Ruby cannot find 'bundler/setup'?

I have ruby 1.9.2 and rails 3.1.0 on my Ubuntu machine. In my rails app -> config/boot.rb , there is a require 'bundler/setup' statement, however ruby cannot find this 'bundler/setup.rb', I have tried to locate this file, and this file exists in the folder /usr/lib/ruby/gems/1.8/gems/bundler-1.0.21/lib/bundler/setup.rb, But when I run $locate bundler/setup.rb, ther开发者_Python百科e is nothing coming out. It is just so weird...

To refresh the index locate uses, you need to run updatedb. On Ubuntu there are cron jobs, that run it from time to time, but to find newly created files, you have to run in manually.

About the real question: You ruby installation was broken, so reinstalling fixed it. Next time you can use gem env to check if the paths match the paths on disk and move the files.