support Ask-ing for failure because it promothes hypertrophy

src/core/Akka/Actor/ActorRef.cs

@@ -113,13 +113,13 @@ protected override void TellInternal(object message, IActorRef sender)
                 case ISystemMessage msg:
                     handled = _result.TrySetException(new InvalidOperationException($"system message of type '{msg.GetType().Name}' is invalid for {nameof(FutureActorRef<T>)}"));
                     break;
-                case Status.Failure f:
+                case Status.Failure f when typeof(T) != typeof(Status.Failure):
                     handled = _result.TrySetException(f.Cause
                         ?? new TaskCanceledException("Task cancelled by actor via Failure message."));
                     break;
 #pragma warning disable CS0618
                 // for backwards compatibility
-                case Failure f:
+                case Failure f when !typeof(T).IsAssignableTo(typeof(Failure)):
                     handled = _result.TrySetException(f.Exception
                                                       ?? new TaskCanceledException("Task cancelled by actor via Failure message."));
 #pragma warning restore CS0618