Comment 2 for bug 1291688

StacktraceTop:
 cc_appearance_xml_load_xml_internal (xml=xml@entry=0x2eb3d20, filename=filename@entry=0x2e12e30 "/usr/share/gnome-background-properties/trusty-wallpapers.xml", in_thread=in_thread@entry=0) at cc-appearance-xml.c:303
 gnome_wp_file_changed (monitor=<optimized out>, file=<optimized out>, other_file=<optimized out>, event_type=<optimized out>, data=0x2eb3d20) at cc-appearance-xml.c:337
 ffi_call_unix64 () at ../src/x86/unix64.S:76
 ffi_call (cif=cif@entry=0x7fff5d60fcf0, fn=0x7f858c110180 <gnome_wp_file_changed>, rvalue=0x7fff5d60fc20, avalue=avalue@entry=0x7fff5d60fba0) at ../src/x86/ffi64.c:522
 g_cclosure_marshal_generic_va (closure=0x7f857801be80, return_value=0x0, instance=0x2fa5360, args_list=<optimized out>, marshal_data=0x0, n_params=3, param_types=0x1556520) at /build/buildd/glib2.0-2.39.91/./gobject/gclosure.c:1541