pkg/front_end/testcases/regress/issue_31192.dart

// Copyright (c) 2017, 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 Increment {
  late int x;
  Increment() : x++ {}
}

main() {}