From d9bd43a1fa11d44fb60b7dfe6dd8f3f3c213aeaa Mon Sep 17 00:00:00 2001
From: Patrik Nordwall <patrik.nordwall@gmail.com>
Date: Fri, 31 Aug 2012 12:57:33 +0200
Subject: [PATCH] Avoid / by zero in SmallestMailboxRouter also, see #2442

---
 akka-actor/src/main/scala/akka/routing/Routing.scala | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/akka-actor/src/main/scala/akka/routing/Routing.scala b/akka-actor/src/main/scala/akka/routing/Routing.scala
index dcd9c1cbd4..c8115b42c2 100644
--- a/akka-actor/src/main/scala/akka/routing/Routing.scala
+++ b/akka-actor/src/main/scala/akka/routing/Routing.scala
@@ -859,7 +859,9 @@ trait SmallestMailboxLike { this: RouterConfig ⇒
                          currentScore: Long = Long.MaxValue,
                          at: Int = 0,
                          deep: Boolean = false): ActorRef =
-      if (at >= targets.size) {
+      if (targets.isEmpty)
+        routeeProvider.context.system.deadLetters
+      else if (at >= targets.size) {
         if (deep) {
           if (proposedTarget.isTerminated) targets(ThreadLocalRandom.current.nextInt(targets.size)) else proposedTarget
         } else getNext(targets, proposedTarget, currentScore, 0, deep = true)