Stream issue with StreamProvider

[mpastewski]

Describe the bug I'm using StreamBuilder to listen to changes in user authentication and then StreamProvider to fetch data from Firestore while constantly listening to changes in user documents. I sometimes got occasional crashes for a small percentage of users, but lately, this number has risen.

This is the crash from Crashlytics: Fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: An exception was throw by _MapStream<DocumentSnapshot<Map<String, dynamic>>, UserData> listened by at FirebaseCrashlytics.recordError(firebase_crashlytics.dart:119) at FirebaseCrashlytics.recordFlutterError(firebase_crashlytics.dart:145) at FlutterError.reportError(assertions.dart:1185) at _streamStartListening.<fn>.<fn>(async_provider.dart:32)

To Reproduce ` runApp(

StreamBuilder<User?>(
  stream: FirebaseAuth.instance.authStateChanges(),
  builder: (context, snapshot) {
    return StreamProvider<UserData>.value(
        value: getUserData(snapshot.data?.uid),
        initialData: UserData(),
        child: Phoenix(child: MyApp(snapshot)));
  },
),

);

` Stream getUserData(String? uid) { if (uid != null) {

return FirebaseFirestore.instance
    .collection('users')
    .doc(uid)
    .snapshots()
    .map((doc) {
  final data = doc.data();
  if (data != null) {
    return UserData.fromJson(data);
  } else {
    return UserData();
  }
});

} return Stream.value(UserData()); }`

Expected behavior I want to use:

final data = Provider.of<UserData>(context, listen: false);

In the entire app get the newest version of UserData while still being sure that the user is authenticated.

[rrousselGit]

How is this related to Provider? To me it sounds like your stream is emitting an exception. Provider isn't responsible for this

[mpastewski]

Thanks Remi for this hint that I should seek more on the Stream side and sorry for opening this issue in Provider. How would you troubleshoot it from there?

[rrousselGit]

I don't think there's a clear way for me to help. But I'd suggest asking on forums, like Discord