pkg/front_end/testcases/inference/circular_reference_via_closures.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.
// @dart=2.9
/*@testedFeatures=inference*/
library test;

var x = /*@ returnType=() ->* invalid-type */ () => y;
var y = /*@ returnType=invalid-type */ () => x;

main() {}