tests/language/nnbd/type_promotion/do_condition_is_type_test.dart

// Copyright (c) 2019, 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.

// SharedOptions=--enable-experiment=non-nullable

void f(Object x) {
  do {
    x.length; //# 01: compile-time error
  } while (x is String);
  x.length; //# 02: compile-time error
}

void main() {}