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import scala.collection.mutable._
trait BugTrack {
trait B[+T]
val cache : HashMap[A[_], B[_]] = HashMap.empty
def A[T](f: Int => B[T]): A[T]
= new A[T]{def apply(in: Int) = f(in)}
abstract class A[+T] extends (Int => B[T]) {
def giveMeSame = this
}
def amethod[T](p: =>A[T]): A[T] = A(in => cache.get(p) match {
case Some(res) => res
case None => p(in)
}).giveMeSame.asInstanceOf[A[T]]
}
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