Ruby 2.2.0-preview2 now available on Heroku

Change effective on 28 November 2014

Ruby v2.2.0 preview2 is now available on Heroku. To run your app using this preview version of Ruby, add the following ruby directive to your Gemfile:

ruby "2.2.0"

This fully replaces Ruby 2.2.0-preview1. If you were using that release, you’ll automatically be upgraded to Ruby 2.2.0-preview2.

Note: This version of Ruby is not suitable for production applications. However, it can be used to test that your application is ready for December release of Ruby 2.2.0 and to provide feedback to the Ruby core team.