#9200: Milner-Mycroft failure at the kind level -------------------------------------+------------------------------------- Reporter: ekmett | Owner: goldfire Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 (Type checker) | Keywords: Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: GHC | Related Tickets: rejects valid program | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by goldfire): What about {{{ type S (a :: k) = Proxy (T (Just a)) data T a = MkT (S a) }}} Does that `S` have a CUSK? If it does, the code should be accepted, I think. Or, would a user have to put in a totally-superfluous ` :: *` at the end of `S`'s RHS? Regardless of the kind of `T`, a proxy is always in kind `*`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9200#comment:34 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler