symfony: [Doctrine] problem with events

SF 2.3.1 events doesn’t work, because appDevDebugProjectContainer has extra lines after return tag:

    protected function getDoctrine_Dbal_DefaultConnectionService()
    {
        $a = new \Doctrine\DBAL\Logging\LoggerChain();
        $a->addLogger(new \Symfony\Bridge\Doctrine\Logger\DbalLogger($this->get('monolog.logger.doctrine', ContainerInterface::NULL_ON_INVALID_REFERENCE), $this->get('debug.stopwatch', ContainerInterface::NULL_ON_INVALID_REFERENCE)));
        $a->addLogger($this->get('doctrine.dbal.logger.profiling.default'));

        $b = new \Doctrine\DBAL\Configuration();
        $b->setSQLLogger($a);

        $c = new \Symfony\Bridge\Doctrine\ContainerAwareEventManager($this);

        return $this->services['doctrine.dbal.default_connection'] = $this->get('doctrine.dbal.connection_factory')->createConnection(array('dbname' => 'test', 'host' => '127.0.0.1', 'port' => NULL, 'user' => 'test', 'password' => 'test', 'charset' => 'UTF8', 'driver' => 'pdo_mysql', 'driverOptions' => array()), $b, $c, array());
        $c->addEventSubscriber(new \FOS\UserBundle\Entity\UserListener($this));
        $c->addEventListener(array(0 => 'prePersist'), $this->get('test_listener'));
    }