- _dbus_warn ("A handler is already registered for the path starting with path[0] = \"%s\"\n",
- path[0] ? path[0] : "null");
+ if (error != NULL)
+ {
+ char *complete_path = flatten_path (path);
+
+ dbus_set_error (error, DBUS_ERROR_OBJECT_PATH_IN_USE,
+ "A handler is already registered for %s",
+ complete_path ? complete_path
+ : "(cannot represent path: out of memory!)");
+
+ dbus_free (complete_path);
+ }
+