| // Copyright (c) 2019, 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 | |
| class D<X extends void Function()> { | |
| factory D.foo() => new D._(); | |
| D._() {} | |
| } | |
| main() { | |
| print(new D.foo()); | |
| } |