From c89d28fdfc3654daf1d112e76d3b6cca80c5bb00 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Tue, 2 Oct 2012 12:54:07 +0200
Subject: [PATCH] Issue #15609: Fix refleak introduced by my last optimization

---
 Objects/unicodeobject.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 606aa3327c9..83f2a2a9ba8 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -13449,8 +13449,11 @@ mainformatlong(_PyUnicodeWriter *writer, PyObject *v,
                 break;
         }
 
-        if (_PyLong_FormatWriter(writer, v, base, alternate) == -1)
+        if (_PyLong_FormatWriter(writer, v, base, alternate) == -1) {
+            Py_DECREF(iobj);
             return -1;
+        }
+        Py_DECREF(iobj);
         return 1;
     }