Minimal Example to Reproduce Catcher/flutter_bloc issue

catcher_flutter_bloc_issue_main.dart

// dependencies:
//   ...
//   catcher: ^0.2.7
//   flutter_bloc: ^2.1.1

import 'package:catcher/catcher_plugin.dart';
import 'package:catcher/core/catcher.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:bloc/bloc.dart';
import 'package:flutter_bloc/flutter_bloc.dart';

void main() => Catcher(
  MyApp(),
  debugConfig: CatcherOptions(
    PageReportMode(),
    [ConsoleHandler()]
  )
);

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      navigatorKey: Catcher.navigatorKey,
      title: 'Flutter Demo',
      home: BlocBuilder<MyBloc, BlocState>(
        bloc: MyBloc(),
        builder: (BuildContext context, BlocState state) {
          throw Exception();
        },
      ),
    );
  }
}

abstract class BlocEvent {}

abstract class BlocState {}
class BlocInitState implements BlocState {}

class MyBloc extends Bloc<BlocEvent, BlocState> {
  @override
  BlocState get initialState => BlocInitState();

  @override
  Stream<BlocState> mapEventToState(BlocEvent event) {
    return null;
  }
}