I just upgraded my project to 2.3.RC1 and now I'm getting this error, not sure if there's something new that I need to do now on my side or if there's something missing with the implementation of PdoSessionHandler:

_Fatal error: Uncaught exception 'InvalidArgumentException' with message '"Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler" requires PDO error mode attribute be set to throw Exceptions (i.e. $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION))' in /var/www/symfony23/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php:52 Stack trace: #0 /var/www/symfony23/app/cache/dev/appDevDebugProjectContainer.php(2545): Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler->_construct(Object(PDO), Array) #1 /var/www/symfony23/app/bootstrap.php.cache(152): appDevDebugProjectContainer->getSession_Handler_PdoService() #2 /var/www/symfony23/app/cache/dev/appDevDebugProjectContainer.php(2571): Symfony\Component\DependencyInjection\Container->get('session.handler...') #3 /var/www/symfony23/app/bootstrap.php.cache(152): appDevDebugProjectContainer->getSession_Storage_NativeService() #4 /var/www/symfony23/app/cache/dev/ap in /var/www/symfony23/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Storage/Handler/PdoSessionHandler.php on line 52

Regards