New submission from Armin Rigo:
This triggers an assert() failure on debug-mode Python (or a leak in release
Python):
from itertools import groupby
def f(n):
print("enter:", n)
if n == 5:
list(b)
print("leave:", n)
return n != 6
for (k, b) in groupby(range(10), f):
print(list(b))
With current trunk we get: python: ./Modules/itertoolsmodule.c:303:
_grouper_next: Assertion `gbo->currkey == NULL' failed.
----------
components: Interpreter Core
messages: 293517
nosy: arigo
priority: normal
severity: normal
status: open
title: itertools.groupby() can fail a C assert()
type: crash
versions: Python 2.7, Python 3.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue30347>
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