From b5244a3fe5aa15c41311fe124f5ba1b209f7c316 Mon Sep 17 00:00:00 2001
From: Raymond Hettinger <python@rcn.com>
Date: Sun, 16 Aug 2015 14:24:20 -0700
Subject: [PATCH] Inline PyIter_Next() matching what was done for other
 itertools.

---
 Modules/itertoolsmodule.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Modules/itertoolsmodule.c b/Modules/itertoolsmodule.c
index 18d55d82160..bba0935898d 100644
--- a/Modules/itertoolsmodule.c
+++ b/Modules/itertoolsmodule.c
@@ -1860,7 +1860,7 @@ chain_next(chainobject *lz)
             return NULL;                                /* input not iterable */
         }
     }
-    item = PyIter_Next(lz->active);
+    item = (*Py_TYPE(lz->active)->tp_iternext)(lz->active);
     if (item != NULL)
         return item;
     if (PyErr_Occurred()) {
@@ -3434,7 +3434,7 @@ accumulate_next(accumulateobject *lz)
 {
     PyObject *val, *oldtotal, *newtotal;
 
-    val = PyIter_Next(lz->it);
+    val = (*Py_TYPE(lz->it)->tp_iternext)(lz->it);
     if (val == NULL)
         return NULL;