Re: overlapping attributes not detected

On Fri, Oct 03, 2014 at 09:28:22PM +0000, John Macdonald wrote:
> If you have a role and its consumer both specify the same attribute name (neither one using +name) there is no complaint from Moose and the second one encountered is used and the first is ignored.
> I tracked this down after getting an error that the predicate method was not found - that was defined in the version of the attribute that was discarded without notice.
> Could there be something done in the 'has' handler to detect such duplicates and give an error rather than this sort of quiet misaction?

This is actually a feature. Roles and subclasses should be able to
completely override an earlier attribute declaration.  There are, of
course, opportunities to make this more clear in documentation...