On 11.06.2007 16:21, Alex Young wrote:
> At the risk of asking an FAQ, I've run into the following problem:
> 
> irb(main):001:0> require 'thread'
> => true
> irb(main):002:0> class Mutex; attr_accessor :owner; end
> => nil
> irb(main):003:0> require 'rubygems'
> => true
> irb(main):004:0> require 'fastthread'
> => true
> irb(main):005:0> a = Mutex.new
> => #<Mutex:0xb788184c>
> irb(main):006:0> a.owner = :foo
> NoMethodError: undefined method `owner=' for #<Mutex:0xb788184c>
>         from (irb):6
> 
> 
> As you can see, the method definition prior to the fastthread require is 
> lost.  This wasn't a problem with 0.6.4, but is a problem with 1.0.  Is 
> this a genuine bug, or is there a good reason for this?

I don't know.  But IMHO it's a bad idea to change class Mutex.  Why do 
you think you need that?

Kind regards

	robert