// Copyright (c) 2017, 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.

// @dart=2.6

class A {}

class B extends A {}

class C {
  void set x(A value) {}
  B get y => null;
}

class D extends C {
  void set x(value) {} // Inferred type: A
  get y => null; // Inferred type: B
}

class E extends D {
  void set x(A value) {} // Ok
  B get y => null; // Ok
}

class F extends D {
  void set x(B value) {}
  A get y => null;
}

main() {}