Pickling 0.8.0-SNAPSHOT fails with out-of-mem error when trying to compile this...

pickling-test.scala

import scala.pickling._
import json._


package testclasses {
    sealed trait A
    case class A1(b: B) extends A
    case class A2(b: B) extends A
    case class A3(b: B) extends A
    case class A4(ab: Array[B]) extends A
    case class A5(ab: Array[B]) extends A
    case class A6(ab: Array[B]) extends A

    sealed trait B
    case class B1(c: C) extends B
    case class B2(c: C) extends B
    case class B3(c: C) extends B
    case class B4(ac: Array[C]) extends B
    case class B5(ac: Array[C]) extends B
    case class B6(ac: Array[C]) extends B

    sealed trait C
    case class C1(d: D) extends C
    case class C2(d: D) extends C
    case class C3(d: D) extends C
    case class C4(ad: Array[D]) extends C
    case class C5(ad: Array[D]) extends C
    case class C6(ad: Array[D]) extends C

    sealed trait D
    case class D1(i: Int) extends D
    case class D2(s: String) extends D
    case class D3(b: Boolean) extends D
    case class D4(ai: Array[Int]) extends D
    case class D5(as: Array[String]) extends D
    case class D6(ab: Array[Boolean]) extends D
}


import testclasses._

object Jsonify {
    def toJson(t: A) = t.pickle.value
    def fromJson(s: String) = toJSONPickle(s).unpickle[A]
}

pickling-test2.scala

import scala.pickling._
import json._


package testclasses {
    sealed trait A
    case class A1(b: B) extends A
    case class A2(b: B) extends A
    case class A3(b: B) extends A
    case class A4(b: B) extends A
    case class A5(b: B) extends A
    case class A6(b: B) extends A

    sealed trait B
    case class B1(c: C) extends B
    case class B2(c: C) extends B
    case class B3(c: C) extends B
    case class B4(c: C) extends B
    case class B5(c: C) extends B
    case class B6(c: C) extends B

    sealed trait C
    case class C1(d: D) extends C
    case class C2(d: D) extends C
    case class C3(d: D) extends C
    case class C4(d: D) extends C
    case class C5(d: D) extends C
    case class C6(d: D) extends C

    sealed trait D
    case class D1() extends D
    case class D2() extends D
    case class D3() extends D
    case class D4() extends D
    case class D5() extends D
    case class D6() extends D
}


import testclasses._

object Jsonify {
    def toJson(t: A) = t.pickle.value
    def fromJson(s: String) = toJSONPickle(s).unpickle[A]
}