pkg/front_end/testcases/inference/bug31132.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;

class B {}

class C extends B {
  var z;
}

void test(B x) {
  var /*@ type=C* */ y = x is C ? /*@ promotedType=C* */ x : new C();
  print(y. /*@target=C.z*/ z);
}

main() {}