#15704: Different saturations of the same polymorphic-kinded type constructor aren't seen as apart types -------------------------------------+------------------------------------- Reporter: mniip | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler (Type | Version: 8.6.1 checker) | Resolution: | Keywords: TypeFamilies Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: #9371 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by mniip): Considering `unify_tys` is called recursively from when `unify_ty` needs to match a constructor application, I think this functionality of "Maybe"ing out on lists of different lengths needs to be moved somewhere closer to coaxiom compatibility checking and further away from `unify_tys`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15704#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler