Bugs item #1120452, was opened at 2005-02-10 19:04
Message generated for change (Comment added) made by kbk
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Category: Python Interpreter Core
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Submitted By: Viktor Ferenczi (complex)
Assigned to: Nobody/Anonymous (nobody)
Summary: Python 2.4.0 crashes with a segfault, EXAMPLE ATTACHED
Initial Comment:
Running the attached example crashes python 2.4.0 on linux (segfault) and
Windows. Python is compiled on Debian Linux 3.0r3 (Woody). On Windows XP, I
used the MSI installer downloaded from python.org
This may be a problem with the regular expression module, but I'm not sure.
Please assign a new category if it appears as a regexp bug.
This bug causes permanent crashes in my new WEB applications. Old apps not
using regexp and PyMeld seem to run correctly.
Thanks for 2.4.1.
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>Comment By: Kurt B. Kaiser (kbk)
Date: 2005-02-19 20:56
Message:
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The restart in IDLE will occur if the subprocess is terminated or
segfaults.
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Comment By: Jim Jewett (jimjjewett)
Date: 2005-02-11 14:55
Message:
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__gettattr__ alone can provoke the crash, if used several
times, and on sub-melds.
I can print both StreamURL1 and StreamURL2.
If I ask it for p.StreamURL2.src and p.StreamURL1.value,
it prints whichever one I ask for first, and then crashes on
the second. I did get it to print both (not assign, just
__getattr__) by first getting several other attributes from
p.StreamURL1, including some that didn't exist, so that
there was a raise AttributeError in between. Doing this a
half dozen times, I provoked a MemoryError.
"""
>>> p.StreamURL1.value
'mss://stream.url'
>>> p.StreamURL2.src
Traceback (most recent call last):
File "<pyshell#68>", line 1, in -toplevel-
p.StreamURL2.src
File "C:\Python24\Lib\site-packages\segfault240\PyMeld.
py", line 475, in __getattr__
start = self._findElementFromID(name)
File "C:\Python24\Lib\site-packages\segfault240\PyMeld.
py", line 425, in _findElementFromID
match = _findIDMatch(nodeID, subset)
File "C:\Python24\Lib\site-packages\segfault240\PyMeld.
py", line 282, in _findIDMatch
match = re.search(thisRE, text)
File "C:\Python24\lib\sre.py", line 134, in search
return _compile(pattern, flags).search(string)
MemoryError
>>>
"""
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Comment By: Jim Jewett (jimjjewett)
Date: 2005-02-11 14:36
Message:
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Partially reproduced on Windows XP. (Using the stock 2.4.
0 msi)
Just loading it in IDLE and hitting F5 (run), it prints None,
as though it had succeeded perfectly.
Typing in the commands from index.py by hand, I can get
it to give me the "encountered an error; Tell Microsoft?"
box, but IDLE only restarts instead of actually crashing.
There seems to a problem between the __getattr__ and
the __setattr__ in PyMeld.
"""
>>> p=Meld(open('player.html','rb').read())
>>> p.StreamURL1.value
'mss://stream.url'
>>> p.StreamURL2
<PyMeld.Meld instance at 0x00B455F8>
>>> p.StreamURL2.src
'mms://stream.url'
>>> v=Video()
>>> v.stream
's'
>>> p.StreamURL1.value=v.stream
>>> p.StreamURL1.value
>>> ================================
RESTART
================================
>>>
"""
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Comment By: Michael Hudson (mwh)
Date: 2005-02-11 09:57
Message:
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user_id=6656
What do you do to make it crash? "python index.py"?
It doesn't fail for me with CVS HEAD.
----------------------------------------------------------------------
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