From 7d98fb9806907ae6849f57c66af9248952120cd9 Mon Sep 17 00:00:00 2001
From: Raymond Hettinger <python@rcn.com>
Date: Tue, 17 Jun 2003 23:14:40 +0000
Subject: [PATCH] Add missing DECREF.

---
 Modules/itertoolsmodule.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Modules/itertoolsmodule.c b/Modules/itertoolsmodule.c
index e2e820e6386..0a20c1b5682 100644
--- a/Modules/itertoolsmodule.c
+++ b/Modules/itertoolsmodule.c
@@ -1010,8 +1010,10 @@ chain_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 
 	/* create chainobject structure */
 	lz = (chainobject *)type->tp_alloc(type, 0);
-	if (lz == NULL)
+	if (lz == NULL) {
+		Py_DECREF(ittuple);
 		return NULL;
+	}
 
 	lz->ittuple = ittuple;
 	lz->iternum = 0;