ApiAnnotations : mkGadtDecl discards annotations for HsFunTy

When mkGadtDecl is presented wih a HsFunTy it discards the SrcSpan, thus disconnecting any annotations on the HsFunTy.

mkGadtDecl names (L ls (HsForAllTy imp Nothing qvars cxt tau))
  = return $ mk_gadt_con names
  where
    (details, res_ty)           -- See Note [Sorting out the result type]
      = case tau of
          L _ (HsFunTy (L l (HsRecTy flds)) res_ty)
                                            -> (RecCon (L l flds), res_ty)
          _other                                    -> (PrefixCon [], tau)
...

This can be triggered by the following

{-# LANGUAGE GADTs #-}
module GADTRecords2 (H1(..)) where

-- | h1
data H1 a b where
  C3 :: (Num a) => { field :: a -- ^ hello docs
                   } -> H1 Int Int

Trac metadata

Trac field	Value
Version	7.10.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler (Parser)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC	mpickering
Operating system
Architecture