Merge branch '4.0'

* 4.0:
  [HttpKernel] Better handling of legacy cache
  modify definitions only if the do exist
  [DI] Prevent a ReflectionException during cache:clear when the parent class doesn't exist
  [FrameworkBundle] Make MicroKernelTraitTest green
  don't override existing verbosity env var
  [HttpKernel] Read $_ENV when checking SHELL_VERBOSITY
  Remove unreachable code
  bumped Symfony version to 4.0.0
  Automatically enable the CSRF protection if CSRF manager exists
  updated VERSION for 4.0.0-RC2
  updated CHANGELOG for 4.0.0-RC2
  bumped Symfony version to 3.4.0
  adding checks for the expression language
  updated VERSION for 3.4.0-RC2
  updated CHANGELOG for 3.4.0-RC2

Author: xabbuh

CHANGELOG-4.0.md

@@ -7,6 +7,22 @@ in 4.0 minor versions.
 To get the diff for a specific change, go to https://github.com/symfony/symfony/commit/XXX where XXX is the change hash
 To get the diff between two versions, go to https://github.com/symfony/symfony/compare/v4.0.0...v4.0.1
 
+* 4.0.0-RC2 (2017-11-24)
+
+ * bug #25146 [DI] Dont resolve envs in service ids (nicolas-grekas)
+ * bug #25113 [Routing] Fix "config-file-relative" annotation loader resources (nicolas-grekas, sroze)
+ * bug #25065 [FrameworkBundle] Update translation commands to work with default paths (yceruto)
+ * bug #25109 Make debug:container search command case-insensitive (jzawadzki)
+ * bug #25121 [FrameworkBundle] Fix AssetsInstallCommand (nicolas-grekas)
+ * bug #25102 [Form] Fixed ContextErrorException in FileType (chihiro-adachi)
+ * bug #25130 [DI] Fix handling of inlined definitions by ContainerBuilder (nicolas-grekas)
+ * bug #25119 [DI] Fix infinite loop when analyzing references (nicolas-grekas)
+ * bug #25094 [FrameworkBundle][DX] Display a nice error message if an enabled component is missing (derrabus)
+ * bug #25100 [SecurityBundle] providerIds is undefined error when firewall provider is not specified (karser)
+ * bug #25100 [SecurityBundle] providerIds is undefined error when firewall provider is not specified (karser)
+ * bug #25100 [SecurityBundle] providerIds is undefined error when firewall provider is not specified (karser)
+ * bug #25097 [Bridge\PhpUnit] Turn "preserveGlobalState" to false by default, revert "Blacklist" removal (nicolas-grekas)
+
 * 4.0.0-RC1 (2017-11-21)
 
  * bug #25077 [Bridge/Twig] Let getFlashes starts the session (MatTheCat)

src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php

@@ -21,6 +21,7 @@
 use Symfony\Component\Form\Form;
 use Symfony\Component\Lock\Lock;
 use Symfony\Component\Lock\Store\SemaphoreStore;
+use Symfony\Component\Security\Csrf\CsrfTokenManagerInterface;
 use Symfony\Component\Serializer\Serializer;
 use Symfony\Component\Translation\Translator;
 use Symfony\Component\Validator\Validation;
@@ -109,7 +110,7 @@ private function addCsrfSection(ArrayNodeDefinition $rootNode)
         $rootNode
             ->children()
                 ->arrayNode('csrf_protection')
-                    ->canBeEnabled()
+                    ->{!class_exists(FullStack::class) && class_exists(CsrfTokenManagerInterface::class) ? 'canBeDisabled' : 'canBeEnabled'}()
                 ->end()
             ->end()
         ;

src/Symfony/Bundle/FrameworkBundle/Tests/Kernel/MicroKernelTraitTest.php

@@ -18,7 +18,7 @@ class MicroKernelTraitTest extends TestCase
 {
     public function test()
     {
-        $kernel = new ConcreteMicroKernel('test', true);
+        $kernel = new ConcreteMicroKernel('test', false);
         $kernel->boot();
 
         $request = Request::create('/');
@@ -31,7 +31,7 @@ public function test()
 
     public function testAsEventSubscriber()
     {
-        $kernel = new ConcreteMicroKernel('test', true);
+        $kernel = new ConcreteMicroKernel('test', false);
         $kernel->boot();
 
         $request = Request::create('/danger');

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

@@ -74,9 +74,6 @@ protected function processValue($value, $isRoot = false)
             if ($optionalBehavior = '?' === $type[0]) {
                 $type = substr($type, 1);
                 $optionalBehavior = ContainerInterface::IGNORE_ON_INVALID_REFERENCE;
-            } elseif ($optionalBehavior = '!' === $type[0]) {
-                $type = substr($type, 1);
-                $optionalBehavior = ContainerInterface::IGNORE_ON_UNINITIALIZED_REFERENCE;
             }
             if (is_int($key)) {
                 $key = $type;

src/Symfony/Component/DependencyInjection/Dumper/PhpDumper.php

@@ -375,7 +375,7 @@ private function collectLineage($class, array &$lineage)
         if (isset($lineage[$class])) {
             return;
         }
-        if (!$r = $this->container->getReflectionClass($class)) {
+        if (!$r = $this->container->getReflectionClass($class, false)) {
             return;
         }
         if ($this->container instanceof $class) {

src/Symfony/Component/DependencyInjection/Loader/XmlFileLoader.php

@@ -488,6 +488,10 @@ private function getArgumentsAsPhp(\DOMElement $node, $name, $file, $lowercase =
                     $arguments[$key] = new Reference($arg->getAttribute('id'), $invalidBehavior);
                     break;
                 case 'expression':
+                    if (!class_exists(Expression::class)) {
+                        throw new \LogicException(sprintf('The type="expression" attribute cannot be used without the ExpressionLanguage component. Try running "composer require symfony/expression-language".'));
+                    }
+
                     $arguments[$key] = new Expression($arg->nodeValue);
                     break;
                 case 'collection':

src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php

@@ -727,6 +727,10 @@ private function resolveServices($value, $file, $isParameter = false)
                 $value[$k] = $this->resolveServices($v, $file, $isParameter);
             }
         } elseif (is_string($value) && 0 === strpos($value, '@=')) {
+            if (!class_exists(Expression::class)) {
+                throw new \LogicException(sprintf('The "@=" expression syntax cannot be used without the ExpressionLanguage component. Try running "composer require symfony/expression-language".'));
+            }
+
             return new Expression(substr($value, 2));
         } elseif (is_string($value) && 0 === strpos($value, '@')) {
             if (0 === strpos($value, '@@')) {

src/Symfony/Component/DependencyInjection/Tests/Fixtures/ParentNotExists.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace Symfony\Component\DependencyInjection\Tests\Fixtures;
+
+class ParentNotExists extends \NotExists
+{
+}

src/Symfony/Component/DependencyInjection/Tests/Fixtures/containers/container_inline_requires.php

@@ -7,11 +7,13 @@
 use Symfony\Component\DependencyInjection\Dumper\PhpDumper;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\ParentNotExists;
 
 $container = new ContainerBuilder();
 
 $container->register(HotPath\C1::class)->addTag('container.hot_path')->setPublic(true);
 $container->register(HotPath\C2::class)->addArgument(new Reference(HotPath\C3::class))->setPublic(true);
 $container->register(HotPath\C3::class);
+$container->register(ParentNotExists::class)->setPublic(true);
 
 return $container;

src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/container_inline_requires.php

@@ -30,6 +30,7 @@ public function __construct()
 
         $this->services = $this->privates = array();
         $this->methodMap = array(
+            'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\ParentNotExists' => 'getParentNotExistsService',
             'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\includes\\HotPath\\C1' => 'getC1Service',
             'Symfony\\Component\\DependencyInjection\\Tests\\Fixtures\\includes\\HotPath\\C2' => 'getC2Service',
         );
@@ -67,6 +68,16 @@ public function getRemovedIds()
         );
     }
 
+    /**
+     * Gets the public 'Symfony\Component\DependencyInjection\Tests\Fixtures\ParentNotExists' shared service.
+     *
+     * @return \Symfony\Component\DependencyInjection\Tests\Fixtures\ParentNotExists
+     */
+    protected function getParentNotExistsService()
+    {
+        return $this->services['Symfony\Component\DependencyInjection\Tests\Fixtures\ParentNotExists'] = new \Symfony\Component\DependencyInjection\Tests\Fixtures\ParentNotExists();
+    }
+
     /**
      * Gets the public 'Symfony\Component\DependencyInjection\Tests\Fixtures\includes\HotPath\C1' shared service.
      *