| // Copyright (c) 2023, 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. | |
| class A<X> { | |
| final X x; | |
| A(this.x); | |
| } | |
| extension<X> on A<X> { | |
| X get g => x; | |
| } | |
| void foo<X>(A<X> it) { | |
| switch (it) { | |
| case A<X>(g: var x): | |
| x.arglebargle; // Error | |
| } | |
| } |