// Copyright (c) 2019, 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 a compile error if an instance method m1 overrides an
/// instance member m2 and the type of m1 is not a subtype of the type of m2.
/// @description Checks that a compile error is produced when the type of the
/// overriding method is not a subtype of the method being overridden even if 
/// the class declaring m1 is not a direct subtype of the class declaring m2.
/// @author sgrekhov@unipro.ru

class A {
  foo(double? name) {}
}
typedef AAlias = A;
class A1 extends A{}
typedef A1Alias = A1;
class A2 extends A1{}
typedef A2Alias = A2;
class A3 extends A2{}
typedef A3Alias = A3;
class C extends A3Alias {
  foo(int? name) {}
//^
// [analyzer] unspecified
// [cfe] unspecified
}

main() {
  new A().foo(1.0);
  new C().foo(0);
}