// Copyright (c) 2011, 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 A constant expression is an expression whose value can never
 * change, and that can be evaluated entirely at compile time.
 * A constant expression is one of the following:
 * . . .
 * • An expression of one of the forms !e, e1 && e2 or e1 || e2, where e, e1
 *   and e2 are constant expressions that evaluate to a boolean value.
 * @description Checks that an expression of the form !e cannot be used to
 * initialize a constant variable if e does not evaluate to a boolean value.
 * @compile-error
 * @author iefremov
 */

const m = !1;

main() {
  try {
    print(m);
  } catch (x) {}
}