pkg/front_end/testcases/late_lowering/infer_late_field_type.dart

// 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.

class A {
  int? field;
}

class B implements A {
  late var field;
}

main() {}