Error installing rails-4.0.0

Question

Using OS X 10.8.4 and ruby 1.9.3p194

$ gem install rails
Successfully installed rails-4.0.0
1 gem installed
Installing ri documentation for rails-4.0.0...
Installing RDoc documentation for rails-4.0.0...
ERROR:  While generating documentation for rails-4.0.0
... MESSAGE:   error generating /Users/michaelirey/.rvm/gems/ruby-1.9.3-p194/doc/rails-4.0.0/rdoc/guides/Rakefile.html: Error while evaluating /Users/michaelirey/.rvm/gems/ruby-1.9.3-p194/gems/rdoc-3.12.2/lib/rdoc/generator/template/darkfish/page.rhtml: undefined method `chomp' for nil:NilClass (RDoc::Error)
... RDOC args: --op /Users/michaelirey/.rvm/gems/ruby-1.9.3-p194/doc/rails-4.0.0/rdoc lib --title rails-4.0.0 Documentation --quiet

Looks like this is just for the documentation, but it would still be nice to get things installed without error.

Answer 1

Try updating rdoc, it may just be old.

gem update rdoc

Answer 2

Can't tell you where that error comes from, but considering how useless installing ri and rdoc actually is, I would just do:

gem install rails --no-ri --no-rdoc

You'll also get a much faster install by skipping the docs. In fact, this is what the official release page recommends: http://weblog.rubyonrails.org/2013/6/25/Rails-4-0-final/