tests/language_2/regress_29405_test.dart

// 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.

class Foo {
  void call(void callback(Foo foo)) {}
}

main() {
  Foo foo = new Foo();
  foo(foo);
}