App Replay Type Error: "'Null' is not a subtype of type 'String'"

[Swepilot]

Platform

Flutter Mobile

Obfuscation

Disabled

Debug Info

Disabled

Doctor

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• No issues found!

Version

8.10.1

Steps to Reproduce

Run a Flutter app which is configured to use the beta feature App Replay

Expected Result

No TypeError

Actual Result

_TypeError (type 'Null' is not a subtype of type 'String' in type cast) on line

sentry-dart/flutter/lib/src/native/sentry_native_channel.dart

Line 216 in bd75526

}).then((value) => SentryId.fromId(value as String));

Are you willing to submit a PR?

None

[buenaflor]

hi how does your init config look like?

[Swepilot]

hi how does your init config look like?

@buenaflor like this:

 await SentryFlutter.init((options) {
    options.dsn =
        'https://........ingest.sentry.io/.......';

    // Set tracesSampleRate to 1.0 to capture 100% of transactions for performance monitoring.
    // We recommend adjusting this value in production.
    options.tracesSampleRate = 1.0;

    options.experimental.replay.sessionSampleRate = 1.0;
    options.experimental.replay.onErrorSampleRate = 1.0;

  }, appRunner: () => runApp(App()));

[nelsoncampos-cloudwalk]

Same issue here for me

[buenaflor]

does this happen both on iOS and Android?

[nelsoncampos-cloudwalk]

I can confirm that is happing in iOS @buenaflor

[buenaflor]

I believe this issue has something to do with hot-restart, I can't reproduce it when I cold start an app but as soon as I hot-restart then the error starts popping up (which indicates the replayId is null)

@vaind maybe you know more here

[vaind]

The issue, as mentioned by @buenaflor, happens during development when flutter does a "hot-restart". This causes our native iOS SDK (sentry-cocoa) integration to restart as well but the native replay integration doesn't restart. We'll need to make adjustments either in our calls to the native SDK or in the native SDK itself (TBD). I'll keep this issue updated when fixes are in place.

[nelsoncampos-cloudwalk]

@vaind @buenaflor Hi there! Do you have an estimated timeline for when this fix might be completed? We're really eager to start using the Sentry Replays features.

[buenaflor]

@nelsoncampos-cloudwalk we're working in a fix