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/_bz2module.c b/Modules/_bz2module.c
index 7dfd307..425845f 100644
--- a/Modules/_bz2module.c
+++ b/Modules/_bz2module.c
@@ -540,9 +540,8 @@
     if (d->eof) {
         d->needs_input = 0;
         if (d->bzs_avail_in_real > 0) {
-            Py_CLEAR(d->unused_data);
-            d->unused_data = PyBytes_FromStringAndSize(
-                bzs->next_in, d->bzs_avail_in_real);
+            Py_SETREF(d->unused_data,
+                      PyBytes_FromStringAndSize(bzs->next_in, d->bzs_avail_in_real));
             if (d->unused_data == NULL)
                 goto error;
         }