Issue541883
Created on 2002年04月10日 06:51 by vfiack, last changed 2022年04月10日 16:05 by admin. This issue is now closed.
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| File name |
Uploaded |
Description |
Edit |
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delattr-patch
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nnorwitz,
2002年04月15日 00:55
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patch to fix crash |
| Messages (5) |
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msg10238 - (view) |
Author: Vincent FIACK (vfiack) |
Date: 2002年04月10日 06:51 |
delattr() causes python to segfault with builtins types
First a normal case to see what it should do :
Python 2.2.1c2 (#1, Apr 3 2002, 14:02:46)
[GCC 2.95.4 20011002 (Debian prerelease)] on linux2
Type "help", "copyright", "credits" or "license" for
more information.
>>> a = 5
>>> delattr(a, "__class__")
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: 'int' object has only read-only attributes
(del .__class__)
Then the faulty case :
Python 2.2.1c2 (#1, Apr 3 2002, 14:02:46)
[GCC 2.95.4 20011002 (Debian prerelease)] on linux2
Type "help", "copyright", "credits" or "license" for
more information.
>>> a = 5
>>> a.__class__
<type 'int'>
>>> delattr(a, "__class__")
Segmentation fault.
I don't know why, but if i access to a.__class__
before deleting it, it cause this error. The same
occurs if i use another base type such as a string or
a list. I haven't tried other attributes than
__class__, but it may worth trying.
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msg10239 - (view) |
Author: Vincent FIACK (vfiack) |
Date: 2002年04月10日 07:25 |
Logged In: YES
user_id=34036
I tried on "Python 2.2 (#28, Dec 21 2001, 12:21:22) [MSC 32
bit (Intel)] on win32" and a similar error occurs.
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msg10240 - (view) |
Author: Michael Hudson (mwh) (Python committer) |
Date: 2002年04月10日 10:06 |
Logged In: YES
user_id=6656
Confirmed in 2.2.1.
Arse.
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msg10241 - (view) |
Author: Neal Norwitz (nnorwitz) * (Python committer) |
Date: 2002年04月15日 00:55 |
Logged In: YES
user_id=33168
Attached is a patch which fixes the problem,
not sure if this is appropriate or not.
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msg10242 - (view) |
Author: Guido van Rossum (gvanrossum) * (Python committer) |
Date: 2002年04月15日 01:04 |
Logged In: YES
user_id=6380
Thanks! I fixed it pretty much the way Neal suggested; the
test I checked in is slightly different. Definitely a bugfix
candidate.
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History
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| Date |
User |
Action |
Args |
| 2022年04月10日 16:05:12 | admin | set | github: 36405 |
| 2002年04月10日 06:51:38 | vfiack | create |