On Sat, Sep 22, 2007 at 10:45:50AM +0200, Dirk Kleeblatt wrote: > Dear *, > > I just failed to get generic classes working with snapshot > ghc-6.8.0.20070920-i386-unknown-linux.tar.bz2. Are generics broken in > the RC, or am I doing something wrong? > > I tried the following module: ... > Gen.hs:13:0: > Can't find interface-file declaration for variable GHC.Base.$gfromBool > Probable cause: bug in .hi-boot file, or inconsistent .hi file > Use -ddump-if-trace to get an idea of which file caused the error > In the first argument of `a', namely `(GHC.Base.$gfromBool b)' > In the first argument of `(\ a -> a)', namely > `(a (GHC.Base.$gfromBool b))' > In the expression: (\ a -> a) (a (GHC.Base.$gfromBool b)) > Failed, modules loaded: none.
This is definitely a GHC bug: http://hackage.haskell.org/trac/ghc/wiki/ReportABug Stefan
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