DEPRECATION WARNING: ActiveSupport::Memoizable is deprecated

[kalys]

I'm getting this message.

DEPRECATION WARNING: ActiveSupport::Memoizable is deprecated and will be removed in future releases,simply use Ruby memoization pattern instead. (called from require at /Users/kalysosmonov/.rvm/rubies/ruby-1.9.3-p327/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36)

[melcher]

On activesupport (4.0.0) and I'm getting

/Users/graham/.rvm/gems/ruby-1.9.3-p448@mothership/gems/serve-0.11.7/lib/serve/rack.rb:32:in `<class:Headers>': uninitialized constant ActiveSupport::Memoizable (NameError)
    from /Users/graham/.rvm/gems/ruby-1.9.3-p448@mothership/gems/serve-0.11.7/lib/serve/rack.rb:31:in `<module:Serve>'
    from /Users/graham/.rvm/gems/ruby-1.9.3-p448@mothership/gems/serve-0.11.7/lib/serve/rack.rb:4:in `<top (required)>'
    from /Users/graham/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/graham/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/graham/.rvm/gems/ruby-1.9.3-p448@mothership/gems/serve-0.11.7/lib/serve.rb:21:in `<top (required)>'
    from /Users/graham/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/graham/.rvm/rubies/ruby-1.9.3-p448/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/graham/.rvm/gems/ruby-1.9.3-p448@mothership/gems/serve-0.11.7/bin/serve:13:in `<top (required)>'
    from /Users/graham/.rvm/gems/ruby-1.9.3-p448@mothership/bin/serve:23:in `load'
    from /Users/graham/.rvm/gems/ruby-1.9.3-p448@mothership/bin/serve:23:in `<main>'

[khoan]

+1