Issue #22570: Renamed Py_SETREF to Py_XSETREF.
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index 9ae068c..e4f7fc4 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -574,8 +574,8 @@
         oerrors = Py_None;
         Py_INCREF(Py_None);
     }
-    Py_SETREF(file->f_encoding, str);
-    Py_SETREF(file->f_errors, oerrors);
+    Py_XSETREF(file->f_encoding, str);
+    Py_XSETREF(file->f_errors, oerrors);
     return 1;
 }