js/src/tests/test262/language/literals/regexp/u-invalid-optional-negative-lookahead.js


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// |reftest| error:SyntaxError
// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-regular-expressions-patterns
es6id: B.1.4
description: Quantifiable assertions disallowed with `u` flag
info: |
    The `u` flag precludes quantifiable assertions (even when Annex B is
    honored)

    Term[U] ::
         [~U] QuantifiableAssertion Quantifier
negative:
  phase: parse
  type: SyntaxError
---*/

$DONOTEVALUATE();

/.(?!.)?/u;