libyaml warning doesn\'t go away, even if you install libyaml
gem install bundler /home/ec2-user/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/yaml.rb:56:in `&l
A friend of mine had a similar problem on his mac.
brew install libyaml
ended up working for us and we were able to avoid a reinstall of ruby.