Rails RVM readline

[first_app (master)]$ heroku keys:add
/home/marius/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- readline (LoadError)
	from /home/marius/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
	from /home/marius/.rvm/gems/ruby-1.8.7-p302@rails3gemset/gems/heroku-1.14.10/lib/heroku/commands/app.rb:1
	from /home/marius/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /home/marius/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
	from /home/marius/.rvm/gems/ruby-1.8.7-p302@rails3gemset/gems/heroku-1.14.10/lib/heroku/command.rb:5
	from /home/marius/.rvm/gems/ruby-1.8.7-p302@rails3gemset/gems/heroku-1.14.10/lib/heroku/command.rb:5:in `each'
	from /home/marius/.rvm/gems/ruby-1.8.7-p302@rails3gemset/gems/heroku-1.14.10/lib/heroku/command.rb:5
	from /home/marius/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
	from /home/marius/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
	from /home/marius/.rvm/gems/ruby-1.8.7-p302@rails3gemset/gems/heroku-1.14.10/bin/heroku:7
	from /home/marius/.rvm/gems/ruby-1.8.7-p302@rails3gemset/bin/heroku:19:in `load'
	from /home/marius/.rvm/gems/ruby-1.8.7-p302@rails3gemset/bin/heroku:19
[first_app (master)]$ rails console
/home/marius/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/1.8/irb/completion.rb:10:in `require': no such file to load -- readline (LoadError)
	from /home/marius/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/1.8/irb/completion.rb:10
	from /home/marius/.rvm/gems/ruby-1.8.7-p302@rails3gemset/gems/railties-3.0.3/lib/rails/commands/console.rb:3:in `require'
	from /home/marius/.rvm/gems/ruby-1.8.7-p302@rails3gemset/gems/railties-3.0.3/lib/rails/commands/console.rb:3
	from /home/marius/.rvm/gems/ruby-1.8.7-p302@rails3gemset/gems/railties-3.0.3/lib/rails/commands.rb:20:in `require'
	from /home/marius/.rvm/gems/ruby-1.8.7-p302@rails3gemset/gems/railties-3.0.3/lib/rails/commands.rb:20
	from script/rails:6:in `require'
	from script/rails:6