File: lazy-leaks.scala

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scala 2.11.12-4
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class Lazy(f: => Int) {
     lazy val get: Int = f
}

object Test extends App
{
     val buffer = new scala.collection.mutable.ListBuffer[Lazy]

     // This test requires 4 Mb of RAM if Lazy is discarding thunks
     // It consumes 4 Gb of RAM if Lazy is not discarding thunks

     for (idx <- Iterator.range(0, 1024)) {
         val data = new Array[Int](1024*1024)
         val lz: Lazy = new Lazy(data.length)
         buffer += lz
         lz.get
     }
}