The 'testfile' module requires the 'tmpdir' module, which in return requires the 'tmpdir' module which is applicable
only to win32 systems.  When running in debug mode this generates an extraneous error:

Exception `LoadError' at /usr/local/lib/ruby/1.8/tmpdir.rb:12 - no such file to load -- Win32API

Suggest modifying the 'testfile' module to require 'tmpdir' only on Windows:

*** tempfile.rb.fixed   Mon Apr  3 09:39:43 2006
--- tempfile.rb Tue May 10 21:46:31 2005
***************
*** 5,11 ****
  #
  
  require 'delegate'
! require 'tmpdir' if RUBY_PLATFORM =~ /mswin/i
  
  # A class for managing temporary files.  This library is written to be
  # thread safe.
--- 5,11 ----
  #
  
  require 'delegate'
! require 'tmpdir'
  
  # A class for managing temporary files.  This library is written to be
  # thread safe.

Date: 2007-05-30 14:44
Sender: Daniel Berger

This ticket can be closed. As of 1.8.6 (and perhaps earlier)
the Windows specific code is wrapped in a begin/rescue clause.

Dan

Date: 2006-04-04 09:41
Sender: Larry Prall

Wrong fix.  Need to modify tmpdir.rb so that it only requires
Win32API on
windows:

*** tmpdir.rb   Tue Apr  4 05:36:21 2006
--- tmpdir.rb.mod       Tue Apr  4 05:32:51 2006
***************
*** 8,14 ****
  
    @@systmpdir = '/tmp'
  
!   if RUBY_PLATFORM =~ /mswin/i
      begin
        require 'Win32API'
        max_pathlen = 260
--- 8,14 ----
  
    @@systmpdir = '/tmp'
  
!  if RUBY_PLATFORM =~ /mswin/i
      begin
        require 'Win32API'
        max_pathlen = 260
***************
*** 24,30 ****
        @@systmpdir = temp if File.directory?(temp) and
File.writable?(temp)
      rescue LoadError
      end
!   end
  
    ##
    # Returns the operating system's temporary file path.
--- 24,31 ----
        @@systmpdir = temp if File.directory?(temp) and
File.writable?(temp)
      rescue LoadError
      end
!  end
! end
  
    ##
    # Returns the operating system's temporary file path.