From: Patrick Li <patrickli_2001@...>
Date: 2008-08-20T13:17:31+09:00
Subject: Marshaling an object destroys dynamically created methods

I noticed this this afternoon:
Unmarshaling a marshaled object, makes all dynamically created methods
private.

#Here's a class that dynamically creates the method MyPage#print()
class MyPage
  def initialize
    MyPage.class_eval do
      def print
        puts @a
      end
    end
  end
end

#Test the class
page = MyPage.new
page.print #prints nil

#Marshal the object
File.open("object.obj","w") do |f|
  Marshal.dump(page, f)
end

#UnMarshal the object, and try printing again
page = nil
File.open("object.obj","r") do |f|
  page = Marshal.load(f)
end
page.print

#gives me:
#private method `print' called for #<MyPage:0x27af394 @a=3>
(NoMethodError)
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