#12102: “Constraints in kinds” illegal family application in instance (+ documentation issues?) -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | typecheck/should_fail/T12102 Blocked By: | Blocking: Related Tickets: #13780, #15872, | Differential Rev(s): Phab:D5397 #16263 | Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): Ryan, there's now an extensive comment in `Note [Constraints in kinds]` in TyCoRep that describes what is supposed to happen for equality constraints in kinds. In the light of that description, could you spare the time to look into this ticket and #15872 to see what needs doing? I think we may need to look at the user manual too. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12102#comment:19 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler