diff -u b/core/modules/menu_link_content/src/Plugin/migrate/source/d6/I18nMenuLink.php b/core/modules/menu_link_content/src/Plugin/migrate/source/d6/I18nMenuLink.php
--- b/core/modules/menu_link_content/src/Plugin/migrate/source/d6/I18nMenuLink.php
+++ b/core/modules/menu_link_content/src/Plugin/migrate/source/d6/I18nMenuLink.php
@@ -42,9 +42,8 @@
    */
   protected function values() {
     $values = [];
-    $result = $this->prepareQuery();
-    $result->execute();
-    $result->fetchAll();
+    $query = $this->prepareQuery();
+    $result = $query->execute()->fetchAll();
     $cnt = count($result);
     for ($i = 0; $i < $cnt; $i++) {
       if (isset($result[$i])) {