[FWBundle] Automatically enable PropertyInfo when using Flex

Author: dunglas

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\PropertyInfo\PropertyInfoExtractor;
 use Symfony\Component\Security\Csrf\CsrfTokenManagerInterface;
 use Symfony\Component\Serializer\Serializer;
 use Symfony\Component\Translation\Translator;
@@ -823,7 +824,7 @@ private function addPropertyInfoSection(ArrayNodeDefinition $rootNode)
             ->children()
                 ->arrayNode('property_info')
                     ->info('Property info configuration')
-                    ->canBeEnabled()
+                    ->{!class_exists(FullStack::class) && class_exists(PropertyInfoExtractor::class) ? 'canBeDisabled' : 'canBeEnabled'}()
                 ->end()
             ->end()
         ;