Patch for sre bug 610299

[glchapman]

BPO	633359
Nosy	@gvanrossum, @loewis
Files	patch.txt

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/gvanrossum'
closed_at = <Date 2003-02-24.01:32:23.000>
created_at = <Date 2002-11-04.16:48:09.000>
labels = ['library']
title = 'Patch for sre bug 610299'
updated_at = <Date 2003-02-24.01:32:23.000>
user = 'https://bugs.python.org/glchapman'

bugs.python.org fields:

activity = <Date 2003-02-24.01:32:23.000>
actor = 'gvanrossum'
assignee = 'gvanrossum'
closed = True
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2002-11-04.16:48:09.000>
creator = 'glchapman'
dependencies = []
files = ['4677']
hgrepos = []
issue_num = 633359
keywords = ['patch']
message_count = 6.0
messages = ['41546', '41547', '41548', '41549', '41550', '41551']
nosy_count = 3.0
nosy_names = ['gvanrossum', 'loewis', 'glchapman']
pr_nums = []
priority = 'high'
resolution = 'accepted'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue633359'
versions = ['Python 2.2']

[glchapman]

Bug report 610299 points out this discrepancy:

>>> re.compile(r'\w{1}', re.U).sub('X', u'hello caf\xe9') 
u'XXXXX XXXX' 
>>> re.compile(r'\w', re.U).sub('X', u'hello caf\xe9') 
u'XXXXX XXX\xe9' 

The problem is in sre_compile.py: the call to
_compile_charset near the end of _compile_info forgets to
pass in the flags, so that the info charset is not compiled
with re.U. (The info charset is used when searching to find
the first character at which a match could start; it is not
generated for patterns beginning with a repeat like '\w{1}'.)

The attached patch changes this call to pass in the flags; it
is against the 2.2.2 version of sre_compile.py.

[loewis]

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There's no uploaded file! You have to check the
checkbox labeled "Check to Upload & Attach File"
when you upload a file.

Please try again.

(This is a SourceForge annoyance that we can do
nothing about. :-( )

[glchapman]

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Sorry, I though I marked the checkbox (I know I went throught
the browse button to find the file). Anyway, here's the file.

[gvanrossum]

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Grabbing this since effbot seems unresponsive.

[gvanrossum]

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Thanks!

Fixed in 2.3. Keeping open for fixing in 2.2.3.

[gvanrossum]

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Backport checked in.