Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony/dependency-injection/Compiler/CheckDefinitionValidityPass.php

@@ -0,0 +1,84 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+
+/**
+ * This pass validates each definition individually only taking the information
+ * into account which is contained in the definition itself.
+ *
+ * Later passes can rely on the following, and specifically do not need to
+ * perform these checks themselves:
+ *
+ * - non synthetic, non abstract services always have a class set
+ * - synthetic services are always public
+ * - synthetic services are always of non-prototype scope
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class CheckDefinitionValidityPass implements CompilerPassInterface
+{
+    /**
+     * Processes the ContainerBuilder to validate the Definition.
+     *
+     * @param ContainerBuilder $container
+     *
+     * @throws RuntimeException When the Definition is invalid
+     */
+    public function process(ContainerBuilder $container)
+    {
+        foreach ($container->getDefinitions() as $id => $definition) {
+            // synthetic service is public
+            if ($definition->isSynthetic() && !$definition->isPublic()) {
+                throw new RuntimeException(sprintf('A synthetic service ("%s") must be public.', $id));
+            }
+
+            // synthetic service has non-prototype scope
+            if ($definition->isSynthetic() && ContainerInterface::SCOPE_PROTOTYPE === $definition->getScope()) {
+                throw new RuntimeException(sprintf('A synthetic service ("%s") cannot be of scope "prototype".', $id));
+            }
+
+            if ($definition->getFactory() && ($definition->getFactoryClass(false) || $definition->getFactoryService(false) || $definition->getFactoryMethod(false))) {
+                throw new RuntimeException(sprintf('A service ("%s") can use either the old or the new factory syntax, not both.', $id));
+            }
+
+            // non-synthetic, non-abstract service has class
+            if (!$definition->isAbstract() && !$definition->isSynthetic() && !$definition->getClass()) {
+                if ($definition->getFactory() || $definition->getFactoryClass(false) || $definition->getFactoryService(false)) {
+                    throw new RuntimeException(sprintf('Please add the class to service "%s" even if it is constructed by a factory since we might need to add method calls based on compile-time checks.', $id));
+                }
+
+                throw new RuntimeException(sprintf(
+                    'The definition for "%s" has no class. If you intend to inject '
+                   .'this service dynamically at runtime, please mark it as synthetic=true. '
+                   .'If this is an abstract definition solely used by child definitions, '
+                   .'please add abstract=true, otherwise specify a class to get rid of this error.',
+                   $id
+                ));
+            }
+
+            // tag attribute values must be scalars
+            foreach ($definition->getTags() as $name => $tags) {
+                foreach ($tags as $attributes) {
+                    foreach ($attributes as $attribute => $value) {
+                        if (!is_scalar($value) && null !== $value) {
+                            throw new RuntimeException(sprintf('A "tags" attribute must be of a scalar-type for service "%s", tag "%s", attribute "%s".', $id, $name, $attribute));
+                        }
+                    }
+                }
+            }
+        }
+    }
+}