Comment 2 for bug 917739

StacktraceTop:
 g_type_check_instance_is_a (type_instance=0x97252a8, iface_type=151610184) at /build/buildd/glib2.0-2.31.10/./gobject/gtype.c:3965
 g_file_is_native (file=0x97252a8) at /build/buildd/glib2.0-2.31.10/./gio/gfile.c:335
 nautilus_bookmark_uri_known_not_to_exist (bookmark=0x97252a8) at nautilus-bookmark.c:654
 activate_bookmark_in_menu_item (action=0x0, user_data=0x9725998) at nautilus-window-bookmarks.c:299
 g_cclosure_marshal_VOID__UINT (closure=0x96f9220, return_value=0x0, n_param_values=2, param_values=0x94366a0, invocation_hint=0xbf955080, marshal_data=0x0) at /build/buildd/glib2.0-2.31.10/./gobject/gmarshal.c:259