Autocompletion with /** @var */ in closures

Hello everybody,

I don't know if it's a bug (if so I'll gladly make a real bug report) or just me, but I can't get autocompletion in a closure on the following kind of code :
It's written in a Symfony2 controller and use the Symfony2 DIC.

<?php
/** @var \MyBundle\Model\Checkout\Manager $manager */
$manager = $this->container->get('my_bundle.checkout_manager');

/** @var \Symfony\Component\EventDispatcher\EventDispatcherInterface $eventDispatcher */
$eventDispatcher = $this->container->get('event_dispatcher');

// Create an event listener for the cart update
$eventDispatcher->addListener('cart.update', function() use ($manager) {
    $manager->onCartUpdate(); // no autocompletion here on $manager and the method ->onCartUpdate is not recognized.
});
?>

But if I duplicate the /** @var */ comment inside the closure, then it works. Example:

<?php
/** @var \MyBundle\Model\Checkout\Manager $manager */
$manager = $this->container->get('my_bundle.checkout_manager');

/** @var \Symfony\Component\EventDispatcher\EventDispatcherInterface $eventDispatcher */
$eventDispatcher = $this->container->get('event_dispatcher');

// Create an event listener for the cart update
$eventDispatcher->addListener('cart.update', function() use ($manager) {

    /** @var \MyBundle\Model\Checkout\Manager $manager */
    $manager->onCartUpdate(); // works fine !
});
?>


Do you guys have any clue why?
Thanks for your support.