#11511: Type family producing infinite type accepted as injective -------------------------------------+------------------------------------- Reporter: jstolarek | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler (Type | Version: 8.1 checker) | Keywords: TypeFamilies, Resolution: | Injective Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by jstolarek): Yes, certainly what I said is conservative - some injective functions would be rejected. What I'm wondering is whether our current approach is sound from a logical point of view. Perhaps assuming `F` injective when checking injectivity of `F` is the reason why Richard couldn't complete the proof we presented in the paper? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11511#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler