> The following ``code'' forces ghc-4.04 to crash with an
> internal Happy error message:
>
> > module Rules where
>
> > import GlaExts
> > import PrelGHC
>
> > integerGcd :: Integer -> Integer -> Integer
> > integerGcd a b
> > = case a of
> > (S# a) -> case b of
> > (S# b) -> unsafePerformIO $
> > _ccall_ gcdSSSZh (I# a)
> (1::Int) (I# b) >>= \g ->
> > case g of (I# g) -> return (S# g)
> > (J# sb b) -> unsafePerformIO $
> > _casm_ gcdSBSZh a sb b >>= \g ->
> > case g of (I# g) -> return (S# g)
I get a parse error:
~/scratch > ghc-4.04 test57.lhs -fglasgow-exts
test57.lhs:14: parse error on input `gcdSBSZh'
it maybe that you compiled up your GHC with an old version of Happy - there
have been several bugfixes in this area in the last few months.
Cheers,
Simon
