Ruby 1.8.5 is installed by default in Ubuntu Feisty, this version presents some problems when you try to program with Rails. If you want to debug your application using breakpointers, Webrick will abort showing the following message:
Breakpoints are not currently working with Ruby 1.8.5 RAILS_ROOT: script/../config/.. Application Trace | Framework Trace | Full Trace vendor/rails/railties/lib/breakpoint.rb:21:in `of_caller' vendor/rails/railties/lib/breakpoint.rb:543:in `breakpoint' app/controllers/books_controller.rb:19:in `show'
In order to avoid this problem, I’ve downgraded my ruby version to the one used in Edgy (the previous version of Ubuntu). Concretely, it is necessary to downgrade this packages:
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