#15664: Core Lint error -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.6.1-beta1 Resolution: | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by monoidal): A bit shorter version: {{{ {-# Language RankNTypes, TypeOperators, DataKinds, PolyKinds, GADTs, TypeInType, TypeFamilies #-} {-# Options_GHC -dcore-lint #-} import Data.Kind type family Apply (f :: Type) :: Type type F f = forall x. x unravel :: F Apply unravel = unravel }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15664#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler