#9858: Typeable instances should be kind-aware -------------------------------------+------------------------------------- Reporter: dreixel | Owner: Type: bug | Status: merge Priority: highest | Milestone: 7.10.2 Component: Compiler | Version: 7.9 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | typecheck/should_fail/T9858a, | should_run/T9858b | Blocking: | Differential Revisions: Phab:D652 -------------------------------------+------------------------------------- Comment (by oerjan): Looking at that fix, I'm not sure exactly what types trigger `isConstraintKind k` (does it include unapplied `Show`, say?), but wouldn't baking that single `Bool` test result into the `TypeRep` also fix things without making `Constraint`s un`Typeable`? Also, I am guessing you still technically have "`Typeable (=>)`" with identical `TypeRep` as `->`, although since they're different kinds I don't see how to exploit that - but that's what we thought of the `()` thing first. :P -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9858#comment:88 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler