'closure_1 as closure_2' problem

readme.md

'closure_1 as closure_2' problem

Created with <3 with dartpad.dev.

main.dart

import 'dart:isolate';

void main() async {
  final toMainIsolate = ReceivePort();
  final stream = toMainIsolate.asBroadcastStream();

  // Isolate
  final isolate = await Isolate.spawn(isolateWorker, toMainIsolate.sendPort);

  final SendPort sendPort = await stream.first;

  sendPort.send((TargetAction action) => action.handleAction());
}

class SomeReceiver {
  final TargetAction targetAction = TargetAction();

  void receiveAction(void Function(Object) handleAction) => handleAction(targetAction);
}

class TargetAction {
  void handleAction() => print('HOORAY');
}

void isolateWorker(SendPort toMainIsolate) async {
  final fromMainIsolate = ReceivePort();
  final stream = fromMainIsolate.asBroadcastStream();
  toMainIsolate.send(fromMainIsolate.sendPort);

  final receiver = SomeReceiver();

  final action = await stream.first;

  receiver.receiveAction(action);
}