GHC 6.4 release candidates available

[Simon Peyton-Jones]

| >If you could specify overlapping on a per-instance basis, then that
| >would be a way around the problem.

Yes, that's the solution I prefer.  The only question is when to action
it....

| This worked in all GHCi before 6.4 - so something has broken the (in
mu
| opinion) correct
| behavior. Was this a deliberate decision - or has something just
changed
| without anyone realising?

I explained in an earlier message in this thread why the new behaviour
was an accidental consequence of lazy reporting of overlapping
instances.    

Simon