[issue34294] re.finditer and lookahead bug

[Karthikeyan Singaravelan]

Karthikeyan Singaravelan <tir.karthi at gmail.com> added the comment:

➜  cpython git:(70d56fb525) ✗ ./python.exe
Python 3.7.0a2+ (tags/v3.7.0a2-341-g70d56fb525:70d56fb525, Jul 31 2018, 21:58:10)
[Clang 7.0.2 (clang-700.1.81)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>
➜  cpython git:(70d56fb525) ✗ ./python.exe -c 'import re; print([m.groupdict() for m in re.finditer(r"(?=<(?P<tag>\w+)/?>(?:(?P<text>.+?)</(?P=tag)>)?)", "<test><foo2/></test>")])'
[{'tag': 'test', 'text': '<foo2/>'}, {'tag': 'foo2', 'text': '<foo2/>'}]


➜  cpython git:(e69fbb6a56) ✗ ./python.exe
Python 3.7.0a2+ (tags/v3.7.0a2-340-ge69fbb6a56:e69fbb6a56, Jul 31 2018, 22:12:06)
[Clang 7.0.2 (clang-700.1.81)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>
➜  cpython git:(e69fbb6a56) ✗ ./python.exe -c 'import re; print([m.groupdict() for m in re.finditer(r"(?=<(?P<tag>\w+)/?>(?:(?P<text>.+?)</(?P=tag)>)?)", "<test><foo2/></test>")])'
[{'tag': 'test', 'text': '<foo2/>'}, {'tag': 'foo2', 'text': None}]

Does this have something to do with 70d56fb52582d9d3f7c00860d6e90570c6259371(bpo-25054, bpo-1647489) ?


Thanks

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34294>
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