Don't memoize the empty tuple in protocol 0.

49579027 · Guido van Rossum · bfd1dd08 · 49579027
Commit 49579027 authored Jan 28, 2003 by Guido van Rossum
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Lib/pickle.py Lib/pickle.py +2 -1

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--- 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