[Python-bugs-list] [ python-Bugs-477728 ] .*? matches newlines without DOTALL

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Bugs item #477728, was opened at 2001-11-02 22:04
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Category: Regular Expressions
Group: Python 2.2
Status: Open
Resolution: None
Priority: 7
Submitted By: Tim Peters (tim_one)
Assigned to: Fredrik Lundh (effbot)
Summary: .*? matches newlines without DOTALL

Initial Comment:
ython 2.2b1+ (#25, Oct 30 2001, 22:36:33) [MSC 32 bit 
(Intel)] on win32
>> text = "one\ntwo\nthree\n"
>> import re
>> re.match(r'.*?$', text)
SRE_Match object at 0x007AD940>
>> _.group(0)  # oops!
one\ntwo\nthree'
>> re.match(r'.*$', text) # more like it
>>

Since . shouldn't match a newline in the absence of 
re.DOTALL, .*? shouldn't match any newlines, and then 
minimal match should have failed (as did the maximal 
match).  Found by Bruce Eckel.

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>Comment By: Fredrik Lundh (effbot)
Date: 2001-12-06 14:07

Message:
Logged In: YES 
user_id=38376

A quick fix (which I originally planned to check in
tonight) would be to back out of a recent patch that
attempts to avoid recursion in some cases.  But after
a careful code review, I'm beginning to think that I
might be able to tweak the patch into something that
works also in this case.

But I better do that some night when I haven't been
out celebrating the PythonWorks 1.3 release...

(tomorrow, in other words)

</F>

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Comment By: Tim Peters (tim_one)
Date: 2001-12-02 12:28

Message:
Logged In: YES 
user_id=31435

Boosted priority:  /F, what's the hangup here?

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Comment By: Tim Peters (tim_one)
Date: 2001-12-02 12:27

Message:
Logged In: YES 
user_id=31435

Boosted priority:  /F, what's the hangup here?

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