We agree. In fact the problem is that trait and classes are not polymorphic and this is what the implementation of andreas ws resolving. We will have to propose a solution to this problem one of these days. Stef
btw2... On my experience working with pharo and traits, i had many problems because it was usual to get errors on browsers, environments and others because they didn't handled traits properly. I think it would be nice if the environment tools didn't differenciate (whenever it makes sense) between classes and traits. In my thesis I propose the idea of behavior (since both define behavior) as a unifying entity for traits and classes. In this way, the environment tools would handle behaviors instead of just classes.
cheers
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