我曾经运行过Firebase Cloud Functions。但是在重构了我的整个代码库以使其听起来空安全之后，云函数停止了工作（可悲的是，我无法在时间轴的哪个点重现）。
pubspec.yaml

dependencies:
      flutter:
        sdk: flutter
      firebase_core: ^1.0.2
      firebase_auth: ^1.0.1
      cloud_firestore: ^1.0.4
      cloud_functions: ^1.1.0
      ...

web/index.html

...
  <script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-app.js"></script>
  <script src="https://www.gstatic.com/firebasejs/8.6.1/firebase-functions.js"></script>
  <script src="https://www.gstatic.com/firebasejs/7.19.1/firebase-auth.js"></script>
  <script src="https://www.gstatic.com/firebasejs/7.19.1/firebase-firestore.js"></script>
    
  <script>
    // Your web app's Firebase configuration
    var firebaseConfig = {
      apiKey: "<myApiKey>",
      authDomain: "<my-project>.firebaseapp.com",
      databaseURL: "https://<my-project>.firebaseio.com",
      projectId: "<my-project>",
      storageBucket: "<my-project>.appspot.com",
      messagingSenderId: "<myMessageSenderId>",
      appId: "<myAppId>"
    };
    // Initialize Firebase
    firebase.initializeApp(firebaseConfig);
    firebase.functions().useFunctionsEmulator("http://10.0.2.2:5001");
  </script>
  
  <script src="main.dart.js" type="application/javascript"></script>
</body>
</html>

functions/index.js

const functions = require('firebase-functions');
const admin = require('firebase-admin');
const { UserPropertyValue } = require('firebase-functions/lib/providers/analytics');
admin.initializeApp();

exports.setRoles = functions.https.onCall((data, context) => {
    let userId = null;
    let userCustomClaimsAdmin = false;
    let userCustomClaimsEditor = false;

    // get user and update custom claim
    return admin.auth().getUserByEmail(data.email).then(user => {

        userId = user.uid;
        const currentCustomClaims = (user.customClaims == undefined) ? {} : user.customClaims;
        switch (data.role) {
            case 'admin':
                currentCustomClaims.admin = (data.permission == 'grant') ? true : false;
            break;
            case 'editor':
                currentCustomClaims.editor = (data.permission == 'grant') ? true : false;
            break;
            default:
                return;
        }

        userCustomClaimsAdmin = currentCustomClaims.admin;
        userCustomClaimsEditor = currentCustomClaims.editor;

        return admin.auth().setCustomUserClaims(userId,
            currentCustomClaims
        );
        }).then(() => {
            // Update User record in Firestore
            return admin.firestore().collection("users").doc(userId).update({
                isAdmin: userCustomClaimsAdmin,
                isEditor: userCustomClaimsEditor,
            });
        }).then(() => {
            return {
                message: 'Success'
            }
        })
        .catch(err => {
            console.log(err.toString());
        });
});

最后，我调用函数：

...
   final HttpsCallable setRoleCallable = FirebaseFunctions.instance
        .httpsCallable('setRoles',
            options:
                HttpsCallableOptions(timeout: const Duration(seconds: 10)));
...
              try {
                final HttpsCallableResult result = await setRoleCallable.call(
                  <String, dynamic>{
                    'email': "<emailOfUserToBeChanged>",
                    'role': "<selectedRole>",
                    'permission': "<givenAccess>"
                  },
                );
                print(result.data);
              } on FirebaseFunctionsException catch (e) {
                print('caught firebase functions exception');
                print(e.code);
                print(e.message);
                print(e.details);
              } catch (e) {
                print('caught generic exception');
                print(e);
              }

该调用（本地主机上的仿真函数，10.0.2.2）结束于

caught firebase functions exception
internal
internal
null

在这段时间里，有什么我错过的改变吗？我在Firebase文档中找不到任何关于此主题的内容。
也许这可能是一个小的变化，在某个时候，我还没有认识到..