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Track lookaheads whilst matching to rule out false positives #426

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tjenkinson opened this issue Oct 8, 2023 · 0 comments
Open

Track lookaheads whilst matching to rule out false positives #426

tjenkinson opened this issue Oct 8, 2023 · 0 comments
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enhancement New feature or request

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@tjenkinson
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(a?)(?:(?!a)[^])+\1 is a false positive.

(a?)[^a]+\1 which is equivalent is properly detectes as ReDoS-free.

If we tracked the lookahead along with what it was matching we could rule this out.

See #87 (comment)
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