test/language/literals/regexp/u-invalid-optional-negative-lookbehind.js


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// Copyright (C) 2018 Igalia S. L. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-regular-expressions-patterns
description: Lookbehinds are not treated as a QuantifiableAssertion
info: |
    Term[U] ::
         [~U] QuantifiableAssertion Quantifier

    QuantifiableAssertion[N]::
        ( ? = Disjunction[~U, ?N] )
        ( ? ! Disjunction[~U, ?N] )
negative:
  phase: parse
  type: SyntaxError
---*/

throw "Test262: This statement should not be evaluated.";

/.(?<!.)?/u;