#13951: InScope set assertion failure from monad-skeleton -------------------------------------+------------------------------------- Reporter: mpickering | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by monoidal): I've reduced to: {{{ #!hs {-# LANGUAGE PolyKinds, Rank2Types #-} module T13951 where viewL :: forall k. Bool -> (forall x. k x -> Int) -> Int viewL False _ = 0 viewL True r = r undefined }}} (note this is now a warning, not an assertion failure) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13951#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler