diff --git a/src/Symfony/Bridge/Twig/Command/LintCommand.php b/src/Symfony/Bridge/Twig/Command/LintCommand.php
index 545ddcebe2..3581641d2d 100644
--- a/src/Symfony/Bridge/Twig/Command/LintCommand.php
+++ b/src/Symfony/Bridge/Twig/Command/LintCommand.php
@@ -202,7 +202,7 @@ EOF
             }
         });
 
-        $output->writeln(json_encode($filesInfo, JSON_PRETTY_PRINT));
+        $output->writeln(json_encode($filesInfo, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES));
 
         return min($errors, 1);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Command/YamlLintCommand.php b/src/Symfony/Bundle/FrameworkBundle/Command/YamlLintCommand.php
index 46fbc9204a..19195674c0 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Command/YamlLintCommand.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Command/YamlLintCommand.php
@@ -157,7 +157,7 @@ EOF
             }
         });
 
-        $output->writeln(json_encode($filesInfo, JSON_PRETTY_PRINT));
+        $output->writeln(json_encode($filesInfo, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES));
 
         return min($errors, 1);
     }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_attributes.html.php b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_attributes.html.php
index 8d2d6d7fd6..18f8368dc8 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_attributes.html.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/views/Form/choice_attributes.html.php
@@ -1,4 +1,3 @@
-id="<?php echo $view->escape($id) ?>" name="<?php echo $view->escape($full_name) ?>"
 <?php if ($disabled): ?>disabled="disabled" <?php endif ?>
 <?php foreach ($choice_attr as $k => $v): ?>
 <?php if ($v === true): ?>
diff --git a/src/Symfony/Component/Config/FileLocator.php b/src/Symfony/Component/Config/FileLocator.php
index c6600c7783..4816724c81 100644
--- a/src/Symfony/Component/Config/FileLocator.php
+++ b/src/Symfony/Component/Config/FileLocator.php
@@ -57,7 +57,7 @@ class FileLocator implements FileLocatorInterface
         $filepaths = array();
 
         foreach ($paths as $path) {
-            if (file_exists($file = $path.DIRECTORY_SEPARATOR.$name)) {
+            if (@file_exists($file = $path.DIRECTORY_SEPARATOR.$name)) {
                 if (true === $first) {
                     return $file;
                 }
diff --git a/src/Symfony/Component/Console/Application.php b/src/Symfony/Component/Console/Application.php
index 153653696e..38f38e2023 100644
--- a/src/Symfony/Component/Console/Application.php
+++ b/src/Symfony/Component/Console/Application.php
@@ -354,7 +354,7 @@ class Application
      * Adds an array of command objects.
      *
      * If a Command is not enabled it will not be added.
-     * 
+     *
      * @param Command[] $commands An array of commands
      */
     public function addCommands(array $commands)
@@ -782,6 +782,7 @@ class Application
 
         if (true === $input->hasParameterOption(array('--quiet', '-q'), true)) {
             $output->setVerbosity(OutputInterface::VERBOSITY_QUIET);
+            $input->setInteractive(false);
         } else {
             if ($input->hasParameterOption('-vvv', true) || $input->hasParameterOption('--verbose=3', true) || $input->getParameterOption('--verbose', false, true) === 3) {
                 $output->setVerbosity(OutputInterface::VERBOSITY_DEBUG);
diff --git a/src/Symfony/Component/Console/Tests/ApplicationTest.php b/src/Symfony/Component/Console/Tests/ApplicationTest.php
index 3e9193c701..a1c98cf27a 100644
--- a/src/Symfony/Component/Console/Tests/ApplicationTest.php
+++ b/src/Symfony/Component/Console/Tests/ApplicationTest.php
@@ -639,9 +639,11 @@ class ApplicationTest extends \PHPUnit_Framework_TestCase
 
         $tester->run(array('command' => 'list', '--quiet' => true));
         $this->assertSame('', $tester->getDisplay(), '->run() removes all output if --quiet is passed');
+        $this->assertFalse($tester->getInput()->isInteractive(), '->run() sets off the interactive mode if --quiet is passed');
 
         $tester->run(array('command' => 'list', '-q' => true));
         $this->assertSame('', $tester->getDisplay(), '->run() removes all output if -q is passed');
+        $this->assertFalse($tester->getInput()->isInteractive(), '->run() sets off the interactive mode if -q is passed');
 
         $tester->run(array('command' => 'list', '--verbose' => true));
         $this->assertSame(Output::VERBOSITY_VERBOSE, $tester->getOutput()->getVerbosity(), '->run() sets the output to verbose if --verbose is passed');
diff --git a/src/Symfony/Component/Form/PreloadedExtension.php b/src/Symfony/Component/Form/PreloadedExtension.php
index 5b49e353b7..c9ab2bccaf 100644
--- a/src/Symfony/Component/Form/PreloadedExtension.php
+++ b/src/Symfony/Component/Form/PreloadedExtension.php
@@ -14,7 +14,7 @@ namespace Symfony\Component\Form;
 use Symfony\Component\Form\Exception\InvalidArgumentException;
 
 /**
- * A form extension with preloaded types, type exceptions and type guessers.
+ * A form extension with preloaded types, type extensions and type guessers.
  *
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
diff --git a/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php b/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
index 8e33726896..25edbed147 100644
--- a/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
+++ b/src/Symfony/Component/Form/Tests/AbstractLayoutTest.php
@@ -620,8 +620,8 @@ abstract class AbstractLayoutTest extends \Symfony\Component\Form\Test\FormInteg
     [@class="bar&baz"]
     [not(@required)]
     [
-        ./option[@value="&a"][@selected="selected"][.="[trans]Choice&A[/trans]"]
-        /following-sibling::option[@value="&b"][not(@class)][not(@selected)][.="[trans]Choice&B[/trans]"]
+        ./option[@value="&a"][@selected="selected"][.="[trans]Choice&A[/trans]"][not(@id)][not(@name)]
+        /following-sibling::option[@value="&b"][not(@class)][not(@selected)][.="[trans]Choice&B[/trans]"][not(@id)][not(@name)]
     ]
     [count(./option)=2]
 '
diff --git a/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php b/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
index 084d732ef4..f5fe436379 100644
--- a/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
+++ b/src/Symfony/Component/HttpKernel/Controller/ControllerResolver.php
@@ -27,6 +27,15 @@ class ControllerResolver implements ArgumentResolverInterface, ControllerResolve
 {
     private $logger;
 
+    /**
+     * If the ...$arg functionality is available.
+     *
+     * Requires at least PHP 5.6.0 or HHVM 3.9.1
+     *
+     * @var bool
+     */
+    private $supportsVariadic;
+
     /**
      * Constructor.
      *
@@ -35,6 +44,8 @@ class ControllerResolver implements ArgumentResolverInterface, ControllerResolve
     public function __construct(LoggerInterface $logger = null)
     {
         $this->logger = $logger;
+
+        $this->supportsVariadic = method_exists('ReflectionParameter', 'isVariadic');
     }
 
     /**
@@ -104,6 +115,12 @@ class ControllerResolver implements ArgumentResolverInterface, ControllerResolve
     }
 
     /**
+     * @param Request                $request
+     * @param callable               $controller
+     * @param \ReflectionParameter[] $parameters
+     *
+     * @return array The arguments to use when calling the action
+     *
      * @deprecated This method is deprecated as of 3.1 and will be removed in 4.0. Implement the ArgumentResolverInterface and inject it in the HttpKernel instead.
      */
     protected function doGetArguments(Request $request, $controller, array $parameters)
@@ -114,7 +131,7 @@ class ControllerResolver implements ArgumentResolverInterface, ControllerResolve
         $arguments = array();
         foreach ($parameters as $param) {
             if (array_key_exists($param->name, $attributes)) {
-                if (PHP_VERSION_ID >= 50600 && $param->isVariadic() && is_array($attributes[$param->name])) {
+                if ($this->supportsVariadic && $param->isVariadic() && is_array($attributes[$param->name])) {
                     $arguments = array_merge($arguments, array_values($attributes[$param->name]));
                 } else {
                     $arguments[] = $attributes[$param->name];
@@ -123,6 +140,8 @@ class ControllerResolver implements ArgumentResolverInterface, ControllerResolve
                 $arguments[] = $request;
             } elseif ($param->isDefaultValueAvailable()) {
                 $arguments[] = $param->getDefaultValue();
+            } elseif ($param->allowsNull()) {
+                $arguments[] = null;
             } else {
                 if (is_array($controller)) {
                     $repr = sprintf('%s::%s()', get_class($controller[0]), $controller[1]);
diff --git a/src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php b/src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php
index 7daf0daa29..a1b9a1c78d 100644
--- a/src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/Controller/ControllerResolverTest.php
@@ -13,6 +13,7 @@ namespace Symfony\Component\HttpKernel\Tests\Controller;
 
 use Psr\Log\LoggerInterface;
 use Symfony\Component\HttpKernel\Controller\ControllerResolver;
+use Symfony\Component\HttpKernel\Tests\Fixtures\Controller\NullableController;
 use Symfony\Component\HttpKernel\Tests\Fixtures\Controller\VariadicController;
 use Symfony\Component\HttpFoundation\Request;
 
@@ -226,6 +227,34 @@ class ControllerResolverTest extends \PHPUnit_Framework_TestCase
         $mock->getController($request);
     }
 
+    /**
+     * @requires PHP 7.1
+     */
+    public function testGetNullableArguments()
+    {
+        $resolver = new ControllerResolver();
+
+        $request = Request::create('/');
+        $request->attributes->set('foo', 'foo');
+        $request->attributes->set('bar', new \stdClass());
+        $request->attributes->set('mandatory', 'mandatory');
+        $controller = array(new NullableController(), 'action');
+        $this->assertEquals(array('foo', new \stdClass(), 'value', 'mandatory'), $resolver->getArguments($request, $controller));
+    }
+
+    /**
+     * @requires PHP 7.1
+     */
+    public function testGetNullableArgumentsWithDefaults()
+    {
+        $resolver = new ControllerResolver();
+
+        $request = Request::create('/');
+        $request->attributes->set('mandatory', 'mandatory');
+        $controller = array(new NullableController(), 'action');
+        $this->assertEquals(array(null, null, 'value', 'mandatory'), $resolver->getArguments($request, $controller));
+    }
+
     protected function createControllerResolver(LoggerInterface $logger = null)
     {
         return new ControllerResolver($logger);
diff --git a/src/Symfony/Component/HttpKernel/Tests/Fixtures/Controller/NullableController.php b/src/Symfony/Component/HttpKernel/Tests/Fixtures/Controller/NullableController.php
new file mode 100644
index 0000000000..9db4df7b4c
--- /dev/null
+++ b/src/Symfony/Component/HttpKernel/Tests/Fixtures/Controller/NullableController.php
@@ -0,0 +1,19 @@
+<?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\HttpKernel\Tests\Fixtures\Controller;
+
+class NullableController
+{
+    public function action(?string $foo, ?\stdClass $bar, ?string $baz = 'value', $mandatory)
+    {
+    }
+}