From c9a6168924ffa4f3f78175998b392fe23d3edc50 Mon Sep 17 00:00:00 2001
From: Zackery Spytz <zspytz@gmail.com>
Date: Wed, 31 Oct 2018 03:13:16 -0600
Subject: [PATCH] Fix a possible crash in range.__reversed__(). (GH-10252)

---
 Objects/rangeobject.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Objects/rangeobject.c b/Objects/rangeobject.c
index 2b00a17425a..e7b47bde666 100644
--- a/Objects/rangeobject.c
+++ b/Objects/rangeobject.c
@@ -1154,6 +1154,7 @@ long_range:
     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;