Closure capturing temporary objects?

Clos.scala

// http://stackoverflow.com/questions/3956607/how-should-i-avoid-unintentionally-capturing-the-local-scope-in-function-literals
object Clos {
  def method: Iterator[Int] = {
    val huge = (1 to 2000000).toList
    val n = huge.last
    (1 to n).iterator map (_ + 1)
  }

  def gc() { println("GC!!"); Runtime.getRuntime.gc }

  def main(args:Array[String]) {
    val list = collection.mutable.ListBuffer[Iterator[Int]]()
    (1 to args(0).toInt) foreach { i => list += method }
    println(list.map(m => m.next).mkString(","))
    println(list.map(m => m.next).mkString(","))
  }
}