[issue30347] itertools.groupby() can fail a C assert()

[Serhiy Storchaka]

Serhiy Storchaka added the comment:


New changeset c740e4fe8a9bc5815dc18c38d7f7600b128c3c51 by Serhiy Storchaka in branch 'master':
bpo-30347: Stop crashes when concurrently iterate over itertools.groupby() iterators. (#1557)
https://github.com/python/cpython/commit/c740e4fe8a9bc5815dc18c38d7f7600b128c3c51


----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue30347>
_______________________________________