diff --git a/core/modules/config/tests/config_events_test/src/EventSubscriber.php b/core/modules/config/tests/config_events_test/src/EventSubscriber.php
index b127555..a15fabb 100644
--- a/core/modules/config/tests/config_events_test/src/EventSubscriber.php
+++ b/core/modules/config/tests/config_events_test/src/EventSubscriber.php
@@ -37,11 +37,13 @@ public function __construct(StateInterface $state) {
    *
    * @param \Drupal\Core\Config\ConfigCrudEvent $event
    *   The configuration event.
+   * @param string $name
+   *   The event name.
    */
-  public function configEventRecorder(ConfigCrudEvent $event) {
+  public function configEventRecorder(ConfigCrudEvent $event, $name) {
     $config = $event->getConfig();
     $this->state->set('config_events_test.event', array(
-      'event_name' => $event->getName(),
+      'event_name' => $name,
       'current_config_data' => $config->get(),
       'original_config_data' => $config->getOriginal(),
       'raw_config_data' => $config->getRawData()
diff --git a/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
index 7ed62ba..37a61ee 100644
--- a/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
+++ b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
@@ -351,7 +351,7 @@ public function massageFormValues(array $values, array $form, FormStateInterface
   public function flagErrors(FieldItemListInterface $items, ConstraintViolationListInterface $violations, array $form, FormStateInterface $form_state) {
     /** @var \Symfony\Component\Validator\ConstraintViolationInterface $violation */
     foreach ($violations as $offset => $violation) {
-      $parameters = $violation->getMessageParameters();
+      $parameters = $violation->getParameters();
       if (isset($parameters['@uri'])) {
         $parameters['@uri'] = static::getUriAsDisplayableString($parameters['@uri']);
         $violations->set($offset, new ConstraintViolation(
@@ -361,7 +361,7 @@ public function flagErrors(FieldItemListInterface $items, ConstraintViolationLis
           $violation->getRoot(),
           $violation->getPropertyPath(),
           $violation->getInvalidValue(),
-          $violation->getMessagePluralization(),
+          $violation->getPlural(),
           $violation->getCode()
         ));
       }
diff --git a/core/modules/rest/src/Plugin/ResourceBase.php b/core/modules/rest/src/Plugin/ResourceBase.php
index 14bca5e..14ae62b 100644
--- a/core/modules/rest/src/Plugin/ResourceBase.php
+++ b/core/modules/rest/src/Plugin/ResourceBase.php
@@ -111,7 +111,7 @@ public function routes() {
 
       switch ($method) {
         case 'POST':
-          $route->setPattern($create_path);
+          $route->setPath($create_path);
           // Restrict the incoming HTTP Content-type header to the known
           // serialization formats.
           $route->addRequirements(array('_content_type_format' => implode('|', $this->serializerFormats)));
@@ -206,7 +206,7 @@ protected function getBaseRoute($canonical_path, $method) {
       '_permission' => "restful $lower_method $this->pluginId",
     ),
       array(),
-      array(),
+      '',
       array(),
       // The HTTP method is a requirement for this route.
       array($method)
diff --git a/core/modules/rest/src/Routing/ResourceRoutes.php b/core/modules/rest/src/Routing/ResourceRoutes.php
index 484c48e..a561b8b 100644
--- a/core/modules/rest/src/Routing/ResourceRoutes.php
+++ b/core/modules/rest/src/Routing/ResourceRoutes.php
@@ -74,7 +74,8 @@ protected function alterRoutes(RouteCollection $collection) {
       $plugin = $this->manager->getInstance(array('id' => $id));
 
       foreach ($plugin->routes() as $name => $route) {
-        $method = $route->getRequirement('_method');
+        // @todo: Are multiple methods possible here?
+        $method = $route->getMethods()[0];
         // Only expose routes where the method is enabled in the configuration.
         if ($method && isset($enabled_methods[$method])) {
           $route->setRequirement('_access_rest_csrf',  'TRUE');