Thu Feb 17 06:10:00 PST 2011 [email protected]
* Fix Trac #4966
This is just a program that exploits overlapping
instances in a delicate way. The fix makes GHC
a bit more friendly towards such programs.
See Note [Overlap and deriving] in TcSimplify
M ./compiler/typecheck/TcSimplify.lhs -5 +30
View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc-7.0/ghc;a=darcs_commitdiff;h=20110217141000-1287e-fc0ddc3002c298da5bacefd9f6f64b584d755437.gz
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