Issue #22570: Renamed Py_SETREF to Py_XSETREF.
diff --git a/Modules/cjkcodecs/multibytecodec.c b/Modules/cjkcodecs/multibytecodec.c
index 70a606f..e1cdb2c 100644
--- a/Modules/cjkcodecs/multibytecodec.c
+++ b/Modules/cjkcodecs/multibytecodec.c
@@ -793,7 +793,7 @@
                               ctx->errors, final ? MBENC_FLUSH | MBENC_RESET : 0);
     if (r == NULL) {
         /* recover the original pending buffer */
-        Py_SETREF(ctx->pending, origpending);
+        Py_XSETREF(ctx->pending, origpending);
         origpending = NULL;
         goto errorexit;
     }