Issue #20440: Applied yet one patch for using Py_SETREF.
The patch is automatically generated, it replaces the code that uses Py_CLEAR.
diff --git a/Modules/_pickle.c b/Modules/_pickle.c
index 56bbd58..2a070e2 100644
--- a/Modules/_pickle.c
+++ b/Modules/_pickle.c
@@ -846,9 +846,8 @@
 static int
 _Pickler_ClearBuffer(PicklerObject *self)
 {
-    Py_CLEAR(self->output_buffer);
-    self->output_buffer =
-        PyBytes_FromStringAndSize(NULL, self->max_output_len);
+    Py_SETREF(self->output_buffer,
+              PyBytes_FromStringAndSize(NULL, self->max_output_len));
     if (self->output_buffer == NULL)
         return -1;
     self->output_len = 0;
@@ -3089,9 +3088,8 @@
                          Py_TYPE(item)->tp_name);
             return -1;
         }
-        Py_CLEAR(*module_name);
         Py_INCREF(item);
-        *module_name = item;
+        Py_SETREF(*module_name, item);
     }
     else if (PyErr_Occurred()) {
         return -1;