From cbe2dbddda7bbcf2f27ba668b86b21596c900edf Mon Sep 17 00:00:00 2001
From: Guido van Rossum <guido@python.org>
Date: Tue, 28 Jan 2003 14:40:16 +0000
Subject: [PATCH] Don't memoize the empty tuple in protocol 0.

---
 Lib/pickle.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Lib/pickle.py b/Lib/pickle.py
index 02288d8f731..2baee460253 100644
--- a/Lib/pickle.py
+++ b/Lib/pickle.py
@@ -502,7 +502,8 @@ class Pickler:
 
         # No recursion (including the empty-tuple case for protocol 0).
         self.write(TUPLE)
-        self.memoize(object) # XXX shouldn't memoize empty tuple?!
+        if object:                      # No need to memoize empty tuple
+            self.memoize(object)
 
     dispatch[TupleType] = save_tuple