pkg/front_end/testcases/nnbd/issue44276.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.

void main() {
  fun();
}

class Base {
  int? value1;
  int? value2;
}

int? fun() {
  Base? a;
  final b = a?.value1 ?? a?.value2;
  return b;
}