From: Trans <transfire@...>
Date: 2005-01-27T22:40:58+09:00
Subject: Duping a class causes error

Maybe someone can offer me a possible reason for this. I have a set of
classes in a module called Markers. I have a module method,
Markers#list, that does nothing more than collects them into an array.
Then in my program when I do:

| markers = Markers.list

It works. But when I do:

|  markers = Markers.list.collect { |m| nm = m.dup ; nm }

It does not work.

I don't understand why. Obviously my initial thought is that something
about my Marker classes must not be shallow, but they're just classes,
made of methods and have no state, so I don't see how that can be.
(Actually they do have a small bit of boolean state in a class instance
var, but I check and it is being duplicated.)
I just don't get it. Any ideas?

Thanks,
T.