Akka Props are a closure?

Sender.scala

// It seems like Props is a closure that gets reused? The first pass will work.
// The next will cause the BatchUpdate Actor to send deadLetters. As if the sender
// terminated prematurely.

query {
        Rows(multiStoryQuery(revs.map(_._1)).list)
      } pipeTo context.actorOf(Props(new BatchUpdate(context.sender(), revs)), s"batch-update-story-${Math.abs(Random.nextInt())}")

// This works however. So the problem actually seems to be that successive iterations of the above
// version go to the same (now stopped) passed sender.

val sender = context.sender()

query {
        Rows(multiStoryQuery(revs.map(_._1)).list)
      } pipeTo context.actorOf(Props(new BatchUpdate(sender, revs)), s"batch-update-story-${Math.abs(Random.nextInt())}")

NOTE, here's an apparent explanation: http://letitcrash.com/post/49001044816/2-2-spotlight-deprecation-of-closure-taking-props