pkg/front_end/testcases/inference_new/field_inference_circularity.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;

// A.x depends on B.x which depends on A.x, so no type is inferred.  But types
// can be inferred for A.y and B.y.

class A {
  var x = /*@returnType=invalid-type*/ () => new B(). /*@target=B.x*/ x;
  var y = /*@returnType=invalid-type*/ () => new B(). /*@target=B.x*/ x;
}

class B extends A {
  var x;
  var y;
}

main() {}