Installing Ruby/Rubygems error @ Ubuntu

Question

I'm trying to install Ruby on Rails on Ubuntu following the steps from "How to Install Ruby on Rails on Ubuntu 12.04 LTS (Precise Pangolin) with RVM".

Everything worked well until here:

gabi@ubuntu:~$ rvm rubygems current
Removing old Rubygems files...
Installing rubygems-1.8.25 for ruby-1.9.3-p385 ...
Error running 'env GEM_PATH=/home/gabi/.rvm/gems/ruby-1.9.3-p385:/home/gabi/.rvm/gems/ruby-1.9.3-p385@global:/home/gabi/.rvm/gems/ruby-1.9.3-p385:/home/gabi/.rvm/gems/ruby-1.9.3-p385@global GEM_HOME=/home/gabi/.rvm/gems/ruby-1.9.3-p385 /home/gabi/.rvm/rubies/ruby-1.9.3-p385/bin/ruby /home/gabi/.rvm/src/rubygems-1.8.25/setup.rb', please read /home/gabi/.rvm/log/ruby-1.9.3-p385/rubygems.install.log
Installation of rubygems did not complete successfully.

The log file looks like this:

/home/gabi/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/yaml.rb:36:in `remove_method': method `to_yaml' not defined in Object (Nam
eError)
  from /home/gabi/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/yaml.rb:36:in `yamler='
  from /home/gabi/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/yaml.rb:33:in `class_eval'
  from /home/gabi/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/yaml.rb:33:in `yamler='
  from /home/gabi/.rvm/rubies/ruby-1.9.3-p385/lib/ruby/1.9.1/yaml.rb:76:in `<top (required)>'
  from /home/gabi/.rvm/src/rubygems-1.8.25/lib/rubygems/custom_require.rb:36:in `require'
  from /home/gabi/.rvm/src/rubygems-1.8.25/lib/rubygems/custom_require.rb:36:in `require'
  from /home/gabi/.rvm/src/rubygems-1.8.25/lib/rubygems.rb:680:in `load_yaml'
  from /home/gabi/.rvm/src/rubygems-1.8.25/lib/rubygems/config_file.rb:249:in `load_file'
  from /home/gabi/.rvm/src/rubygems-1.8.25/lib/rubygems/config_file.rb:190:in `initialize'
  from /home/gabi/.rvm/src/rubygems-1.8.25/lib/rubygems/gem_runner.rb:78:in `new'
  from /home/gabi/.rvm/src/rubygems-1.8.25/lib/rubygems/gem_runner.rb:78:in `do_configuration'
  from /home/gabi/.rvm/src/rubygems-1.8.25/lib/rubygems/gem_runner.rb:51:in `run'
  from setup.rb:38:in `<main>'

What's exactly the issue and how can I solve it?

I think it's safe to skip the step. I don't recall ever doing that. Check on the official rvm site. — mathieugagne
i tried to skip it but when i'm trying to install rails i get the same output like the one in the log file... — GabrielCol

GabrielCol GabrielCol · Accepted Answer · 2013-02-19T23:14:58

Not sure what was the problem, I think something went wrong on installing, however I managed to make it work by using the quick fix from here:

Update RVM using: rvm get head
Remove all the manually installed packages using: rvm pkg remove
Install the required libraries using: rvm requirements run
Reinstall Ruby using: rvm reinstall 1.9.3

Installing Ruby/Rubygems error @ Ubuntu

2 Answers