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diff --git a/vendor/symfony/dependency-injection/Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php b/vendor/symfony/dependency-injection/Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php
new file mode 100644
index 000000000..304f78495
--- /dev/null
+++ b/vendor/symfony/dependency-injection/Compiler/CheckExceptionOnInvalidReferenceBehaviorPass.php
@@ -0,0 +1,63 @@
+<?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\Definition;
+use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+/**
+ * Checks that all references are pointing to a valid service.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class CheckExceptionOnInvalidReferenceBehaviorPass implements CompilerPassInterface
+{
+    private $container;
+    private $sourceId;
+
+    public function process(ContainerBuilder $container)
+    {
+        $this->container = $container;
+
+        foreach ($container->getDefinitions() as $id => $definition) {
+            $this->sourceId = $id;
+            $this->processDefinition($definition);
+        }
+    }
+
+    private function processDefinition(Definition $definition)
+    {
+        $this->processReferences($definition->getArguments());
+        $this->processReferences($definition->getMethodCalls());
+        $this->processReferences($definition->getProperties());
+    }
+
+    private function processReferences(array $arguments)
+    {
+        foreach ($arguments as $argument) {
+            if (is_array($argument)) {
+                $this->processReferences($argument);
+            } elseif ($argument instanceof Definition) {
+                $this->processDefinition($argument);
+            } elseif ($argument instanceof Reference && ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE === $argument->getInvalidBehavior()) {
+                $destId = (string) $argument;
+
+                if (!$this->container->has($destId)) {
+                    throw new ServiceNotFoundException($destId, $this->sourceId);
+                }
+            }
+        }
+    }
+}