Fix for SF bug 571885
When resizing a tuple, zero out the memory starting at the end of the
old tuple not at the beginning of the old tuple.
diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index 525e8f6..4c264fd 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -696,8 +696,8 @@
_Py_NewReference((PyObject *) sv);
/* Zero out items added by growing */
if (newsize > oldsize)
- memset(sv->ob_item, 0,
- sizeof(*sv->ob_item) * (newsize - oldsize));
+ memset(&sv->ob_item[oldsize], 0,
+ sizeof(*sv->ob_item) * (newsize - oldsize));
*pv = (PyObject *) sv;
_PyObject_GC_TRACK(sv);
return 0;