#11405: Incorrect failure of type-level skolem escape check -------------------------------------+------------------------------------- Reporter: goldfire | Owner: goldfire Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Keywords: TypeInType | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- From Phab:D1739. When you say {{{ undefined :: forall (v :: Levity). forall (a :: TYPE v). (?callStack :: CallStack) => a }}} you get a skolem escape failure because GHC things that the kind of `(?callStack :: CallStack) => a` is `TYPE v`. It should be `*`. I will fix. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11405 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler