Heckle with different ruby2ruby versions

1.2.2-output.log

☹  bundle update
Fetching gem metadata from http://rubygems.org/.......
Using ZenTest (4.8.1) 
Using RubyInline (3.9.0) 
Using sexp_processor (3.2.0) 
Using ParseTree (3.0.9) 
Using ruby2ruby (1.2.2) 
Using heckle (1.4.3) 
Using bundler (1.1.4) 
Your bundle is updated! Use `bundle show [gemname]` to see where a bundled gem is installed.

☺  bundle exec heckle Greeter
Timeout set to 5 seconds.
Initial tests pass. Let's rumble.

**********************************************************************
***  Greeter#greet loaded with 7 possible mutations
**********************************************************************

7 mutations remaining...
6 mutations remaining...
5 mutations remaining...
4 mutations remaining...
3 mutations remaining...
2 mutations remaining...
1 mutations remaining...

The following mutations didn't cause test failures:

--- original
+++ mutation
 def greet
-  raise("here") if (rand > 1)
+  raise("here") if (rand > 12)
   "Hi #{@person}!"
 end

--- original
+++ mutation
 def greet
-  raise("here") if (rand > 1)
+  raise("here") if nil
   "Hi #{@person}!"
 end

--- original
+++ mutation
 def greet
-  raise("here") if (rand > 1)
+  if (rand > 1) then
+    raise("\0349=\020xl5$\eA$\bM,Rh:7\bg00?#\v\025\016F$& V<\01780\020`\e(FYQ\023IK")
+  end
   "Hi #{@person}!"
 end

--- original
+++ mutation
 def greet
-  raise("here") if (rand > 1)
+  nil if (rand > 1)
   "Hi #{@person}!"
 end

Heckle Results:

Passed    :   0
Failed    :   1
Thick Skin:   0

Improve the tests and try again.

1.3.1-output.log

☹  bundle update
Fetching gem metadata from http://rubygems.org/.......
Using ZenTest (4.8.1) 
Using RubyInline (3.9.0) 
Using sexp_processor (3.2.0) 
Using ParseTree (3.0.9) 
Using ruby_parser (2.3.1) 
Using ruby2ruby (1.3.1)
Using heckle (1.4.3) 
Using bundler (1.1.4) 

☺  bundle exec heckle Greeter
Timeout set to 5 seconds.
Initial tests pass. Let's rumble.

**********************************************************************
***  Greeter#greet loaded with 7 possible mutations
**********************************************************************

7 mutations remaining...
6 mutations remaining...
/Users/moonglum/.rvm/gems/ruby-1.8.7-p358@heckling/gems/heckle-1.4.3/bin/../lib/heckle.rb:603:in `current_code': undefined method `translate' for Ruby2Ruby:Class (NoMethodError)
	from /Users/moonglum/.rvm/gems/ruby-1.8.7-p358@heckling/gems/heckle-1.4.3/bin/../lib/heckle.rb:202:in `record_passing_mutation'
	from /Users/moonglum/.rvm/gems/ruby-1.8.7-p358@heckling/gems/heckle-1.4.3/bin/../lib/heckle.rb:149:in `run_tests'
	from /Users/moonglum/.rvm/gems/ruby-1.8.7-p358@heckling/gems/heckle-1.4.3/bin/../lib/heckle.rb:173:in `validate'
	from /Users/moonglum/.rvm/rubies/ruby-1.8.7-p358/lib/ruby/1.8/timeout.rb:67:in `timeout'
	from /Users/moonglum/.rvm/rubies/ruby-1.8.7-p358/lib/ruby/1.8/timeout.rb:101:in `timeout'
	from /Users/moonglum/.rvm/gems/ruby-1.8.7-p358@heckling/gems/heckle-1.4.3/bin/../lib/heckle.rb:173:in `validate'
	from /Users/moonglum/.rvm/gems/ruby-1.8.7-p358@heckling/gems/heckle-1.4.3/bin/../lib/test_unit_heckler.rb:80:in `validate'
	from /Users/moonglum/.rvm/gems/ruby-1.8.7-p358@heckling/gems/heckle-1.4.3/bin/../lib/test_unit_heckler.rb:79:in `each'
	from /Users/moonglum/.rvm/gems/ruby-1.8.7-p358@heckling/gems/heckle-1.4.3/bin/../lib/test_unit_heckler.rb:79:in `validate'
	from /Users/moonglum/.rvm/gems/ruby-1.8.7-p358@heckling/gems/heckle-1.4.3/bin/heckle:95
	from /Users/moonglum/.rvm/gems/ruby-1.8.7-p358@heckling/bin/heckle:19:in `load'
	from /Users/moonglum/.rvm/gems/ruby-1.8.7-p358@heckling/bin/heckle:19
	from /Users/moonglum/.rvm/gems/ruby-1.8.7-p358@heckling/bin/ruby_noexec_wrapper:14

greeter.rb

class Greeter
  def initialize(person)
    @person = person
  end
  
  def greet
    if rand > 1; raise 'here' end
    "Hi #{@person}!"
  end
end

test_greeter.rb

require "test/unit"
require "./lib/greeter.rb"

class TestGreeter < Test::Unit::TestCase
  def test_greet
    @greeter = Greeter.new('Lucas')
    assert_equal 'Hi Lucas!', @greeter.greet
  end
end