JRuby enum spec bug

enum_spec.rb

require 'spec_helper'

def check_iter(iter, first)
  raise "bad first element on first peek, #{iter.peek.id} != #{first.id}" unless iter.peek.id == first.id
  raise "bad first element on second peek" unless iter.peek.id == first.id
  raise "bad first element on next" unless iter.next.id == first.id
end

describe 'Enumerator' do
  context 'with a single value in an AR array' do
    it 'should not hang' do
      obj = FactoryBot.create :device

      collection = Models::Device.all.to_a
      check_iter(collection.each, obj)

      collection = Models::Device.all.to_a
      check_iter(collection.to_enum, obj)

      collection = Models::Device.all
      check_iter(collection.each, obj)

      collection = Models::Device.all
      # This one fails
      check_iter(collection.to_enum, obj)
    end
  end
end