Crash Timeline.applyPlugins package:segment_analytics/timeline.dart:104

[awaisjamil-mp]

Concurrent modification during iteration: Instance(length:6) of '_GrowableList'.
Concurrent modification during iteration: Instance(length:6) of '_GrowableList'.
0 ListIterator.moveNext dart:_internal/iterable.dart:348
1 Timeline.applyPlugins package:segment_analytics/timeline.dart:104
2 Timeline.process package:segment_analytics/timeline.dart:91
3 Analytics._process package:segment_analytics/analytics.dart:385
4 Analytics.track package:segment_analytics/analytics.dart:215

[JulianP911]

We are currently experiencing the same error which is generating a number of important issues to users who have the application with the package, we are waiting for your help.

[awaisjamil-mp]

any update???

[neelkanth-kaushik]

Hi @awaisjamil-mp @JulianP911 ,

We attempted to reproduce the issue by integrating a single plugin, but no errors were encountered during the process. To assist further, could you provide more context—such as the specific plugin(s) used, configuration details, and exact steps to reproduce the error?

This information will help us investigate the issue more effectively.

Thanks.

[awaisjamil-mp]

We are using 4 plugins on app startup we add plugins and on the very first event segment throws this error.

Facebook, tiktok, adjust and GoogleAnalytics plugin all of these are custom Destination Plugin that I have created.

[awaisjamil-mp]

here is the number of impacted user on our app

[neelkanth-kaushik]

Hi @awaisjamil-mp , while we investigate the root cause, can you please make the following change in analytics_flutter/packages/core/lib/timeline.dart and let us know if it fixes your error?

[awaisjamil-mp]

do you want me to fork it?

[neelkanth-kaushik]

@awaisjamil-mp To test whether the proposed change resolves your issue, I recommend temporarily modifying the file located at /username/.pub-cache/hosted/pub.dev/segment_analytics-1.1.3/lib/timeline.dart, or the equivalent path in your environment where the dependencies are downloaded after running flutter pub get.

If the patch works as expected, you’re welcome to proceed with your own preferred solution or wait for the official release. In either case, please leave a comment here to confirm whether the modification resolved the issue on your end—it would be greatly appreciated.

[awaisjamil-mp]

Yes it seems to work. What will be ETA for this release? a hotfix maybe?