[DependencyInjection] Fixed variadic method parameter in autowired classes

src/Symfony/Component/DependencyInjection/Compiler/AutowirePass.php

@@ -338,10 +338,11 @@ class AutowirePass implements CompilerPassInterface
                 $class = false;
             }
 
+            $isVariadic = method_exists($parameter, 'isVariadic') && $parameter->isVariadic();
             $methodArgumentsMetadata[] = array(
                 'class' => $class,
                 'isOptional' => $parameter->isOptional(),
-                'defaultValue' => $parameter->isOptional() ? $parameter->getDefaultValue() : null,
+                'defaultValue' => ($parameter->isOptional() && !$isVariadic) ? $parameter->getDefaultValue() : null,
             );
         }
 

src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowirePassTest.php

@@ -14,6 +14,7 @@ namespace Symfony\Component\DependencyInjection\Tests\Compiler;
 use Symfony\Component\DependencyInjection\Compiler\AutowirePass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\includes\FooVariadic;
 
 /**
  * @author Kévin Dunglas <dunglas@gmail.com>
@@ -35,6 +36,23 @@ class AutowirePassTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('foo', (string) $container->getDefinition('bar')->getArgument(0));
     }
 
+    /**
+     * @requires PHP 5.6
+     */
+    public function testProcessVariadic()
+    {
+        $container = new ContainerBuilder();
+        $container->register('foo', Foo::class);
+        $definition = $container->register('fooVariadic', FooVariadic::class);
+        $definition->setAutowired(true);
+
+        $pass = new AutowirePass();
+        $pass->process($container);
+
+        $this->assertCount(1, $container->getDefinition('fooVariadic')->getArguments());
+        $this->assertEquals('foo', (string) $container->getDefinition('fooVariadic')->getArgument(0));
+    }
+
     public function testProcessAutowireParent()
     {
         $container = new ContainerBuilder();

src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/FooVariadic.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Symfony\Component\DependencyInjection\Tests\Fixtures\includes;
+
+use Symfony\Component\DependencyInjection\Tests\Compiler\Foo;
+
+class FooVariadic
+{
+    public function __construct(Foo $foo)
+    {
+    }
+
+    public function bar(...$arguments)
+    {
+    }
+}