Ticket #24548: nav-menu-template.php.24548.patch

wp-includes/nav-menu-template.php

@@ -433 +433 @@
                                         'post_type' == $parent_item->type &&
                                         ! empty( $queried_object->post_type ) &&
                                         is_post_type_hierarchical( $queried_object->post_type ) &&
+                                        is_array( $queried_object->ancestors ) && 
                                         in_array( $parent_item->object_id, $queried_object->ancestors ) &&
                                         $parent_item->object != $queried_object->ID
                                 ) ||
@@ -441 +442 @@
                                 (
                                         'taxonomy' == $parent_item->type &&
                                         isset( $possible_taxonomy_ancestors[ $parent_item->object ] ) &&
+                                        is_array( $possible_taxonomy_ancestors[ $parent_item->object ] ) && 
                                         in_array( $parent_item->object_id, $possible_taxonomy_ancestors[ $parent_item->object ] ) &&
                                         (
                                                 ! isset( $queried_object->term_id ) ||