From: Jim Freeze <jimfreeze@...>
Date: 2007-03-30T22:52:08+09:00
Subject: Workaround for 1.8.6 with CommandLine

Hello

If you are using ruby-1.8.6, you may have noticed a bug where exit  
always
returns 0 when called from within an at_exit block. You can test this  
on your
machine with the following little snippet:

   ruby -e 'at_exit { exit(1) }' ; echo $?

The result should be '1', but ruby-1.8.6 will return '0'.

To workaround this when using commandline, you can change an application
that reads like:

   require 'rubygems'
   require 'commandline'
   class App < CommandLine::Application
   end

to

   require 'rubygems'
   require 'commandline'
   class App < CommandLine::Application_wo_AutoRun
   end
   App.run

This will not use the at_exit technique of self launching the app and  
give the correct
exit code.

Jim