Merge branch '4.3' into 4.4

* 4.3:
  Revert "bug #31620 [FrameworkBundle] Inform the user when save_path will be ignored (gnat42)"
  [Form][PropertyPathMapper] Avoid extra call to get config
  [HttpKernel] remove unused fixtures

Author: nicolas-grekas

DependencyInjection/Configuration.php

@@ -522,12 +522,6 @@ private function addSessionSection(ArrayNodeDefinition $rootNode)
         $rootNode
             ->children()
                 ->arrayNode('session')
-                    ->validate()
-                        ->ifTrue(function ($v) {
-                            return empty($v['handler_id']) && !empty($v['save_path']);
-                        })
-                        ->thenInvalid('Session save path is ignored without a handler service')
-                    ->end()
                     ->info('session configuration')
                     ->canBeEnabled()
                     ->children()
@@ -553,7 +547,7 @@ private function addSessionSection(ArrayNodeDefinition $rootNode)
                         ->scalarNode('gc_divisor')->end()
                         ->scalarNode('gc_probability')->defaultValue(1)->end()
                         ->scalarNode('gc_maxlifetime')->end()
-                        ->scalarNode('save_path')->end()
+                        ->scalarNode('save_path')->defaultValue('%kernel.cache_dir%/sessions')->end()
                         ->integerNode('metadata_update_threshold')
                             ->defaultValue(0)
                             ->info('seconds to wait between 2 session metadata updates')

DependencyInjection/FrameworkExtension.php

@@ -916,22 +916,13 @@ private function registerSessionConfiguration(array $config, ContainerBuilder $c
 
         // session handler (the internal callback registered with PHP session management)
         if (null === $config['handler_id']) {
-            // If the user set a save_path without using a non-default \SessionHandler, it will silently be ignored
-            if (isset($config['save_path'])) {
-                throw new LogicException('Session save path is ignored without a handler service');
-            }
-
             // Set the handler class to be null
             $container->getDefinition('session.storage.native')->replaceArgument(1, null);
             $container->getDefinition('session.storage.php_bridge')->replaceArgument(0, null);
         } else {
             $container->setAlias('session.handler', $config['handler_id'])->setPrivate(true);
         }
 
-        if (!isset($config['save_path'])) {
-            $config['save_path'] = ini_get('session.save_path');
-        }
-
         $container->setParameter('session.save_path', $config['save_path']);
 
         $container->setParameter('session.metadata.update_threshold', $config['metadata_update_threshold']);

Tests/DependencyInjection/ConfigurationTest.php

@@ -294,6 +294,7 @@ protected static function getBundleDefaultConfig()
                 'cookie_httponly' => true,
                 'cookie_samesite' => null,
                 'gc_probability' => 1,
+                'save_path' => '%kernel.cache_dir%/sessions',
                 'metadata_update_threshold' => 0,
             ],
             'request' => [

Tests/DependencyInjection/Fixtures/php/session_savepath.php

@@ -554,12 +554,6 @@ public function testNullSessionHandler()
         $this->assertEquals($expected, array_keys($container->getDefinition('session_listener')->getArgument(0)->getValues()));
     }
 
-    public function testNullSessionHandlerWithSavePath()
-    {
-        $this->expectException('Symfony\Component\Config\Definition\Exception\InvalidConfigurationException');
-        $this->createContainerFromFile('session_savepath');
-    }
-
     public function testRequest()
     {
         $container = $this->createContainerFromFile('full');