#12432: Use kind equality in instance context in type family instance -------------------------------------+------------------------------------- Reporter: j6carey | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.0.1 checker) | Resolution: | Keywords: Operating System: Linux | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by kosmikus): Haven't checked the attached test cases in detail, but from the description and discussion it sounds as if the original issue is #12381, which is fixed in HEAD. And the subsequent issue seems to be #12384, which is not fixed and seems to be difficult to fix. I ran into both of those issues when I tried to write a type-level translation of the new type-level generic metadata that GHC 8 provides into a different representation of type-level metadata that would be useful for generics-sop (and makes use of a type-level GADT and therefore TypeInType). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12432#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler