enum.scala:22: warning: match may not be exhaustive. It would fail on the following input: Some((x: Status.Status forSome x not in (Error, Processed, Rendering, Waiting)))

gistfile1.scala

object Status extends Enumeration {
  type Status = Value
  val Waiting = Value("waiting")
  val Rendering = Value("rendering")
  val Processed = Value("processed")
  val Error = Value("error")
}

object Main extends App {
  import Status._
  def foo(s: Status) = {
  s match {
      case Waiting =>
        println("A")
      case Rendering =>
        println("B")
      case Processed | Error =>
        println("C")
    }
  }
  def bar(s: Option[Status]) = {
	s match {
      case Some(Waiting) =>
        println("A")
      case Some(Rendering) =>
        println("B")
      case Some(Processed) | Some(Error) | None =>
        println("C")
    }
  }

  foo(Waiting)
  foo(Error)
  bar(Some(Rendering))
  bar(Some(Processed))
  bar(None)
}

https://issues.scala-lang.org/browse/SI-7206