Template Haskell boxes unboxed tuple types when reifying them

Example:

{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE UnboxedTuples #-}
module Main where

import Language.Haskell.TH

data T = T (# Int, Int #)

$(return [])

main :: IO ()
main = putStrLn $(reify ''T >>= stringE . pprint)

$ /opt/ghc/8.0.1/bin/ghc -fforce-recomp Constraints.hs
[1 of 1] Compiling Main             ( Constraints.hs, Constraints.o )
Linking Constraints ...
$ ./Constraints 
data Main.T = Main.T ((,,,) GHC.Types.Int GHC.Types.Int)

Patch coming soon.

Trac metadata

Trac field	Value
Version	8.0.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Template Haskell
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