[Python-bugs-list] [Bug #129810] Memore leak in pickle and cPickle
noreply@sourceforge.net
noreply@sourceforge.net
Tue, 23 Jan 2001 19:28:10 -0800
Bug #129810, was updated on 2001-Jan-23 07:28
Here is a current snapshot of the bug.
Project: Python
Category: Python Library
Status: Open
Resolution: None
Bug Group: Irreproducible
Priority: 5
Submitted by: vlk
Assigned to : bwarsaw
Summary: Memore leak in pickle and cPickle
Details: # When Pickler.object is used for dump typles into file and
Unpickler for
# load from files. A loaded object are not garbage collected.
# When function dump(object,file) is used Unpickler works fine.
# Problem is in pickle and cPickle module
# tested on Python 2.0 Red Hat Linux 6.2
import cPickle
#import pickle
import gc
f=open("xxx","w")
pic=cPickle.Pickler(f,1) # ERROR
#pic=pickle.Pickler(f,1) # ERROR
for i in range(100):
#cPickle.dump(([long(i),long(i),long(i),long(i)],i),f)
# this is OK
#pickle.dump(([long(i),long(i),long(i),long(i)],i),f)
# this is OK
pic.dump(([long(i),long(i),long(i),long(i)],i))
# Memory leak
f.close()
gc.set_debug(gc.DEBUG_STATS)
f=open("xxx","r")
u=cPickle.Unpickler(f)
try:
while 1:
gc.collect()
print u.load()
except EOFError:
pass
f.close()
Follow-Ups:
Date: 2001-Jan-23 19:28
By: gvanrossum
Comment:
Barry, can you look into this? I would first see if this is really
reproducable without using Insure++; somehow it looks a bit fishy. Could
also be fixed in 2.1 because now modules participate in gc. Or could have
to do with a __del__? Also, I doubt the claim that this is a leak with
both pickle and cPickle.
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http://sourceforge.net/bugs/?func=detailbug&bug_id=129810&group_id=5470