From: dblack@...
Date: 2006-07-21T06:30:52+09:00
Subject: Re: Problem when 'loading' a file containing a class derived from a struct

Hi --

On Fri, 21 Jul 2006, Chris Roos wrote:

> I actually spotted this in a rails app but traced it back to ruby.  Is
> this a real problem/bug or am I missing something obvious?
>
> $ cat > person.rb
> class Person < Struct.new(:forename, :surname)
> end
> $ irb
> irb> load 'person.rb'
> => true
> irb> load 'person.rb'
> TypeError: superclass mismatch for class Person
>       from ./person.rb:1
>       from (irb):2
>
> This behaviour has been experienced with both ruby 1.8.2 and 1.8.4.

It's because you're trying to give Person a new superclass: Struct.new
gets called again when you reload the file.


David

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