PyTuple_SetItem should require that the tuple's refcnt is one!

787bdd37 · Guido van Rossum · 607b33a1 · 787bdd37
Commit 787bdd37 authored Aug 17, 1997 by Guido van Rossum
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Objects/tupleobject.c Objects/tupleobject.c +1 -1

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--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -133,7 +133,7 @@ PyTuple_SetItem(op, i, newitem)
 {
 	register PyObject *olditem;
 	register PyObject **p;
-	if (!PyTuple_Check(op)) {
+	if (!PyTuple_Check(op) || op->ob_refcnt != 1) {
 		Py_XDECREF(newitem);
 		PyErr_BadInternalCall();
 		return -1;