Trying to reproduce http://stackoverflow.com/questions/43585498/akka-unstashall-generate-java-lang-nullpointerexception

StashFailApp.scala

import akka.actor.{Actor, ActorSystem, Props, Stash}

class MyActor extends Actor with Stash {

  def receive = {
    case _ =>
      unstashAll()
      println("after unstashAll")
  }
}

object StashFailApp extends App {

  val system = ActorSystem()
  val ref = system.actorOf(Props(classOf[MyActor]))
  ref ! "boom"
  ref ! "bang"
  ref ! "kaboom"

}