iterateUntil,iterateUntilM: MatchError

[Crafter6432]

scala.MatchError: Some(...) (of class scala.Some) at io.iteratee.Enumerator$$anon$18.io$iteratee$Enumerator$$anon$$loop(Enumerator.scala:224) at io.iteratee.Enumerator$$anon$18.apply(Enumerator.scala:228) at io.iteratee.Enumerator$$anon$3$$anonfun$apply$2.apply(Enumerator.scala:32) at io.iteratee.Enumerator$$anon$3$$anonfun$apply$2.apply(Enumerator.scala:32) at scala.concurrent.Future$$anonfun$flatMap$1.apply(Future.scala:251) at scala.concurrent.Future$$anonfun$flatMap$1.apply(Future.scala:249) at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)