From: Florian Frank <flori@...>
Date: 2006-07-31T00:05:09+09:00
Subject: Re: what is the scope of this object

Robert Klemme wrote:
> It's a local variable that goes out of scope when the class body is 
> closed.  The fact that you can access it via ObjectSpace does not 
> proove much.  The instance is likely not yet garbage collected when 
> you start ObjectSpace.each_object.  Also note, that it's dangerous to 
> rely on IRB when it comes to local variables and such as IRB behaves 
> slightly different than the Ruby interpreter due to the line by line 
> mode.
First I thought the same. But running the following (even without IRB) 
still finds the object:

class A
  def secret;"you found me";end
end

class BlackHole
  A.new
  nil
end

GC.start
ObjectSpace.each_object(){|obj| $found=obj if obj.respond_to? :secret }
p $found # => #<A:0xb7b1af74>
p $found.secret # => "you found me"

v = [ RUBY_PLATFORM, RUBY_VERSION, RUBY_RELEASE_DATE ] * ' '
p v # => "i686-linux 1.8.4 2005-12-24"

Is this a bug?

-- 
Florian Frank