#13913: Can't apply higher-ranked kind in type family -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.0.1 checker) | Resolution: | Keywords: 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 goldfire): I believe this is a dup of #11719. My recent [https://github.com/ghc- proposals/ghc-proposals/pull/55 proposal] around adding explicit `forall`s to type family equations will introduce a workaround. Perhaps a simple case like this, though, could be made to work. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13913#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler