Tue Mar 9 09:35:55 PST 2010 [email protected]
* Fix Trac #1954: newtype deriving caused 'defined but not used' error
We were getting a bogus claim that a newtype "data constructor" was
unused. The fix is easy, although I had to add a field to the constructor
TcEnv.NewTypeDerived
See Note [Newtype deriving and unused constructors] in TcDeriv
M ./compiler/typecheck/TcDeriv.lhs -3 +25
M ./compiler/typecheck/TcEnv.lhs -8 +15
M ./compiler/typecheck/TcInstDcls.lhs -1 +1
View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20100309173555-1287e-30bea4c383b71f1670e113ba04bdf01d87059216.gz
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