Memory (and classes) leak in neo4jrb

leak.rb

#!/usr/bin/env ruby -J-Xmn512m -J-Xms2048m -J-Xmx2048m

# Profile these different versions (e.g. with VisualVM)
# jruby 1.5.6: watch the number of classes rise with every iteration. Eventually PermGen space will be exhausted.
# jruby 1.6.0.rc1: the classes get garbage collected regularly.

require "rubygems"
require 'neo4j' #1.0.0.beta.26

class Node
  include Neo4j::NodeMixin
  property :user_id
  has_n(:contacts)
end

node1 = nil
Neo4j::Transaction.run do
  node1 = Node.new(:user_id => 1)
end

for node_id in 2..100000
  Neo4j::Transaction.run do
    node = Node.new(:user_id => node_id)
    node.contacts << node1
    puts node.contacts.include?(node1)
  end
end