[Dart article] Async code exceptions 8

dart_async_axceptions8.dart

try {
    Timer.run(() {
      print('Timer runs.');
      throw Exception('[Timer] Bad thing happens!');
    });
    print('Everything is fine!');
  } on IntegerDivisionByZeroException {
    print('Cant divide to zero');
  } finally {
    print('Clean-up done');
  }