pkg/front_end/testcases/extension_types/issue45775.dart

// Copyright (c) 2021, 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 Foo {}

extension Bar on Foo {}

void main() {
  Bar bar = Foo();
}