Update to Drupal 8.0.0-beta15. For more information, see: https://www.drupal.org/node/2563023

core/lib/Drupal/Core/DependencyInjection/Compiler/TwigExtensionPass.php

@@ -0,0 +1,37 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\DependencyInjection\Compiler\TwigExtensionPass.
+ */
+
+namespace Drupal\Core\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+/**
+ * Adds the twig_extension_hash parameter to the container.
+ *
+ * twig_extension_hash is a hash of all extension mtimes for Twig template
+ * invalidation.
+ */
+class TwigExtensionPass implements CompilerPassInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function process(ContainerBuilder $container) {
+    $twig_extension_hash = '';
+    foreach (array_keys($container->findTaggedServiceIds('twig.extension')) as $service_id) {
+      $class_name = $container->getDefinition($service_id)->getClass();
+      $reflection = new \ReflectionClass($class_name);
+      // We use the class names as hash in order to invalidate on new extensions
+      // and mtime for every time we change an existing file.
+      $twig_extension_hash .= $class_name . filemtime($reflection->getFileName());
+    }
+
+    $container->setParameter('twig_extension_hash', hash('crc32b', $twig_extension_hash));
+  }
+
+}

core/lib/Drupal/Core/DependencyInjection/Container.php

@@ -7,17 +7,18 @@
 
 namespace Drupal\Core\DependencyInjection;
 
-use Symfony\Component\DependencyInjection\Container as SymfonyContainer;
+use Drupal\Component\DependencyInjection\Container as DrupalContainer;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
- * Extends the symfony container to set the service ID on the created object.
+ * Extends the Drupal container to set the service ID on the created object.
  */
-class Container extends SymfonyContainer {
+class Container extends DrupalContainer {
 
   /**
    * {@inheritdoc}
    */
-  public function set($id, $service, $scope = SymfonyContainer::SCOPE_CONTAINER) {
+  public function set($id, $service, $scope = ContainerInterface::SCOPE_CONTAINER) {
      parent::set($id, $service, $scope);
 
     // Ensure that the _serviceId property is set on synthetic services as well.
@@ -30,7 +31,7 @@ class Container extends SymfonyContainer {
    * {@inheritdoc}
    */
   public function __sleep() {
-    trigger_error('The container was serialized.', E_USER_ERROR);
+    assert(FALSE, 'The container was serialized.');
     return array_keys(get_object_vars($this));
   }
 

core/lib/Drupal/Core/DependencyInjection/ContainerBuilder.php

@@ -118,7 +118,7 @@ class ContainerBuilder extends SymfonyContainerBuilder {
    * {@inheritdoc}
    */
   public function __sleep() {
-    trigger_error('The container was serialized.', E_USER_ERROR);
+    assert(FALSE, 'The container was serialized.');
     return array_keys(get_object_vars($this));
   }