Issue #22570: Renamed Py_SETREF to Py_XSETREF.
diff --git a/Objects/listobject.c b/Objects/listobject.c
index 81b40ae..7c02be7 100644
--- a/Objects/listobject.c
+++ b/Objects/listobject.c
@@ -229,7 +229,7 @@
         return -1;
     }
     p = ((PyListObject *)op) -> ob_item + i;
-    Py_SETREF(*p, newitem);
+    Py_XSETREF(*p, newitem);
     return 0;
 }
 
@@ -735,7 +735,7 @@
     if (v == NULL)
         return list_ass_slice(a, i, i+1, v);
     Py_INCREF(v);
-    Py_SETREF(a->ob_item[i], v);
+    Py_XSETREF(a->ob_item[i], v);
     return 0;
 }