laptop:~ $ gem install futuroscope
Fetching: futuroscope-0.1.3.gem (100%)
Successfully installed futuroscope-0.1.3
1 gem installed
Installing ri documentation for futuroscope-0.1.3...
Installing RDoc documentation for futuroscope-0.1.3...
laptop:~ $ irb
1.9.3-p392 :001 > require 'futuroscope'
NameError: uninitialized constant Forwardable
from /Users/alxgsv/.rvm/gems/ruby-1.9.3-p392/gems/futuroscope-0.1.3/lib/futuroscope/future.rb:11:in `<class:Future>'
from /Users/alxgsv/.rvm/gems/ruby-1.9.3-p392/gems/futuroscope-0.1.3/lib/futuroscope/future.rb:10:in `<module:Futuroscope>'
from /Users/alxgsv/.rvm/gems/ruby-1.9.3-p392/gems/futuroscope-0.1.3/lib/futuroscope/future.rb:4:in `<top (required)>'
from /Users/alxgsv/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /Users/alxgsv/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /Users/alxgsv/.rvm/gems/ruby-1.9.3-p392/gems/futuroscope-0.1.3/lib/futuroscope.rb:3:in `<top (required)>'
from /Users/alxgsv/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `require'
from /Users/alxgsv/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `rescue in require'
from /Users/alxgsv/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
from (irb):1
from /Users/alxgsv/.rvm/rubies/ruby-1.9.3-p392/bin/irb:16:in `<main>'