Unable to reference PHP DI dependencies in Symfony 3.1

[pevdh]

First of all, thank you for this very useful bridge!

I am trying to use the Symfony bridge with Symfony 3.1, but I ran into an issue where I seem to be unable to reference to PHP DI dependencies from the Symfony services.yml configuration file.

This is my services.yml configuration file (as suggested in the docs):

services:
    app.page_layout_extension:
        class: AppBundle\Twig\PageLayoutExtension
        arguments:
            - 'AppBundle\Layout\PageLayoutFactory'
            - 'AppBundle\Service\ContentBlockService'
        tags:
            - {name: twig.extension}

The signature of the PageLayoutExtension constructor is public function __construct(PageLayoutFactory $pageLayoutFactory, ContentBlockService $contentBlockService)

This configuration yields the following error:

PHP Fatal error:  Uncaught Symfony\Component\Debug\Exception\FatalThrowableError: Type error: Argument 1 passed to AppBundle\Twig\PageLayoutExtension::__construct() must be an instance of AppBundle\Layout\PageLayoutFactory, string given, called in /var/cache/dev/appDevDebugProjectContainer.php on line 300 in /src/AppBundle/Twig/PageLayoutExtension.php:23
Stack trace:
#0 /var/cache/dev/appDevDebugProjectContainer.php(300): AppBundle\Twig\PageLayoutExtension->__construct('AppBundle\\Layou...', 'AppBundle\\Servi...')
#1 /vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/Container.php(275): appDevDebugProjectContainer->getApp_PageLayoutExtensionService()
#2 /vendor/php-di/symfony-bridge/src/SymfonyContainerBridge.php(93): Symfony\Component\DependencyInjection\Container->get('app.page_layout...', 1)
#3 /vendor/php-di/symfony-bridge/src/SymfonyContainer in /src/AppBundle/Twig/PageLayoutExtension.php on line 23

Upon inspection, this error is caused by this line in appDevDebugContainer.php:

return $this->services['app.page_layout_extension'] = new \AppBundle\Twig\PageLayoutExtension('AppBundle\\Layout\\PageLayoutFactory', 'AppBundle\\Service\\ContentBlockService');

Which makes the error obvious. This line should read:

return $this->services['app.page_layout_extension'] = new \AppBundle\Twig\PageLayoutExtension($this->get('AppBundle\\Layout\\PageLayoutFactory'), $this->get('AppBundle\\Service\\ContentBlockService'));

Looking into the issue, I came across the following suggested modification of services.yml (forgot where I read it):

services:
    app.page_layout_extension:
        class: AppBundle\Twig\PageLayoutExtension
        arguments:
            - '@AppBundle\Layout\PageLayoutFactory'
            - '@AppBundle\Service\ContentBlockService'
        tags:
            - {name: twig.extension}

However, this makes that same appDevDebugContainer.php line translate to:

return $this->services['app.page_layout_extension'] = new \AppBundle\Twig\PageLayoutExtension($this->get('appbundle\layout\pagelayoutfactory'), $this->get('appbundle\service\contentblockservice'));

(Note the lowercase service names). Which is clearly wrong as well.

Am I missing something or is this new "functionality" of Symfony's container? Are there any workarounds?