[ python-Bugs-1497962 ] Leak in tarfile.py

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Bugs item #1497962, was opened at 2006-05-31 08:42
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Jens Jørgen Mortensen (jensj)
Assigned to: Nobody/Anonymous (nobody)
Summary: Leak in tarfile.py

Initial Comment:
There is a leak when using the tarfile module and the
extractfile method.  Here is a simple example:
 
$ echo "grrr" > x.txt
$ tar cf x.tar x.txt
$ python
Python 2.4.2 (#2, Sep 30 2005, 21:19:01)
[GCC 4.0.2 20050808 (prerelease) (Ubuntu
4.0.1-4ubuntu8)] on linux2
Type "help", "copyright", "credits" or "license" for
more information.
>>> import gc
>>> import tarfile
>>> tar = tarfile.open('x.tar', 'r')
>>> f = tar.extractfile('x.txt')
>>> f.read()
'grrr\n'
>>> del f
>>> gc.set_debug(gc.DEBUG_LEAK)
>>> print gc.collect()
gc: collectable <ExFileObject 0xb73d4acc>
gc: collectable <dict 0xb73dcf0c>
gc: collectable <instancemethod 0xb7d2daf4>
3
>>> print gc.garbage
[<tarfile.ExFileObject object at 0xb73d4acc>, {'name':
'x.txt', 'read': <bound method ExFileObject._readnormal
of <tarfile.ExFileObject object at 0xb73d4acc>>, 'pos':
0L, 'fileobj': <open file 'x.tar', mode 'rb' at
0xb73e67b8>, 'mode': 'r', 'closed': False, 'offset':
512L, 'linebuffer': '', 'size': 5L}, <bound method
ExFileObject._readnormal of <tarfile.ExFileObject
object at 0xb73d4acc>>]
>>>


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