#14190: Typeable imposes seemingly redundant constraints on polykinded instances -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: (none) Type: bug | Status: patch Priority: normal | Milestone: 8.4.1 Component: Compiler (Type | Version: 8.2.1 checker) | Resolution: | Keywords: Typeable Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4000 Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): Getting rid of `TrFun` does seem to simplify the story substantially. If we end up keeping it, by the way, I think we should really have a `Note` explaining why the fingerprinting is safe. It's because whenever `p q` is well-kinded, `p -> q` is not. Not a complicated matter, but I think one worth mentioning. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14190#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler