Dart Async Throw and Rethrow

throw_rethrow.dart

Future<void> doAThing() async {
  await Future.delayed(Duration(milliseconds: 500));

  try {
    print('Trying a dangerous thing...');
    await doADangerousThing();
  } catch (e) {
    print('There was a minor error: $e');
    rethrow;
  }
}

Future<void> doADangerousThing() async {
  await Future.delayed(Duration(milliseconds: 500));
  print('here comes trouble...');
  try {
    throw ArgumentError('I want to argue!');
  } catch (e) {
    print('There was an error: $e');
    rethrow;
  }
}

Future<void> main() async {
  print('Let us begin...');

  try {
    print('Trying a thing...');
    await doAThing();
  } catch (e) {
    print('Something bad happened: $e');
  }
}