How to Catch Future Exception in Game Structure 2.4

I am trying to figure out how to catch a future exception in a function called by an asynchronous action in Play Framework 2.4. However, the code I have using restore seems to never get executed. I always get an execution exception page, not an "Ok" response.

Action code:

def index = Action.async {
    cardRepo.getAll()
    .map {
      cards => Ok(views.html.cardlist(cards))
    }.recover{
      case e: Exception => Ok(e.getMessage)
    }
  }

      

        
        
        
      

    

The code in cardRepo.getAll (which I have programmed for a new Exception experiment to experiment with):

def getAll(): Future[Seq[Card]] = {

    implicit val cardFormat = Json.format[Card]

    val cards = collection.find(Json.obj())
      .cursor[Card]()
      .collect[Seq]()

    throw new Exception("OH DEAR")

    cards
  }

      

        
        
        
      

    

I've seen similar questions on Stack Overflow, but I can't see what I'm doing wrong.