diff --git a/phpunit b/phpunit
index cb572db266..c0ffe8ddef 100755
--- a/phpunit
+++ b/phpunit
@@ -1,7 +1,7 @@
 #!/usr/bin/env php
 <?php
 
-// Cache-Id: https://github.com/symfony/phpunit-bridge/commit/3646664aa952fe13e9a612a726cbb38e02249793
+// Cache-Id: https://github.com/symfony/phpunit-bridge/commit/66ffffcd8a6bb23aec847c8bdfb918610399499a
 
 if (!file_exists(__DIR__.'/vendor/symfony/phpunit-bridge/bin/simple-phpunit')) {
     echo "Unable to find the `simple-phpunit` script in `vendor/symfony/phpunit-bridge/bin/`.\nPlease run `composer update` before running this command.\n";
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
index 4a2fd5e269..4874b1bba3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
@@ -137,10 +137,6 @@ class FrameworkExtension extends Extension
                 throw new LogicException('Translation support cannot be enabled as the Translation component is not installed.');
             }
 
-            if (!class_exists('Symfony\Component\Translation\Translator') && $this->isConfigEnabled($container, $config['validation'])) {
-                throw new LogicException('Validation support cannot be enabled as the Translation component is not installed.');
-            }
-
             if (class_exists(Translator::class)) {
                 $loader->load('identity_translator.xml');
             }
@@ -184,6 +180,10 @@ class FrameworkExtension extends Extension
         }
 
         if ($this->isConfigEnabled($container, $config['form'])) {
+            if (!class_exists('Symfony\Component\Form\Form')) {
+                throw new LogicException('Form support cannot be enabled as the Form component is not installed.');
+            }
+
             $this->formConfigEnabled = true;
             $this->registerFormConfiguration($config, $container, $loader);
 
@@ -231,6 +231,10 @@ class FrameworkExtension extends Extension
         $this->registerPropertyAccessConfiguration($config['property_access'], $container, $loader);
 
         if ($this->isConfigEnabled($container, $config['serializer'])) {
+            if (!class_exists('Symfony\Component\Serializer\Serializer')) {
+                throw new LogicException('Serializer support cannot be enabled as the Serializer component is not installed.');
+            }
+
             $this->registerSerializerConfiguration($config['serializer'], $container, $loader);
         }
 
@@ -923,6 +927,7 @@ class FrameworkExtension extends Extension
                     return 2 === substr_count($file->getBasename(), '.') && preg_match('/\.\w+$/', $file->getBasename());
                 })
                 ->in($dirs)
+                ->sortByName()
             ;
 
             foreach ($finder as $file) {
@@ -1032,7 +1037,7 @@ class FrameworkExtension extends Extension
 
     private function registerMappingFilesFromDir($dir, callable $fileRecorder)
     {
-        foreach (Finder::create()->followLinks()->files()->in($dir)->name('/\.(xml|ya?ml)$/') as $file) {
+        foreach (Finder::create()->followLinks()->files()->in($dir)->name('/\.(xml|ya?ml)$/')->sortByName() as $file) {
             $fileRecorder($file->getExtension(), $file->getRealPath());
         }
     }
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
index 8351c86112..4b5270659e 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/SecurityExtension.php
@@ -349,7 +349,7 @@ class SecurityExtension extends Extension
         // Switch user listener
         if (isset($firewall['switch_user'])) {
             $listenerKeys[] = 'switch_user';
-            $listeners[] = new Reference($this->createSwitchUserListener($container, $id, $firewall['switch_user'], $defaultProvider, $firewall['stateless']));
+            $listeners[] = new Reference($this->createSwitchUserListener($container, $id, $firewall['switch_user'], $defaultProvider, $firewall['stateless'], $providerIds));
         }
 
         // Access listener
@@ -594,7 +594,7 @@ class SecurityExtension extends Extension
         return $exceptionListenerId;
     }
 
-    private function createSwitchUserListener($container, $id, $config, $defaultProvider = null, $stateless)
+    private function createSwitchUserListener($container, $id, $config, $defaultProvider, $stateless, $providerIds)
     {
         $userProvider = isset($config['provider']) ? $this->getUserProviderId($config['provider']) : $defaultProvider;
 
diff --git a/src/Symfony/Bundle/SecurityBundle/composer.json b/src/Symfony/Bundle/SecurityBundle/composer.json
index 03183aafe0..93e49ad9af 100644
--- a/src/Symfony/Bundle/SecurityBundle/composer.json
+++ b/src/Symfony/Bundle/SecurityBundle/composer.json
@@ -30,7 +30,7 @@
         "symfony/dom-crawler": "~3.4|~4.0",
         "symfony/event-dispatcher": "~3.4|~4.0",
         "symfony/form": "~3.4|~4.0",
-        "symfony/framework-bundle": "~3.4|~4.0",
+        "symfony/framework-bundle": "~3.4-rc1|~4.0-rc1",
         "symfony/http-foundation": "~3.4|~4.0",
         "symfony/translation": "~3.4|~4.0",
         "symfony/twig-bundle": "~3.4|~4.0",
@@ -40,7 +40,7 @@
         "symfony/var-dumper": "~3.4|~4.0",
         "symfony/yaml": "~3.4|~4.0",
         "symfony/expression-language": "~3.4|~4.0",
-        "doctrine/doctrine-bundle": "~1.4",
+        "doctrine/doctrine-bundle": "~1.5",
         "twig/twig": "~1.34|~2.4"
     },
     "conflict": {
diff --git a/src/Symfony/Component/DependencyInjection/ContainerBuilder.php b/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
index f2d121be5a..94ac508c1b 100644
--- a/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
+++ b/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
@@ -544,7 +544,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
         $this->{$loading}[$id] = true;
 
         try {
-            $service = $this->createService($definition, $id);
+            $service = $this->createService($definition, new \SplObjectStorage(), $id);
         } finally {
             unset($this->{$loading}[$id]);
         }
@@ -978,8 +978,12 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      * @throws RuntimeException         When the service is a synthetic service
      * @throws InvalidArgumentException When configure callable is not callable
      */
-    private function createService(Definition $definition, $id, $tryProxy = true)
+    private function createService(Definition $definition, \SplObjectStorage $inlinedDefinitions, $id = null, $tryProxy = true)
     {
+        if (null === $id && isset($inlinedDefinitions[$definition])) {
+            return $inlinedDefinitions[$definition];
+        }
+
         if ($definition instanceof ChildDefinition) {
             throw new RuntimeException(sprintf('Constructing service "%s" from a parent definition is not supported at build time.', $id));
         }
@@ -998,11 +1002,11 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
                 ->instantiateProxy(
                     $this,
                     $definition,
-                    $id, function () use ($definition, $id) {
-                        return $this->createService($definition, $id, false);
+                    $id, function () use ($definition, $inlinedDefinitions, $id) {
+                        return $this->createService($definition, $inlinedDefinitions, $id, false);
                     }
                 );
-            $this->shareService($definition, $proxy, $id);
+            $this->shareService($definition, $proxy, $id, $inlinedDefinitions);
 
             return $proxy;
         }
@@ -1013,7 +1017,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
             require_once $parameterBag->resolveValue($definition->getFile());
         }
 
-        $arguments = $this->resolveServices($parameterBag->unescapeValue($parameterBag->resolveValue($definition->getArguments())));
+        $arguments = $this->doResolveServices($parameterBag->unescapeValue($parameterBag->resolveValue($definition->getArguments())), $inlinedDefinitions);
 
         if (null !== $id && $definition->isShared() && isset($this->services[$id]) && ($tryProxy || !$definition->isLazy())) {
             return $this->services[$id];
@@ -1021,7 +1025,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
 
         if (null !== $factory = $definition->getFactory()) {
             if (is_array($factory)) {
-                $factory = array($this->resolveServices($parameterBag->resolveValue($factory[0])), $factory[1]);
+                $factory = array($this->doResolveServices($parameterBag->resolveValue($factory[0]), $inlinedDefinitions), $factory[1]);
             } elseif (!is_string($factory)) {
                 throw new RuntimeException(sprintf('Cannot create service "%s" because of invalid factory', $id));
             }
@@ -1047,16 +1051,16 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
 
         if ($tryProxy || !$definition->isLazy()) {
             // share only if proxying failed, or if not a proxy
-            $this->shareService($definition, $service, $id);
+            $this->shareService($definition, $service, $id, $inlinedDefinitions);
         }
 
-        $properties = $this->resolveServices($parameterBag->unescapeValue($parameterBag->resolveValue($definition->getProperties())));
+        $properties = $this->doResolveServices($parameterBag->unescapeValue($parameterBag->resolveValue($definition->getProperties())), $inlinedDefinitions);
         foreach ($properties as $name => $value) {
             $service->$name = $value;
         }
 
         foreach ($definition->getMethodCalls() as $call) {
-            $this->callMethod($service, $call);
+            $this->callMethod($service, $call, $inlinedDefinitions);
         }
 
         if ($callable = $definition->getConfigurator()) {
@@ -1066,7 +1070,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
                 if ($callable[0] instanceof Reference) {
                     $callable[0] = $this->get((string) $callable[0], $callable[0]->getInvalidBehavior());
                 } elseif ($callable[0] instanceof Definition) {
-                    $callable[0] = $this->createService($callable[0], null);
+                    $callable[0] = $this->createService($callable[0], $inlinedDefinitions);
                 }
             }
 
@@ -1089,10 +1093,15 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      *               the real service instances and all expressions evaluated
      */
     public function resolveServices($value)
+    {
+        return $this->doResolveServices($value, new \SplObjectStorage());
+    }
+
+    private function doResolveServices($value, \SplObjectStorage $inlinedDefinitions)
     {
         if (is_array($value)) {
             foreach ($value as $k => $v) {
-                $value[$k] = $this->resolveServices($v);
+                $value[$k] = $this->doResolveServices($v, $inlinedDefinitions);
             }
         } elseif ($value instanceof ServiceClosureArgument) {
             $reference = $value->getValues()[0];
@@ -1137,7 +1146,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
         } elseif ($value instanceof Reference) {
             $value = $this->get((string) $value, $value->getInvalidBehavior());
         } elseif ($value instanceof Definition) {
-            $value = $this->createService($value, null);
+            $value = $this->createService($value, $inlinedDefinitions);
         } elseif ($value instanceof Expression) {
             $value = $this->getExpressionLanguage()->evaluate($value, array('container' => $this));
         }
@@ -1434,7 +1443,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
         return $this->proxyInstantiator;
     }
 
-    private function callMethod($service, $call)
+    private function callMethod($service, $call, \SplObjectStorage $inlinedDefinitions)
     {
         foreach (self::getServiceConditionals($call[1]) as $s) {
             if (!$this->has($s)) {
@@ -1447,7 +1456,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
             }
         }
 
-        call_user_func_array(array($service, $call[0]), $this->resolveServices($this->getParameterBag()->unescapeValue($this->getParameterBag()->resolveValue($call[1]))));
+        call_user_func_array(array($service, $call[0]), $this->doResolveServices($this->getParameterBag()->unescapeValue($this->getParameterBag()->resolveValue($call[1])), $inlinedDefinitions));
     }
 
     /**
@@ -1457,9 +1466,14 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
      * @param object      $service
      * @param string|null $id
      */
-    private function shareService(Definition $definition, $service, $id)
+    private function shareService(Definition $definition, $service, $id, \SplObjectStorage $inlinedDefinitions)
     {
-        if (null !== $id && $definition->isShared()) {
+        if (!$definition->isShared()) {
+            return;
+        }
+        if (null === $id) {
+            $inlinedDefinitions[$definition] = $service;
+        } else {
             $this->services[$id] = $service;
             unset($this->loading[$id], $this->alreadyLoading[$id]);
         }
diff --git a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
index c7af2c2e2c..2a0fdcc289 100644
--- a/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
+++ b/src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php
@@ -353,6 +353,7 @@ EOTXT
             if (isset($checkedNodes[$id])) {
                 continue;
             }
+            $checkedNodes[$id] = true;
 
             if ($node->getValue() && ($edge->isLazy() || $edge->isWeak())) {
                 // no-op
@@ -364,10 +365,8 @@ EOTXT
             } else {
                 $currentPath[$id] = $id;
                 $this->analyzeCircularReferences($node->getOutEdges(), $checkedNodes, $currentPath);
+                array_pop($currentPath);
             }
-
-            $checkedNodes[$id] = true;
-            array_pop($currentPath);
         }
     }
 
diff --git a/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php b/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php
index be71581497..936b13ea2a 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php
@@ -1051,6 +1051,28 @@ class ContainerBuilderTest extends TestCase
         $this->assertTrue($classInList);
     }
 
+    public function testInlinedDefinitions()
+    {
+        $container = new ContainerBuilder();
+
+        $definition = new Definition('BarClass');
+
+        $container->register('bar_user', 'BarUserClass')
+            ->addArgument($definition)
+            ->setProperty('foo', $definition);
+
+        $container->register('bar', 'BarClass')
+            ->setProperty('foo', $definition)
+            ->addMethodCall('setBaz', array($definition));
+
+        $barUser = $container->get('bar_user');
+        $bar = $container->get('bar');
+
+        $this->assertSame($barUser->foo, $barUser->bar);
+        $this->assertSame($bar->foo, $bar->getBaz());
+        $this->assertNotSame($bar->foo, $barUser->foo);
+    }
+
     public function testInitializePropertiesBeforeMethodCalls()
     {
         $container = new ContainerBuilder();
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/classes.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/classes.php
index ab07fadc25..bc653a744c 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/classes.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/includes/classes.php
@@ -9,7 +9,7 @@ function sc_configure($instance)
     $instance->configure();
 }
 
-class BarClass
+class BarClass extends BazClass
 {
     protected $baz;
     public $foo = 'foo';
diff --git a/src/Symfony/Component/Form/Extension/Core/Type/FileType.php b/src/Symfony/Component/Form/Extension/Core/Type/FileType.php
index b801101cba..b67736b0ec 100644
--- a/src/Symfony/Component/Form/Extension/Core/Type/FileType.php
+++ b/src/Symfony/Component/Form/Extension/Core/Type/FileType.php
@@ -34,8 +34,13 @@ class FileType extends AbstractType
 
             if ($options['multiple']) {
                 $data = array();
+                $files = $event->getData();
 
-                foreach ($event->getData() as $file) {
+                if (!is_array($files)) {
+                    $files = array();
+                }
+
+                foreach ($files as $file) {
                     if ($requestHandler->isFileUpload($file)) {
                         $data[] = $file;
                     }
diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/FileTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/FileTypeTest.php
index 8ac62c8dfb..5ba1dc5a51 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/FileTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/FileTypeTest.php
@@ -159,6 +159,24 @@ class FileTypeTest extends BaseTypeTest
         $this->assertCount(1, $form->getData());
     }
 
+    /**
+     * @dataProvider requestHandlerProvider
+     */
+    public function testSubmitNonArrayValueWhenMultiple(RequestHandlerInterface $requestHandler)
+    {
+        $form = $this->factory
+            ->createBuilder(static::TESTED_TYPE, null, array(
+                'multiple' => true,
+            ))
+            ->setRequestHandler($requestHandler)
+            ->getForm();
+        $form->submit(null);
+
+        $this->assertSame(array(), $form->getData());
+        $this->assertSame(array(), $form->getNormData());
+        $this->assertSame(array(), $form->getViewData());
+    }
+
     public function requestHandlerProvider()
     {
         return array(
diff --git a/src/Symfony/Component/Lock/Tests/Store/MemcachedStoreTest.php b/src/Symfony/Component/Lock/Tests/Store/MemcachedStoreTest.php
index eb030fba0f..f4ab571f56 100644
--- a/src/Symfony/Component/Lock/Tests/Store/MemcachedStoreTest.php
+++ b/src/Symfony/Component/Lock/Tests/Store/MemcachedStoreTest.php
@@ -26,7 +26,10 @@ class MemcachedStoreTest extends AbstractStoreTest
     {
         $memcached = new \Memcached();
         $memcached->addServer(getenv('MEMCACHED_HOST'), 11211);
-        if (false === $memcached->getStats()) {
+        $memcached->get('foo');
+        $code = $memcached->getResultCode();
+
+        if (\Memcached::RES_SUCCESS !== $code && \Memcached::RES_NOTFOUND !== $code) {
             self::markTestSkipped('Unable to connect to the memcache host');
         }
     }
diff --git a/src/Symfony/Component/Process/Tests/ProcessTest.php b/src/Symfony/Component/Process/Tests/ProcessTest.php
index 4dc52d36b8..8bcbd15933 100644
--- a/src/Symfony/Component/Process/Tests/ProcessTest.php
+++ b/src/Symfony/Component/Process/Tests/ProcessTest.php
@@ -1452,20 +1452,7 @@ Array
 )
 
 EOTXT;
-
-        if (\PHP_VERSION_ID >= 70200) {
-            $expected = <<<EOTXT
-Array
-(
-    [0] => Standard input code
-    [1] => a
-    [2] => 
-    [3] => b
-)
-
-EOTXT;
-        }
-        $this->assertSame($expected, $p->getOutput());
+        $this->assertSame($expected, str_replace('Standard input code', '-', $p->getOutput()));
     }
 
     public function provideEscapeArgument()
diff --git a/src/Symfony/Component/Security/Http/Firewall/ContextListener.php b/src/Symfony/Component/Security/Http/Firewall/ContextListener.php
index 67ce5cefaa..9593f8d3b4 100644
--- a/src/Symfony/Component/Security/Http/Firewall/ContextListener.php
+++ b/src/Symfony/Component/Security/Http/Firewall/ContextListener.php
@@ -43,7 +43,6 @@ class ContextListener implements ListenerInterface
     private $dispatcher;
     private $registered;
     private $trustResolver;
-    private $logoutOnUserChange = true;
 
     /**
      * @param TokenStorageInterface                     $tokenStorage