// 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.
/// @author iefremov


const m = !1;
//         ^
// [analyzer] unspecified
// [cfe] unspecified

main() {
  try {
    print(m);
  } catch (x) {}
}