Gem.source_index is deprecated, use Specification. Should I re-install Gem or Rails?

Question

I\'m learning RoR on Ubuntu 11. Got the following message when I was trying to generate an app. Did I install something incorrectly?

$ rails generate control         


        

Answer 1

Try this:

sudo gem update bundler

This will update bundler to most recent version (currently 1.0.15). This will not generate the warning or at least in my case this was the cause of the warning.