compile error with current ghc 7.8 snapshot

[peti]

haskell-src-exts 1.14.0 doesn't compile with the current GHC 7.8 snapshot:

[19 of 22] Compiling Language.Haskell.Exts.InternalParser ( dist/build/Language/Haskell/Exts/InternalParser.hs, dist/build/Language/Haskell/Exts/InternalParser.o )

templates/GenericTemplate.hs:104:22:
    Couldn't match expected type ‛Bool’
                with actual type ‛Happy_GHC_Exts.Int#’
    In the expression:
      (n Happy_GHC_Exts.<# (0# :: Happy_GHC_Exts.Int#))
    In a stmt of a pattern guard for
                   a case alternative:
      (n Happy_GHC_Exts.<# (0# :: Happy_GHC_Exts.Int#))
    In a case alternative:
        n | (n Happy_GHC_Exts.<# (0# :: Happy_GHC_Exts.Int#))
          -> (happyReduceArr Happy_Data_Array.! rule) i tk st
          where
              rule
                = (Happy_GHC_Exts.I#
                     ((Happy_GHC_Exts.negateInt#
                         ((n Happy_GHC_Exts.+# (1# :: Happy_GHC_Exts.Int#))))))

templates/GenericTemplate.hs:115:23:
    Couldn't match expected type ‛Bool’
                with actual type ‛Happy_GHC_Exts.Int#’
    In the expression:
      (off_i Happy_GHC_Exts.>=# (0# :: Happy_GHC_Exts.Int#))
    In the expression:
      if (off_i Happy_GHC_Exts.>=# (0# :: Happy_GHC_Exts.Int#)) then
          (indexShortOffAddr happyCheck off_i Happy_GHC_Exts.==# i)
      else
          False
    In an equation for ‛check’:
        check
          = if (off_i Happy_GHC_Exts.>=# (0# :: Happy_GHC_Exts.Int#)) then
                (indexShortOffAddr happyCheck off_i Happy_GHC_Exts.==# i)
            else
                False

templates/GenericTemplate.hs:117:30:
    Couldn't match expected type ‛Happy_GHC_Exts.Int#’
                with actual type ‛Bool’
    In the expression: False
    In the expression:
      if (off_i Happy_GHC_Exts.>=# (0# :: Happy_GHC_Exts.Int#)) then
          (indexShortOffAddr happyCheck off_i Happy_GHC_Exts.==# i)
      else
          False

templates/GenericTemplate.hs:119:13:
    Couldn't match expected type ‛Bool’
                with actual type ‛Happy_GHC_Exts.Int#’
    In the expression: check
    In a stmt of a pattern guard for
                   a pattern binding:
      check

templates/GenericTemplate.hs:212:14:
    Pattern bindings containing unlifted types should use an outermost bang pattern:
      (sts1@((HappyCons (st1@(action)) (_))))
        = happyDrop k (HappyCons (st) (sts))
    In an equation for ‛happyMonadReduce’:
        happyMonadReduce k nt fn j tk st sts stk
          = happyThen1
              (fn stk tk)
              (\ r -> happyGoto nt j tk st1 sts1 (r `HappyStk` drop_stk))
          where
              (sts1@((HappyCons (st1@(action)) (_))))
                = happyDrop k (HappyCons (st) (sts))
              drop_stk = happyDropStk k stk

templates/GenericTemplate.hs:219:14:
    Pattern bindings containing unlifted types should use an outermost bang pattern:
      (sts1@((HappyCons (st1@(action)) (_))))
        = happyDrop k (HappyCons (st) (sts))
    In an equation for ‛happyMonad2Reduce’:
        happyMonad2Reduce k nt fn j tk st sts stk
          = happyThen1
              (fn stk tk)
              (\ r -> happyNewToken new_state sts1 (r `HappyStk` drop_stk))
          where
              (sts1@((HappyCons (st1@(action)) (_))))
                = happyDrop k (HappyCons (st) (sts))
              drop_stk = happyDropStk k stk
              (off) = indexShortOffAddr happyGotoOffsets st1
              (off_i) = (off Happy_GHC_Exts.+# nt)
              ....

[UnkindPartition]

Please see #60. Hopefully the comments there will help you resolve this problem.

[peti]

OK, I managed to fix the issue. The gist of it all is:

1. The build needs Happy 1.19.x.
2. cabal clean must be run to wipe out the obsolete Happy parser that's included in the distribution tarball. Without this step, no new parser will be generated.

[geraldus]

Tried to build ghcjs (manual) with GHC ver 7.8.20140130 on OS X 10.9.1 without success because of haskell-src-exts 1.14.0 installation fail.
To resolve this:

• first I've updated happy from 1.19.2 to 1.19.3

cabal update
cabal install happy

• then cabal clean inside clonned ghcjs repo (mandatory)

Now GHCJS and haskell-src-exts 1.14.0 both have been installed successfully.

Thanks.

[UnkindPartition]

@geraldus this is fixed in haskell-src-exts 1.14.0.1

[mwotton]

@feuerbach I'm still getting this error with 1.14.0.1, and also with the latest github commit. Ah, updating to latest happy fixed it.

[UnkindPartition]

@mwotton check that you have happy-1.19 installed and used by cabal

[mwotton]

yes, sorry - github comment failed :)