GHC 6.4 release candidates available

Simon Peyton-Jones simonpj at
Mon Mar 7 03:39:13 EST 2005

| >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

| This worked in all GHCi before 6.4 - so something has broken the (in
| opinion) correct
| behavior. Was this a deliberate decision - or has something just
| 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


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