LanguageFeatures/nnbd/static_errors_A17_t02.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.

/// @assertion It is not an error to call or tear-off a method, setter, or
/// getter, or to read or write a field, on a receiver of static type Never.
/// Implementations that provide feedback about dead or unreachable code are
/// encouraged to indicate that any arguments to the invocation are unreachable.
///
/// @description Check that it is an error to call a method, setter, or getter on
/// a receiver of static type Never. Test type aliases
/// @author sgrekhov@unipro.ru
/// @issue 39866

// Requirements=nnbd-strong
typedef Neverland = Never;

void test(var x) {
  if (x is Neverland) {
    x.toString();
    x.runtimeType;
    x.s = 1;
  }
}

main() {
  test(null);
}