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[3.10] gh-109638: Fix exponential time in csv.Sniffer for doubled quotes (GH-154868) (GH-155113) - #155116
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…ed quotes (pythonGH-154868) (pythonGH-155113) (cherry picked from commit eaa9bac) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> (cherry picked from commit d52184b)
This was referenced Aug 3, 2026
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After merging, please create a backport of #155166. |
They were added in 3.11. An unrolled loop is unambiguous at every position, so it does not backtrack either. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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The backport of #155166 may be non-trivial (possessive qualifiers only supported since 3.11), so please ping me after merge. |
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…ed quotes (pythonGH-154868) (pythonGH-155113) (python#155116) * [3.13] pythongh-109638: Fix exponential time in csv.Sniffer for doubled quotes (pythonGH-154868) (pythonGH-155113) (cherry picked from commit eaa9bac) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> (cherry picked from commit d52184b) * Match the body of a quoted field without possessive quantifiers They were added in 3.11. An unrolled loop is unambiguous at every position, so it does not backtrack either. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com> Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> (cherry picked from commit 19e5024)
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(cherry picked from commit eaa9bac)
Co-authored-by: Serhiy Storchaka storchaka@gmail.com
(cherry picked from commit d52184b)