#16008: GHC HEAD type family regression involving invisible arguments -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: highest | Milestone: 8.8.1 Component: Compiler (Type | Version: 8.7 checker) | Keywords: TypeFamilies, Resolution: | TypeInType Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): A workaround is to manually give `SD` a kind ascription: {{{#!hs instance C (D a) where type S = (SD :: D a -> Type) }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16008#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler