// 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.

/*@testedFeatures=inference*/
library test;

class C<T> extends D<T> {
  /*@topType=() -> C::f::U*/ f<U>(/*@topType=C::f::U*/ x) {}
}

class D<T> {
  F<U> f<U>(U u) => null;
}

typedef V F<V>();

main() {}