New submission from Gabriel Rodríguez Alberich:
>>> import re
>>> re.compile("(?P<>)")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python2.7/re.py", line 190, in compile
return _compile(pattern, flags)
File "/usr/lib/python2.7/re.py", line 240, in _compile
p = sre_compile.compile(pattern, flags)
File "/usr/lib/python2.7/sre_compile.py", line 500, in compile
p = sre_parse.parse(p, flags)
File "/usr/lib/python2.7/sre_parse.py", line 673, in parse
p = _parse_sub(source, pattern, 0)
File "/usr/lib/python2.7/sre_parse.py", line 308, in _parse_sub
itemsappend(_parse(source, state))
File "/usr/lib/python2.7/sre_parse.py", line 544, in _parse
if not isname(name):
File "/usr/lib/python2.7/sre_parse.py", line 218, in isname
if not isident(name[0]):
IndexError: string index out of range
isname() shouldn't be blindly accessing name[0].
----------
components: Regular Expressions
messages: 176664
nosy: Gabriel.Rodríguez.Alberich, ezio.melotti, mrabarnett
priority: normal
severity: normal
status: open
title: Regular expressions with empty named groups breaks isname check
type: crash
versions: Python 2.7, Python 3.2
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue16578>
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