How to use handler.reject in onError of QueuedInterceptor

[jackie-weiwei]

Request Statement

flutter version: 3.10.4
dio version : 5.4.0

When I call handler.reject(DioException(requestOptions: options)) in onError, The caller displays the following error：

Exception has occurred.
DioException (DioException [unknown]: null)

I don't understand now why the caller reports an error after rejecting. How should I use reject? Please help. Thank you.
my code like this:

Response res = await RestApi.post(
    path: "/test/test", data: {"mobile": "1000000000"});
if (res == null) {
  print("请求失败");
}

interceptor code like this:

    _dio.interceptors.add(QueuedInterceptorsWrapper(
      onRequest: (options, handler) async {
        options.headers["access"] = _token;
        return handler.next(options); //continue
      },
      onResponse: (response, handler) {
        String path = response.requestOptions.path;
        if (path.contains("login")) {
          _token = response.data["accessToken"];
          _token2 = response.data["refreshToken"];
        }
        debugPrint(path);
        return handler.next(response); // continue
      },
      onError: (error, handler) async {
        if (error.response?.statusCode == 401) {
          final options = error.response!.requestOptions;
          bool bSucc = await refreshToken();

          if (bSucc) {
            var res = await _dio.fetch(error.response!.requestOptions);
            handler.resolve(res); //continue
          } else {
            handler.reject(DioException(requestOptions: options));
          }
        } else {
          handler.next(error);
        }
      },
    ));

Solution Brainstorm

No response

[AlexV525]

Please use discussions for general issues.