Fix catastrophic regex backtracking in NotAlphanumParagraphV1 tagger#278
Open
Chessing234 wants to merge 1 commit into
Open
Fix catastrophic regex backtracking in NotAlphanumParagraphV1 tagger#278Chessing234 wants to merge 1 commit into
Chessing234 wants to merge 1 commit into
Conversation
Remove redundant `+` quantifier from the emoji character class in the regex pattern. The outer `()+` group already handles repetition, so the inner `]+` creates nested quantifiers that cause exponential backtracking on long emoji sequences. Fixes allenai#123 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
+quantifier from the emoji character class inNotAlphanumParagraphV1's regex pattern (python/dolma/taggers/punctuation.py)[...]+()+$has nested quantifiers that cause exponential backtracking on long emoji sequences; the outer()+already handles repetition, making the inner+both redundant and harmfulFixes #123
Test plan
🤖 Generated with Claude Code