| // TODO(multitest): This was automatically migrated from a multitest and may | 
 | // contain strange or dead code. | 
 |  | 
 | // @dart = 2.9 | 
 |  | 
 | // Copyright (c) 2018, 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; | 
 |  | 
 | class A { | 
 |   B b; | 
 | } | 
 |  | 
 | class B { | 
 |   C get c => null; | 
 |   void set c(C value) {} | 
 | } | 
 |  | 
 | class C {} | 
 |  | 
 | class D extends C {} | 
 |  | 
 | class E extends C {} | 
 |  | 
 | // Inferred type: A | 
 | var a = new A(); | 
 |  | 
 | // Inferred type: C | 
 | var x = a.b.c; | 
 |  | 
 | // Inferred type: C | 
 | var y = a.b.c ??= new D(); | 
 |  | 
 | test() { | 
 |   // Verify the types of x and y by trying to assign to them. | 
 |  | 
 |  | 
 |  | 
 |   y = new C(); | 
 |  | 
 |  | 
 | } | 
 |  | 
 | main() {} |