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Issue #24580: Symbolic group references to open group in re patterns now are

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explicitly forbidden as well as numeric group references.
This commit is contained in:
Serhiy Storchaka 2015-07-18 23:27:00 +03:00
parent 2489bd5d4e
commit 485407ce1e
3 changed files with 8 additions and 0 deletions
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2
Lib/test/test_re.py
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@ -224,6 +224,8 @@ class ReTests(unittest.TestCase):
self.checkPatternError('(?P<a>)(?P<a>)',
"redefinition of group name 'a' as group 2; "
"was group 1")
self.checkPatternError('(?P<a>(?P=a))',
"cannot refer to an open group", 10)
self.checkPatternError('(?Pxy)', 'unknown extension ?Px')
self.checkPatternError('(?P<a>)(?P=a', 'missing ), unterminated name', 11)
self.checkPatternError('(?P=', 'missing group name', 4)