$ irb
An exception occurred running IRB
    Error trying to compile /Users/nate/.rvm/rubies/rbx-1.0.1-20100603/lib/bin/irb.rb (Rubinius::CompileError)

Backtrace:
 Rubinius::Compiler.compiler_error at /Users/nate/.rvm/rubies/rbx-1.0.1-20100603
                                      /lib/compiler/compiler.rbc:11
        Rubinius::Compiler.compile at /Users/nate/.rvm/rubies/rbx-1.0.1-20100603
                                      /lib/compiler/compiler.rbc:48
  Rubinius::CodeLoader#compile_file at kernel/delta/codeloader.rb:141
     Rubinius::CodeLoader#load_file at kernel/delta/codeloader.rb:128
       Rubinius::CodeLoader#require at kernel/common/codeloader.rb:39
       Rubinius::CodeLoader.require at kernel/common/codeloader.rb:140
   Kernel(Rubinius::Loader)#require at kernel/common/kernel.rb:693
               Rubinius::Loader#irb at kernel/loader.rb:468
              Rubinius::Loader#main at kernel/loader.rb:528
              Rubinius::Loader.main at kernel/loader.rb:553
                  Object#__script__ at kernel/loader.rb:565

Caused by: No such file or directory - ./Users/nate/.rvm/rubies/rbx-1.0.1-20100603/lib/bin/irb.rbc (Errno::ENOENT)

Backtrace:
                          Errno.handle at kernel/common/errno.rb:16
                       File#initialize at kernel/common/file.rb:74
                             Class#new at kernel/alpha.rb:94
                               IO.open at kernel/common/io.rb:255
          Rubinius::CompiledFile.dump at /Users/nate/.rvm/rubies
                                         /rbx-1.0.1-20100603/lib/compiler
                                         /compiled_file.rbc:39
       Rubinius::Compiler::Writer#run at /Users/nate/.rvm/rubies
                                         /rbx-1.0.1-20100603/lib/compiler
                                         /stages.rbc:72
  Rubinius::Compiler::Stage(Rubinius::Compiler::Packager)#run_next at \
          /Users/nate/.rvm/rubies/rbx-1.0.1-20100603/lib/compiler/stages.rbc:51
     Rubinius::Compiler::Packager#run at /Users/nate/.rvm/rubies
                                         /rbx-1.0.1-20100603/lib/compiler
                                         /stages.rbc:95
  Rubinius::Compiler::Stage(Rubinius::Compiler::Encoder)#run_next at \
          /Users/nate/.rvm/rubies/rbx-1.0.1-20100603/lib/compiler/stages.rbc:51
      Rubinius::Compiler::Encoder#run at /Users/nate/.rvm/rubies
                                         /rbx-1.0.1-20100603/lib/compiler
                                         /stages.rbc:117
  Rubinius::Compiler::Stage(Rubinius::Compiler::Generator)#run_next at \
          /Users/nate/.rvm/rubies/rbx-1.0.1-20100603/lib/compiler/stages.rbc:51
    Rubinius::Compiler::Generator#run at /Users/nate/.rvm/rubies
                                         /rbx-1.0.1-20100603/lib/compiler
                                         /stages.rbc:140
  Rubinius::Compiler::Stage(Rubinius::Compiler::FileParser)#run_next at \
          /Users/nate/.rvm/rubies/rbx-1.0.1-20100603/lib/compiler/stages.rbc:51
  Rubinius::Compiler::Parser(Rubinius::Compiler::FileParser)#run at \
          /Users/nate/.rvm/rubies/rbx-1.0.1-20100603/lib/compiler/stages.rbc:194
               Rubinius::Compiler#run at /Users/nate/.rvm/rubies
                                         /rbx-1.0.1-20100603/lib/compiler
                                         /compiler.rbc:115
           Rubinius::Compiler.compile at /Users/nate/.rvm/rubies
                                         /rbx-1.0.1-20100603/lib/compiler
                                         /compiler.rbc:44
     Rubinius::CodeLoader#compile_file at kernel/delta/codeloader.rb:141
        Rubinius::CodeLoader#load_file at kernel/delta/codeloader.rb:128
          Rubinius::CodeLoader#require at kernel/common/codeloader.rb:39
          Rubinius::CodeLoader.require at kernel/common/codeloader.rb:140
      Kernel(Rubinius::Loader)#require at kernel/common/kernel.rb:693
                  Rubinius::Loader#irb at kernel/loader.rb:468
                 Rubinius::Loader#main at kernel/loader.rb:528
                 Rubinius::Loader.main at kernel/loader.rb:553
                     Object#__script__ at kernel/loader.rb:565