[Dart article] Async code exceptions 4

dart_async_axceptions4.dart

await Future.delayed(Duration(seconds: 1), () {
    print('Its ok so far');
  }).then((value) {
    final _ = 100 ~/ 0;
  }).catchError((error) {
    print('Cant divide to zero');
  }).whenComplete(() {
    print('Clean-up done');
  });