Throw exception if child element is not iterable

Author: W0rma

FormErrorIterator.php

@@ -190,8 +190,7 @@ public function hasChildren(): bool
     public function getChildren(): self
     {
         if (!$this->hasChildren()) {
-            trigger_deprecation('symfony/form', '5.4', 'Calling "%s()" if the current element is not iterable is deprecated, call "%s" to get the current element.', __METHOD__, self::class.'::current()');
-            // throw new LogicException(sprintf('The current element is not iterable. Use "%s" to get the current element.', self::class.'::current()'));
+            throw new LogicException(sprintf('The current element is not iterable. Use "%s" to get the current element.', self::class.'::current()'));
         }
 
         return current($this->errors);