zak@lian:~/code/hoe$ irb -d
rbx-head :001 > require 'rubygems'
Exception: `LoadError' kernel/common/codeloader.rb:330 - no such file to load -- rubygems/defaults/operating_system
Exception: `LoadError' kernel/common/codeloader.rb:330 - no such file to load -- Win32API
Exception: `Errno::EEXIST' kernel/common/dir.rb:87 - File exists - /home/zak/.gem/rbx/1.8/cache
 => true
rbx-head :002 > require 'hoe'
Exception: `LoadError' kernel/common/codeloader.rb:330 - no such file to load -- hoe
Exception: `NoMethodError' /home/zak/.rvm/rubies/rbx-head/lib/rational.rb:78 - undefined method `gcd' on an instance of Rational.
 => true
rbx-head :003 > Hoe.load_plugins
loading /home/zak/.rvm/gems/rbx-head@hoe/gems/hoe-2.8.0/lib/hoe/deps.rb
loading /home/zak/.rvm/gems/rbx-head@hoe/gems/hoe-2.8.0/lib/hoe/publish.rb
loading /home/zak/.rvm/gems/rbx-head@hoe/gems/hoe-2.8.0/lib/hoe/flay.rb
loading /home/zak/.rvm/gems/rbx-head@hoe/gems/hoe-2.8.0/lib/hoe/rcov.rb
loading /home/zak/.rvm/gems/rbx-head@hoe/gems/hoe-2.8.0/lib/hoe/flog.rb
loading /home/zak/.rvm/gems/rbx-head@hoe/gems/hoe-2.8.0/lib/hoe/test.rb
loading /home/zak/.rvm/gems/rbx-head@hoe/gems/hoe-2.8.0/lib/hoe/gemcutter.rb
loading /home/zak/.rvm/gems/rbx-head@hoe/gems/hoe-2.8.0/lib/hoe/clean.rb
loading /home/zak/.rvm/gems/rbx-head@hoe/gems/hoe-2.8.0/lib/hoe/newb.rb
loading /home/zak/.rvm/gems/rbx-head@hoe/gems/hoe-2.8.0/lib/hoe/debug.rb
Unable to execute subprogram
    Invalid argument - execvp(2) failed (Errno::EINVAL)

Backtrace:
                           Kernel.exec at kernel/common/process.rb:672
                 Kernel(Module)#system at kernel/common/process.rb:635
   Hoe::Debug.__module_init__ (Debug) at /home/zak/.rvm/gems/rbx-head@hoe/gems
                                         /hoe-2.8.0/lib/hoe/debug.rb:18
                      main.__script__ at /home/zak/.rvm/gems/rbx-head@hoe/gems
                                         /hoe-2.8.0/lib/hoe/debug.rb:10
                    Kernel(Class)#load at kernel/common/kernel.rb:684
              { } in Hoe.load_plugins at /home/zak/.rvm/gems/rbx-head@hoe/gems
                                         /hoe-2.8.0/lib/hoe.rb:243
       { } in Enumerable(Hash)#collect at kernel/common/enumerable.rb:273
                             Hash#each at kernel/common/hash.rb:317 (jit)
        Enumerable(Hash)#map (collect) at kernel/common/enumerable.rb:273
                     Hoe.load_plugins at /home/zak/.rvm/gems/rbx-head@hoe/gems
                                         /hoe-2.8.0/lib/hoe.rb:238
             { } in Object#irb_binding at (irb):3
           Kernel(IRB::WorkSpace)#eval at kernel/common/eval.rb:115
              IRB::WorkSpace#evaluate at /home/zak/.rvm/rubies/rbx-head/lib/irb
                                         /workspace.rb:81
                IRB::Context#evaluate at /home/zak/.rvm/rubies/rbx-head/lib/irb
                                         /context.rb:219
 { } in IRB::IrbRubinius#process_statements at /home/zak/.rvm/rubies/rbx-head
                                               /lib/irb/rubinius.rb:42
 IRB::Irb(IRB::IrbRubinius)#signal_status at /home/zak/.rvm/rubies/rbx-head/lib
                                             /irb.rb:273
 { } in IRB::IrbRubinius#process_statements at /home/zak/.rvm/rubies/rbx-head
                                               /lib/irb/rubinius.rb:39
 { } in RubyLex#each_top_level_statement at /home/zak/.rvm/rubies/rbx-head/lib
                                            /irb/ruby-lex.rb:244
                  Kernel(RubyLex)#loop at kernel/common/kernel.rb:292
 { } in RubyLex#each_top_level_statement at /home/zak/.rvm/rubies/rbx-head/lib
                                            /irb/ruby-lex.rb:230
          { } in Kernel(RubyLex)#catch at kernel/common/throw_catch.rb:34
        Rubinius::ThrownValue.register at kernel/common/throw_catch.rb:13
                 Kernel(RubyLex)#catch at kernel/common/throw_catch.rb:33
     RubyLex#each_top_level_statement at /home/zak/.rvm/rubies/rbx-head/lib/irb
                                         /ruby-lex.rb:229
  IRB::IrbRubinius#process_statements at /home/zak/.rvm/rubies/rbx-head/lib/irb
                                         /rubinius.rb:38
 IRB::Irb(IRB::IrbRubinius)#eval_input at /home/zak/.rvm/rubies/rbx-head/lib
                                          /irb.rb:152
                     { } in IRB.start at /home/zak/.rvm/rubies/rbx-head/lib
                                         /irb.rb:76
           { } in Kernel(Module)#catch at kernel/common/throw_catch.rb:34
        Rubinius::ThrownValue.register at kernel/common/throw_catch.rb:13
                  Kernel(Module)#catch at kernel/common/throw_catch.rb:33
                            IRB.start at /home/zak/.rvm/rubies/rbx-head/lib
                                         /irb.rb:75
                      main.__script__ at /home/zak/.rvm/rubies/rbx-head/lib/bin
                                         /irb.rb:13
      Rubinius::CodeLoader#load_script at kernel/delta/codeloader.rb:67
      Rubinius::CodeLoader.load_script at kernel/delta/codeloader.rb:91
               Rubinius::Loader#script at kernel/loader.rb:521
                 Rubinius::Loader#main at kernel/loader.rb:619
                 Rubinius::Loader.main at kernel/loader.rb:658
                     Object#__script__ at kernel/loader.rb:669
loading /home/zak/.rvm/gems/rbx-head@hoe/gems/hoe-2.8.0/lib/hoe/package.rb
loading /home/zak/.rvm/gems/rbx-head@hoe/gems/hoe-2.8.0/lib/hoe/signing.rb
 => nil