#14331: Overzealous free-floating kind check causes deriving clause to be rejected -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.2.1 checker) | Resolution: | Keywords: deriving 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): I meant exactly what I wrote in the original description: it should emit: {{{#!hs instance C (a :: k) D }}} After all, the user wrote `deriving (C (a :: k))`, and the data type is `D`. What you get after doing the whole `deriving` macro-application-eta- reduction-kind-unification shebang is `C (a :: k) D`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14331#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler