// 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;

List<T> f<T>(T g()) => <T>[g()];
var /*@topType=dynamic*/ v =
    (f)<int>(/*info:INFERRED_TYPE_CLOSURE*/ /*@returnType=int*/ () {
  return 1;
});

main() {
  v;
}
