Scala pickle cannot handle classes with cyclic references

[markehammons]

import scala.pickling._
import json._

object Test extends App {
        val x = (new X).pickle
        println(x)
        x.unpickle[X]
}


class X {
        var y = new Y(this)
}


class Y(val x: X) {}

The above class will cause an out of memory error.

[heathermiller]

Good catch! This is a known limitation, that we're currently working to resolve. We've actually got a hard, non-negotiable deadline to resolve this within the month. So stay tuned– we've got a solution for this in the works.

[phaller]

FYI, this has been resolved in the "oopsla2013" branch:
https://github.com/scala/pickling/tree/oopsla2013

This will be integrated into the main branches soon.

[heathermiller]

All of this is now in the main 2.10.x branch, so marking as fixed :)

(Our OOPSLA paper was updated with details regarding this, in the event that you're interested in the nitty gritty: Instant Pickles: Generating Object-Oriented Pickler Combinators for Fast and Extensible Serialization)