From 6902ddf2cab4900fa01248c313e7d4a7e67d97f7 Mon Sep 17 00:00:00 2001
From: Victor Stinner <victor.stinner@gmail.com>
Date: Fri, 19 Aug 2016 17:58:12 +0200
Subject: [PATCH] Fix a refleak in call_maybe()

Issue #27128. Fix a reference leak if creating the tuple to pass positional
parameters fails.
---
 Objects/typeobject.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index a78f328ca79..1181d77efd0 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -1470,8 +1470,10 @@ call_maybe(PyObject *o, _Py_Identifier *nameid, char *format, ...)
 
     va_end(va);
 
-    if (args == NULL)
+    if (args == NULL) {
+        Py_DECREF(func);
         return NULL;
+    }
 
     assert(PyTuple_Check(args));
     retval = PyObject_Call(func, args, NULL);