pkg/front_end/testcases/extensions/issue44844.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.
// @dart=2.9
extension on int {
  static int foo = 2;
  void foo() {}
}

void test() {
  3.foo();
}

main() {}