// Copyright (c) 2020, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/// @assertion It is an error if a mixin declaration or a class declaration with
/// no generative constructors declares an instance variable with a potentially
/// non-nullable type and no initializer expression unless the variable is marked
/// with the late modifier.
///
/// @description Check that it is an error if a class declaration with no
/// generative constructors declares an instance variable with a potentially
/// non-nullable type and no initializer expression. Test
/// FutureOr<FutureOr<A>> where A is some class
/// @author sgrekhov@unipro.ru
/// @issue 40677
/// @issue 40940


import "dart:async";

class A {}

class C {
  FutureOr<FutureOr<A>> f;
//                      ^
// [analyzer] unspecified
// [cfe] unspecified
  factory C.f() = D;
}

class D implements C {
  FutureOr<FutureOr<A>> f = new A();

  D();
}

main() {
  new C.f();
}