From b3d3ee4fef6d1beb547671d12c514c86657b9223 Mon Sep 17 00:00:00 2001
From: Christian Heimes <christian@cheimes.de>
Date: Sat, 23 Nov 2013 21:01:40 +0100
Subject: [PATCH] Issue #17810: Add NULL check to save_frozenset CID 1131949: 
 Dereference null return value  (NULL_RETURNS)

---
 Modules/_pickle.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Modules/_pickle.c b/Modules/_pickle.c
index f9aa043a42..b63a7d92c5 100644
--- a/Modules/_pickle.c
+++ b/Modules/_pickle.c
@@ -2940,6 +2940,9 @@ save_frozenset(PicklerObject *self, PyObject *obj)
         return -1;
 
     iter = PyObject_GetIter(obj);
+    if (iter == NULL) {
+        return NULL;
+    }
     for (;;) {
         PyObject *item;
 
-- 
2.40.0