bug #33648 [TwigBundle] fix accessing service arguments (xabbuh)

This PR was merged into the 5.0-dev branch.

Discussion
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[TwigBundle] fix accessing service arguments

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       |
| License       | MIT
| Doc PR        |

Commits
-------

6233cce fix accessing service arguments

src/Symfony/Bundle/TwigBundle/DependencyInjection/Compiler/ExtensionPass.php

@@ -41,7 +41,7 @@ public function process(ContainerBuilder $container)
 
         $viewDir = \dirname((new \ReflectionClass('Symfony\Bridge\Twig\Extension\FormExtension'))->getFileName(), 2).'/Resources/views';
         $templateIterator = $container->getDefinition('twig.template_iterator');
-        $templatePaths = $templateIterator->getArgument(2);
+        $templatePaths = $templateIterator->getArgument(1);
         $cacheWarmer = null;
         if ($container->hasDefinition('twig.cache_warmer')) {
             $cacheWarmer = $container->getDefinition('twig.cache_warmer');
@@ -70,7 +70,7 @@ public function process(ContainerBuilder $container)
             }
         }
 
-        $templateIterator->replaceArgument(2, $templatePaths);
+        $templateIterator->replaceArgument(1, $templatePaths);
         if ($cacheWarmer) {
             $container->getDefinition('twig.cache_warmer')->replaceArgument(2, $cacheWarmerPaths);
         }