rubysl-resolv : NoMethodError in Resolv#use_ipv6?

output.log

[rbitter] Try to reconnect...
An exception occurred running /home/nidev/.rbenv/versions/rbx-2.5.5/bin/rbitter:

undefined method `ip_address_list' on Socket (Class) (NoMethodError)

Backtrace:

  Kernel(Class)#ip_address_list (method_missing) at kernel/delta/kernel.rb:78
                Resolv::DNS#use_ipv6? at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /rubysl-resolv-2.1.2/lib/rubysl/resolv
                                         /resolv.rb:414
             Resolv::DNS#each_address at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /rubysl-resolv-2.1.2/lib/rubysl/resolv
                                         /resolv.rb:407
           { } in Resolv#each_address at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /rubysl-resolv-2.1.2/lib/rubysl/resolv
                                         /resolv.rb:114
                            Array#each at kernel/bootstrap/array.rb:76
                  Resolv#each_address at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /rubysl-resolv-2.1.2/lib/rubysl/resolv
                                         /resolv.rb:113
                    Resolv#getaddress at .rbenv/versions/rbx-2.5.5/gems/gems
                    Resolv#getaddress at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /rubysl-resolv-2.1.2/lib/rubysl/resolv
                                         /resolv.rb:91
                    Resolv.getaddress at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /rubysl-resolv-2.1.2/lib/rubysl/resolv
                                         /resolv.rb:42
 Twitter::Streaming::Connection#stream at .rbenv/versions/rbx-2.5.5/gems/gems
                                          /rbitter-0.1.2/lib/rbitter
                                          /libtwitter_connection_override.rb:20
   Twitter::Streaming::Client#request at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /twitter-5.14.0/lib/twitter/streaming
                                         /client.rb:118
      Twitter::Streaming::Client#user at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /twitter-5.14.0/lib/twitter/streaming
                                         /client.rb:91
       Rbitter::StreamClient#internal at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /rbitter-0.1.2/lib/rbitter
                                         /streaming.rb:56
            Rbitter::StreamClient#run at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /rbitter-0.1.2/lib/rbitter
                                         /streaming.rb:46
         Rbitter::ArcServer#main_loop at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /rbitter-0.1.2/lib/rbitter
                    Rbitter.bootstrap at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /rbitter-0.1.2/lib/rbitter.rb:69
                    Object#__script__ at .rbenv/versions/rbx-2.5.5/gems/gems
                                         /rbitter-0.1.2/bin/rbitter:11
                   Kernel(Object)#load at kernel/common/kernel.rb:498
                    Object#__script__ at .rbenv/versions/rbx-2.5.5/bin
                                         /rbitter:23
      Rubinius::CodeLoader#load_script at kernel/delta/code_loader.rb:66
      Rubinius::CodeLoader.load_script at kernel/delta/code_loader.rb:152
               Rubinius::Loader#script at kernel/loader.rb:656
                 Rubinius::Loader#main at kernel/loader.rb:810