Ticket #37344: 37344.patch

class-walker-nav-menu.php

@@ -85 +85 @@
          * @param int    $id     Current item ID.
          */
         public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
+                $args = (array) $args; // cast to array prevents object-by-reference side effects
                 $indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
 
                 $classes = empty( $item->classes ) ? array() : (array) $item->classes;
@@ -99 +100 @@
                  * @param object $item  Menu item data object.
                  * @param int    $depth Depth of menu item. Used for padding.
                  */
-                $args = apply_filters( 'nav_menu_item_args', $args, $item, $depth );
+                $args = apply_filters( 'nav_menu_item_args', (object) $args, $item, $depth );
 
                 /**
                  * Filters the CSS class(es) applied to a menu item's list item element.