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gh-140797: Forbid capturing groups in re.Scanner lexicon patterns #140944

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Merged
serhiy-storchaka merged 4 commits into from
Nov 4, 2025
Merged

gh-140797: Forbid capturing groups in re.Scanner lexicon patterns #140944

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29db6ca
This PR references issue gh-140797
Abhi210 Nov 3, 2025
feaee4e
gh-140797 forbid capturing groups in re.Scanner lexicon patterns- Rev-7
Abhi210 Nov 4, 2025
d1d582e
Update Lib/test/test_re.py
Abhi210 Nov 4, 2025
f4f7d4d
Update Lib/test/test_re.py
Abhi210 Nov 4, 2025
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Update Lib/test/test_re.py 
Co-authored-by: Serhiy Storchaka <[email protected]>
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@Abhi210 @serhiy-storchaka
Abhi210 and serhiy-storchaka authored Nov 4, 2025
commit f4f7d4db1f245d8a7574a1fbfa94af8e6392d543
2 changes: 1 addition & 1 deletion Lib/test/test_re.py
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Expand Up @@ -1642,7 +1642,7 @@ def s_int(scanner, token): return int(token)
def test_bug_gh140797(self):
# gh140797: Capturing groups are not allowed in re.Scanner

msg = "Cannot use capturing groups in re.Scanner"
msg = r"Cannot use capturing groups in re\.Scanner"
# Capturing group throws an error
with self.assertRaisesRegex(ValueError, msg):
Scanner([("(a)b", None)])
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