CCE in `AnyStepper[Int].asJavaSeqStream`

[lrytz]

    val ssss = new AnyStepper[Int] {
      override def trySplit(): AnyStepper[Int] = null
      override def hasStep: Boolean = false
      override def nextStep(): Int = ???
      override def estimateSize: Long = Long.MaxValue
      override def characteristics: Int = 0
    }
    ssss.asJavaSeqStream.count()

java.lang.ClassCastException: scala.jdk.StreamConvertersTypingTest$$anon$1 cannot be cast to scala.collection.IntStepper

[lrytz]

(I'll take a look)