At 2002-09-02 07:47, Dylan Thurston wrote:

GHC (and Hugs) check for potential conflicts like this unless you explicitly allow overlapping instances.

AFAIK, even with overlapping instances allowed, GHC will still complain if there's a fundep. See <http://sourceforge.net/tracker/?func=detail&aid=441389&group_id=8032&atid= 108032>. -- Ashley Yakeley, Seattle WA