diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index 67c1316..731d185 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -643,7 +643,7 @@ function _menu_item_localize(&$item, $map, $link_translate = FALSE) {
   //   including unserializing all existing link options and running this code
   //   on them, as well as adding validation to menu_link_save().
   if (isset($item['options']['attributes']['class']) && is_string($item['options']['attributes']['class'])) {
-    if ($link_translate) {
+    if ($item instanceof MenuLink) {
       $item->localized_options->attributes['class'] = explode(' ', $item->options->attributes['class']);
     }
     else {
@@ -676,9 +676,10 @@ function _menu_item_localize(&$item, $map, $link_translate = FALSE) {
       }
       // Avoid calling check_plain again on l() function.
       if ($title_callback == 'check_plain') {
-        if ($link_translate) {
+        if ($item instanceof MenuLink) {
           $item->localized_options->html = TRUE;
-        } else {
+        }
+        else {
           $item['localized_options']['html'] = TRUE;
         }
       }
diff --git a/core/modules/book/lib/Drupal/book/BookBreadcrumbBuilder.php b/core/modules/book/lib/Drupal/book/BookBreadcrumbBuilder.php
index 2fef927..93d9e8e 100644
--- a/core/modules/book/lib/Drupal/book/BookBreadcrumbBuilder.php
+++ b/core/modules/book/lib/Drupal/book/BookBreadcrumbBuilder.php
@@ -85,8 +85,8 @@ public function build(array $attributes) {
         $depth = 1;
         while (!empty($book['p' . ($depth + 1)])) {
           if (!empty($menu_links[$book['p' . $depth]]) && ($menu_link = $menu_links[$book['p' . $depth]])) {
-            if ($this->accessManager->checkNamedRoute($menu_link->route_name, $menu_link->route_parameters)) {
-              $links[] = $this->linkGenerator->generate($menu_link->label(), $menu_link->route_name, $menu_link->route_parameters, $menu_link->options);
+            if ($this->accessManager->checkNamedRoute($menu_link->route_name->value, $menu_link->route_parameters[0]->getValue())) {
+              $links[] = $this->linkGenerator->generate($menu_link->label(), $menu_link->route_name->value, $menu_link->route_parameters[0]->getValue(), $menu_link->options[0]->getValue());
             }
           }
           $depth++;
diff --git a/core/modules/menu_link/menu_link.module b/core/modules/menu_link/menu_link.module
index 7e0358e..b7b4449 100644
--- a/core/modules/menu_link/menu_link.module
+++ b/core/modules/menu_link/menu_link.module
@@ -208,7 +208,7 @@ function menu_link_system_breadcrumb_alter(array &$breadcrumb, array $attributes
     $menu_link = $attributes['menu_link'];
     if (($menu_link instanceof MenuLinkInterface) && !$menu_link->isNew()) {
       // Add a link to the menu admin screen.
-      $menu = entity_load('menu', $menu_link->menu_name);
+      $menu = entity_load('menu', $menu_link->menu_name->value);
       $breadcrumb[] = Drupal::l($menu->label(), 'menu.menu_edit', array('menu' => $menu->id));
     }
   }