https://github.com/python/cpython/commit/da15389fddb85cf8a97b81e75de7d77b5f5... commit: da15389fddb85cf8a97b81e75de7d77b5f505b56 branch: 3.7 author: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> committer: GitHub <noreply@github.com> date: 2018-10-31T02:31:29-07:00 summary: Fix a possible crash in range.__reversed__(). (GH-10252) (cherry picked from commit c9a6168924ffa4f3f78175998b392fe23d3edc50) Co-authored-by: Zackery Spytz <zspytz@gmail.com> files: M Objects/rangeobject.c diff --git a/Objects/rangeobject.c b/Objects/rangeobject.c index e4f778b1f8ea..037be870e36a 100644 --- a/Objects/rangeobject.c +++ b/Objects/rangeobject.c @@ -1154,6 +1154,7 @@ range_reverse(PyObject *seq) it = PyObject_New(longrangeiterobject, &PyLongRangeIter_Type); if (it == NULL) return NULL; + it->index = it->start = it->step = NULL; /* start + (len - 1) * step */ it->len = range->length;