Serhiy Storchaka added the comment:
For other related issues see issue18672 and issue18684.
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resolution: - fixed
stage: test needed - committed/rejected
status: open - closed
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Roundup Robot added the comment:
New changeset 86b8b035529b by Serhiy Storchaka in branch '3.3':
Issue #17998: Fix an internal error in regular expression engine.
http://hg.python.org/cpython/rev/86b8b035529b
New changeset 36702442ffe0 by Serhiy Storchaka in branch 'default':
Issue #17998: Fix
Serhiy Storchaka added the comment:
Sorry for the delay. I have committed a simple patch which fixes this bug. But
I don't close the issue still because there are other related issues.
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R. David Murray added the comment:
This appears to have turned the buildbots red.
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nosy: +r.david.murray
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Larry Hastings added the comment:
This broke the test suite on all the 32-bit Linux buildbots. Sample output is
here:
http://buildbot.python.org/all/builders/x86%20Ubuntu%20Shared%203.x/builds/8349/steps/test/logs/stdio
There's no obvious fix, and I want to cut 3.4a1 right about now, so I'm
Serhiy Storchaka added the comment:
See issue18647.
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Changes by Cédric Krier cedric.kr...@b2ck.com:
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nosy: +ced
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Larry Hastings added the comment:
Can I downgrade this to deferred blocker? That means we still need to deal
with it before the release, but we don't have to hold up Python 3.4a1 for it.
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Larry Hastings added the comment:
I'm downgrading this to deferred blocker. I'm sure we'll get it fixed for
Python 3.4 final, but in the meantime there's no sense in holding up Python
3.4a1 for it.
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priority: release blocker - deferred blocker
Larry Hastings added the comment:
There is now a need to rush. I'm hoping to cut the release in about two days,
so we can have Python 3.4a1 on time. Can we resolve this in the next day or
two? Sorry for the short notice.
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Changes by Bohuslav Slavek Kabrda bkab...@redhat.com:
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nosy: +bkabrda
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Changes by Doug Hellmann doug.hellm...@gmail.com:
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nosy: +doughellmann
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Matthias Klose added the comment:
what's the status on this one? Can the proposed patch be applied until the
decision whether to backout the original change, or not?
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nosy: +doko, georg.brandl, larry
priority: normal - release blocker
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Python
Serhiy Storchaka added the comment:
I'm working on tests. No need to rush.
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stage: patch review - test needed
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Changes by Arfrever Frehtes Taifersar Arahesis arfrever@gmail.com:
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nosy: +Arfrever
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Antoine Pitrou added the comment:
Perhaps it would be safer to revert the original commit in bugfix branches, and
just commit the better patch in default?
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nosy: +pitrou
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New submission from Jeroen Demeyer:
On Linux Ubuntu 13.04, i686:
$ uname -a
Linux arando 3.5.0-26-generic #42-Ubuntu SMP Fri Mar 8 23:20:06 UTC 2013 i686
i686 i686 GNU/Linux
$ python
Python 2.7.5 (default, May 17 2013, 18:43:24)
[GCC 4.7.3] on linux2
Type help, copyright, credits or license
Changes by Ezio Melotti ezio.melo...@gmail.com:
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components: +Regular Expressions
nosy: +benjamin.peterson, ezio.melotti, mrabarnett
type: - behavior
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Benjamin Peterson added the comment:
27162465316f
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assignee: - serhiy.storchaka
nosy: +serhiy.storchaka
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Changes by Christian Heimes li...@cheimes.de:
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nosy: +christian.heimes
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Benjamin Peterson added the comment:
Also, note this particular case only reproduces on 32 bit.
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Christian Heimes added the comment:
I'm able to confirm Benjamin's notes. The regexp works on 64bit Linux but fails
with a 32bit build:
$ CFLAGS=-m32 LDFLAGS=-m32 ./configure
$ make -j10
$ ./python -c import re; print(re.compile('(.*)\.[0-9]*\.[0-9]*$',
re.I|re.S).findall('3.0.0'))
Traceback
Matthew Barnett added the comment:
Here are some simpler examples of the bug:
re.compile('.*yz', re.S).findall('xyz')
re.compile('.?yz', re.S).findall('xyz')
re.compile('.+yz', re.S).findall('xyz')
Unfortunately I find it difficult to see what's happening when single-stepping
through the code
Serhiy Storchaka added the comment:
Here is a patch which should fix this bug. I still have to look for similar
bugs and write tests.
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keywords: +patch
stage: - patch review
versions: +Python 3.3, Python 3.4
Added file: http://bugs.python.org/file30299/re_unsigned_ptrdiff.patch
Serhiy Storchaka added the comment:
Thank you Matthew for simpler examples. They helped and I'll use them in the
tests.
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