[issue2246] itertools.groupby() leaks memory with circular reference
Alexander Belopolsky
report at bugs.python.org
Thu Mar 6 21:48:10 CET 2008
Alexander Belopolsky added the comment:
With the following patch:
===================================================================
--- Lib/test/test_itertools.py (revision 61284)
+++ Lib/test/test_itertools.py (working copy)
@@ -707,6 +707,12 @@
a = []
self.makecycle(takewhile(bool, [1, 0, a, a]), a)
+ def test_issue2246(self):
+ n = 10
+ keyfunc = lambda x: x
+ for i, j in groupby(xrange(n), key=keyfunc):
+ keyfunc.__dict__.setdefault('x',[]).append(j)
+
def R(seqn):
'Regular generator'
for i in seqn:
$ ./python Lib/test/regrtest.py -R :: test_itertools
reports n*3 + 13 reference leaks. This should give a clue ...
----------
nosy: +belopolsky
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Tracker <report at bugs.python.org>
<http://bugs.python.org/issue2246>
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