From: David Heinemeier Hansson <david@...>
Date: 2003-08-05T19:51:40+09:00
Subject: Re: Log4r and Ruby 1.8.0 in Singleton problems

> D> irb(main):001:0> require 'Singleton'
>                              ^^^^^^^^^
>
>  What is this module ?

I'm sorry. I recreated the test case too quickly (and wrong). Here's a 
better one:

log4r.rbx:

require 'log4r'

Log = Log4r::Logger.new("AC")
Log.add Log4r::StderrOutputter.new 'console'

....which produce:

/usr/local/lib/ruby/1.8/singleton.rb:161:in `undef_method': undefined 
method `extend_object' for `Singleton' (NameError)
         from /usr/local/lib/ruby/1.8/singleton.rb:161
         from /usr/local/lib/ruby/1.8/auto-reload.rb:77:in `load'
         from /usr/local/lib/ruby/1.8/auto-reload.rb:77:in `require'
         from /usr/local/lib/ruby/site_ruby/1.8/log4r/repository.rb:4
         from /usr/local/lib/ruby/1.8/auto-reload.rb:77:in `load'
         from /usr/local/lib/ruby/1.8/auto-reload.rb:77:in `require'
         from 
/usr/local/lib/ruby/site_ruby/1.8/log4r/outputter/outputterfactory.rb:5
         from /usr/local/lib/ruby/1.8/auto-reload.rb:77:in `load'
          ... 12 levels...
         from /usr/local/lib/ruby/1.8/auto-reload.rb:77:in `require'
         from /Users/david/Sites/extranet/log4r.rbx:1
         from /usr/local/lib/ruby/1.8/apache/ruby-run.rb:53:in `load'
         from /usr/local/lib/ruby/1.8/apache/ruby-run.rb:53:in `handler'

The contents of log4r.rbx works fine if used in IRB, but not under 
mod_ruby.

/ David