Panic because of "updateRole"

Not the most recent GHC

{-# LANGUAGE RankNTypes, TypeInType #-}

import Data.Kind

data HEq :: forall k1. k1 -> forall k2. k2 -> Type where

gives

% ghci -ignore-dot-ghci tx9F.hs 
GHCi, version 8.1.20160117: http://www.haskell.org/ghc/  :? for help
[1 of 1] Compiling Main             ( tx9F.hs, interpreted )
ghc: panic! (the 'impossible' happened)
  (GHC version 8.1.20160117 for x86_64-unknown-linux):
        updateRole
  HEq
  k2_a115
  [a114 :-> 0, a11e :-> 1, a11f :-> 2]

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

> 

Trac metadata

Trac field	Value
Version	8.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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