diff -u b/core/modules/user/lib/Drupal/user/Plugin/views/argument_validator/User.php b/core/modules/user/lib/Drupal/user/Plugin/views/argument_validator/User.php
--- b/core/modules/user/lib/Drupal/user/Plugin/views/argument_validator/User.php
+++ b/core/modules/user/lib/Drupal/user/Plugin/views/argument_validator/User.php
@@ -30,7 +30,7 @@
   /**
    * {@inheritdoc}
    */
-  public function __construct(array $configuration, $plugin_id, array $plugin_definition, EntityManagerInterface $entity_manager) {
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityManagerInterface $entity_manager) {
     parent::__construct($configuration, $plugin_id, $plugin_definition, $entity_manager);
 
     $this->userStorage = $entity_manager->getStorageController('user');
@@ -39,12 +39,12 @@
    *   A configuration array containing information about the plugin instance.
    * @param string $plugin_id
    *   The plugin_id for the plugin instance.
-   * @param mixed $plugin_definition
+   * @param array $plugin_definition
    *   The plugin implementation definition.
    * @param \Drupal\Core\Database\Connection $database
    *   Database Service Object.
    */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, Connection $database) {
+  public function __construct(array $configuration, $plugin_id, array $plugin_definition, Connection $database) {
     parent::__construct($configuration, $plugin_id, $plugin_definition);
 
     $this->database = $database;
@@ -53,7 +53,7 @@
   /**
    * {@inheritdoc}
    */
-  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, array $plugin_definition) {
     return new static($configuration, $plugin_id, $plugin_definition, $container->get('database'));
   }
 
only in patch2:
unchanged:
--- a/core/modules/user/lib/Drupal/user/Plugin/LanguageNegotiation/LanguageNegotiationUserAdmin.php
+++ b/core/modules/user/lib/Drupal/user/Plugin/LanguageNegotiation/LanguageNegotiationUserAdmin.php
@@ -66,7 +66,7 @@ public function __construct(AdminContext $admin_context, UrlMatcherInterface $ro
   /**
    * {@inheritdoc}
    */
-  public static function create(ContainerInterface $container, array $configuration, $plugin_id, array $plugin_definition) {
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
     return new static(
       $container->get('router.admin_context'),
       $container->get('router')