[DI] move RegisterServiceSubscribersPass before DecoratorServicePass

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

@@ -51,12 +51,12 @@ public function __construct()
         $this->optimizationPasses = array(array(
             new ResolveChildDefinitionsPass(),
             new ServiceLocatorTagPass(),
+            new RegisterServiceSubscribersPass(),
             new DecoratorServicePass(),
             new ResolveParameterPlaceHoldersPass(false),
             new ResolveFactoryClassPass(),
             new FactoryReturnTypePass($resolveClassPass),
             new CheckDefinitionValidityPass(),
-            new RegisterServiceSubscribersPass(),
             new ResolveNamedArgumentsPass(),
             new AutowireRequiredMethodsPass(),
             new ResolveBindingsPass(),

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

@@ -17,6 +17,7 @@
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
 use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\ServiceSubscriberInterface;
 
 /**
  * This class tests the integration of the different compiler passes.
@@ -117,6 +118,21 @@ public function testProcessInlinesWhenThereAreMultipleReferencesButFromTheSameDe
         $this->assertFalse($container->hasDefinition('c'), 'Service C was not inlined.');
     }
 
+    public function testCanDecorateServiceSubscriber()
+    {
+        $container = new ContainerBuilder();
+        $container->register(ServiceSubscriberStub::class)
+            ->addTag('container.service_subscriber')
+            ->setPublic(true);
+
+        $container->register(DecoratedServiceSubscriber::class)
+            ->setDecoratedService(ServiceSubscriberStub::class);
+
+        $container->compile();
+
+        $this->assertInstanceOf(DecoratedServiceSubscriber::class, $container->get(ServiceSubscriberStub::class));
+    }
+
     /**
      * @dataProvider getYamlCompileTests
      */
@@ -207,6 +223,18 @@ public function getYamlCompileTests()
     }
 }
 
+class ServiceSubscriberStub implements ServiceSubscriberInterface
+{
+    public static function getSubscribedServices()
+    {
+        return array();
+    }
+}
+
+class DecoratedServiceSubscriber
+{
+}
+
 class IntegrationTestStub extends IntegrationTestStubParent
 {
 }