diff --git a/core/lib/Drupal/Core/Form/FormValidator.php b/core/lib/Drupal/Core/Form/FormValidator.php
index a9a3c83..a6c3fcf 100644
--- a/core/lib/Drupal/Core/Form/FormValidator.php
+++ b/core/lib/Drupal/Core/Form/FormValidator.php
@@ -218,8 +218,8 @@ protected function doValidateForm(&$elements, FormStateInterface &$form_state, $
     // error messages displayed to the user matches the order of elements in
     // the form. Use a copy of $elements so that it is not modified by the
     // sorting itself.
-    $elements_copy = $elements;
-    foreach (Element::children($elements_copy, TRUE) as $key) {
+    $elements_sorted = $elements;
+    foreach (Element::children($elements_sorted, TRUE) as $key) {
       if (isset($elements[$key]) && $elements[$key]) {
         $this->doValidateForm($elements[$key], $form_state);
       }