arsduo/koala — pull request #379 by petergoldstein (2014-06-05 06:09:09+00:00)
Title: Switch to byebug for MRI Ruby 2.0 and 2.1

The latest version of MRI Ruby 2.1 is not supported by debugger. Switching MRI Ruby 2.0 and 2.1 to use byebug.