indicate safe fast cast to avoid redundant future checks

picnixz · picnixz · commit fc28046a0ba3 · 2025-01-25T15:39:56.000+01:00
diff --git a/Modules/_pickle.c b/Modules/_pickle.c
@@ -5062,7 +5062,7 @@ Pickler_set_memo(PyObject *op, PyObject *obj, void *Py_UNUSED(ignored))
 
     PickleState *st = _Pickle_FindStateByType(Py_TYPE(self));
     if (Py_IS_TYPE(obj, st->PicklerMemoProxyType)) {
-        PicklerObject *pickler =
+        PicklerObject *pickler = /* safe fast cast for 'obj' */
             ((PicklerMemoProxyObject *)obj)->pickler;
 
         new_memo = PyMemoTable_Copy(pickler->memo);
@@ -7557,7 +7557,7 @@ Unpickler_set_memo(PyObject *op, PyObject *obj, void *Py_UNUSED(ignored))
 
     PickleState *state = _Pickle_FindStateByType(Py_TYPE(self));
     if (Py_IS_TYPE(obj, state->UnpicklerMemoProxyType)) {
-        UnpicklerObject *unpickler =
+        UnpicklerObject *unpickler = /* safe fast cast for 'obj' */
             ((UnpicklerMemoProxyObject *)obj)->unpickler;
 
         new_memo_size = unpickler->memo_size;
