Can't seem to map a stream with async* for some reason

main.dart

void main() async {
  final test = TestClass();

  print(await test.mapIsOdd.first);
  print(await test.asyncStarIsOdd.first);
}

Stream<int> get stream => Stream.fromIterable([1, 2, 3, 4, 5, 6]);

class TestClass {
  /// This works as expected
  Stream<bool> get mapIsOdd {
    return stream.map((e) {
      return e.isOdd;
    });
  }

  /// This appears to fail but I'm not sure why
  Stream<bool> get asyncStarIsOdd async* {
    await for (var e in stream) {
      yield e.isOdd;
    }
  }
}