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# Test case taken from test_itertools
# See http://mail.python.org/pipermail/python-dev/2005-November/058339.html
from itertools import tee
def leak():
def fib():
def yield_identity_forever(g):
while 1:
yield g
def _fib():
for i in yield_identity_forever(head):
yield i
head, tail, result = tee(_fib(), 3)
return result
x = fib()
x.next()
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