pkg/front_end/testcases/general/check_deferred_is_check.dart

// Copyright (c) 2018, 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.md file.
// @dart=2.9
import 'deferred_lib.dart' deferred as lib;

main() {}
test(x) {
  print(x is lib.C);
}