What causes this dependency error in Rails 3?

Question

I now get the following:

`dependencies.rb:239:in `require': no such file to load -- require_relative (LoadError`)

But I don't have enough information to figure out what is causing it or how to debug it.

What can I do?

Answer 1

It probably comes from linecache gem version 0.45 which was released yesterday. Rolling back to 0.43 will get you around this for now. I'm not sure if they intentionally broke support with Ruby 1.8.7 or not.

This is a dependency of ruby-debug-base.

Add something similar to the following in your Gemfile.

group :development, :test, :cucumber do 
  gem "linecache", "0.43"
  gem "ruby-debug-base", "0.10.4.0"
  gem "ruby-debug", "0.10.4"
end

Answer 2

Alternatively, add

gem 'require_relative'

to your Gemfile. It looks like linecache 0.45 needs it, but 0.43 doesn't, which is why downgrading linecache works.