When inheriting of a class with unsafe methods there are some problems
 
[Wrapper("AcGiDrawableOverrule")]
public abstract class DrawableOverrule : Overrule
{

public virtual int SetAttributes(Drawable drawable, DrawableTraits traits);
[return: MarshalAs(UnmanagedType.U1)]
public virtual bool WorldDraw(Drawable drawable, WorldDraw wd);

}
 
When subclassing this class in IronRuby it isn't allowed to call super in this method because that will throw an error
 
class MySubClass < DrawableOverride
def world_draw(drawable, wd)

   super  # yields an exception on RubyOverloadResolver.MapSpecialParamaters()

end
end
 
The expected behaviour is probably that there is no exception and things work