Comment 2 for bug 963033

StacktraceTop:
 __libc_message (do_abort=2, fmt=0x7f68045e4050 "*** glibc detected *** %s: %s: 0x%s ***\n") at ../sysdeps/unix/sysv/linux/libc_fatal.c:201
 malloc_printerr (action=3, str=0x7f68045e41b0 "double free or corruption (out)", ptr=<optimized out>) at malloc.c:5007
 gtk_file_system_model_finalize (object=0x2e37b20) at /build/buildd/gtk+3.0-3.3.20/./gtk/gtkfilesystemmodel.c:1008
 g_object_unref (_object=0x2e37b20) at /build/buildd/glib2.0-2.31.22/./gobject/gobject.c:3018
 stop_loading_and_clear_list_model (impl=0x237cae0, remove_from_treeview=0) at /build/buildd/gtk+3.0-3.3.20/./gtk/gtkfilechooserdefault.c:6654