From 336c699236ab04e8b441b2fcf382c382e3d95631 Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Mon, 30 Sep 1996 22:00:50 +0000
Subject: [PATCH] Fix subtle bug detected by Jim F.

---
 Objects/abstract.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Objects/abstract.c b/Objects/abstract.c
index e0483a1b83..382b1fe8a4 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -1032,7 +1032,7 @@ PyObject_CallMethod(va_alist) va_dcl
       return 0;
     }
 
-  if(format)
+  if(format && *format)
     args = Py_VaBuildValue(format, va);
   else
     args = PyTuple_New(0);
-- 
2.50.1