file 'lib' not found when installing rails (ruby) - thanks to Stack Overflow

Helpful insight into a (ruby on) rails install problem I ran into:

I got similar with gem install rails (Ubuntu 12.04, with RVM)

Installing ri documentation for rails-3.2.13...
file 'lib' not found
Installing RDoc documentation for rails-3.2.13...
file 'lib' not found

installing RDoc and then reinstalling rails solved the problem for me. So:

gem install rdoc
gem install rails

file 'lib' not found when installing rails - Stack Overflow

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