Worst case scenario for `Nondeterminism[Future]`.

WorstCastScenario.scala

// This bombs with a SOE
object Main extends App {
  val F = Nondeterminism[Future]
  val N = 10000
  val worstCaseScenario =
    (0 until N).foldLeft(Future { Thread.sleep(50000) })((a,b) =>
      F.both(a, F.point(b)).map(_._1)
    )
  worstCaseScenario.run
}