| // Copyright (c) 2020, 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. |
| |
| /** |
| * @assertion The definitions of least and greatest closure are changed in null |
| * safe libraries to substitute [Never] in positions where previously [Null |
| * would have been substituted, and [Object?] in positions where previously |
| * [Object] or [dynamic] would have been substituted. |
| * @description Check the [class C<X extends C<X>>] case: it is not true that |
| * [Object?] <: [C<Object?>], and this means that the inferred type does not |
| * satisfy the declared bound. A generic function invocation cannot be |
| * super-bounded, so the choice must be rejected. So, compiler error should be |
| * thrown for [f<X>(C<X> Function() g) => g()]. |
| * @note Read more about the least and greatest closure test template: |
| * https://github.com/dart-lang/co19/issues/575#issuecomment-613542349 |
| * |
| * @Issue 44092, 44073 |
| * @author iarkh@unipro.ru |
| */ |
| |
| abstract class C<X extends C<X>> {} |
| |
| void main() { |
| void f<X>(C<X> Function() g) => g(); |
| // ^ |
| // [analyzer] unspecified |
| // [cfe] unspecified |
| } |
