Interface Covariance Bug?

[Walter Bright]

"John C" <johnch_atms at hotmail.com> wrote in message 
news:e0avij$1bpj$1 at digitaldaemon.com...
> But surely it highlights a separate bug: forward referencing isn't 
> supposed to be an issue in D, is it?

Generally, it isn't. But the internal semantic routines need to be 
reorganized/reimplemented to do this better, and I'm not up for that right 
now.