[issue13454] crash when deleting one pair from tee()

[Pyry Pakkanen]

New submission from Pyry Pakkanen <frostburn at suomi24.fi>:

Running the following results in a Segmentation fault on Ubuntu 11.10 64-bit with both python and python3.

from itertools import *
c = count()
a,b = tee(c)
for i in range(10000000):
 next(a)
del(b)

----------
messages: 148124
nosy: PyryP
priority: normal
severity: normal
status: open
title: crash when deleting one pair from tee()
type: crash
versions: Python 2.7, Python 3.2

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue13454>
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