Reifying a GADT doesn't tell you the correct return type
Running this example:
{-# LANGUAGE GADTs, TemplateHaskell #-}
module Main (main) where
import Language.Haskell.TH
type S = T
data T a where
MkT :: S Int
$(return [])
main :: IO ()
main = putStrLn $(reify ''T >>= stringE . pprint)gives the following result:
data Main.T (a_0 :: *) where Main.MkT :: Main.T GHC.Types.IntShouldn't the return type be Main.S GHC.Types.Int instead?
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Template Haskell |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | jstolarek |
| Operating system | |
| Architecture |