#13742: Code using ConstraintKinds needs explicit kind signature with GHC 8.2.1 -------------------------------------+------------------------------------- Reporter: albertov | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1-rc2 (Type checker) | Keywords: | Operating System: Unknown/Multiple ConstraintKinds, KindSignatures | Architecture: | Type of failure: GHC rejects Unknown/Multiple | valid program Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- The attached module compiles without errors with GHC 8.0.1 but needs an explicit kind signature with GHC 8.2.1-rc2. Mentioned in this [https://mail.haskell.org/pipermail/ghc- devs/2017-May/014222.html ghc-dev thread]. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13742 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler