closure_invoke_va at gclosure.c:831

Potential duplicate: bug 1098743