From 77681badabb0f1a94a7d745aba376c534b2826d2 Mon Sep 17 00:00:00 2001
From: Stefan Behnel <stefan_ml@behnel.de>
Date: Mon, 30 Oct 2023 07:09:52 +0100
Subject: [PATCH] gh-106168: Check the index bound assertions in
 PyList_SET_ITEM() against [0:allocated] instead of [0:size] to re-allow valid
 use cases that assign within the allocated area.

---
 Include/cpython/listobject.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Include/cpython/listobject.h b/Include/cpython/listobject.h
index 661610548733fd..c4d9052a09ef42 100644
--- a/Include/cpython/listobject.h
+++ b/Include/cpython/listobject.h
@@ -39,7 +39,7 @@ static inline void
 PyList_SET_ITEM(PyObject *op, Py_ssize_t index, PyObject *value) {
     PyListObject *list = _PyList_CAST(op);
     assert(0 <= index);
-    assert(index < Py_SIZE(list));
+    assert(index < list->allocated);
     list->ob_item[index] = value;
 }
 #define PyList_SET_ITEM(op, index, value) \