#11048: Kind Incompatibility in GHC 7.6.3 ----------------------------------------+--------------------------------- Reporter: skatenerd | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: Linux Architecture: Unknown/Multiple | Type of failure: None/Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: ----------------------------------------+--------------------------------- In [https://github.com/skatenerd/vectorracing/commit/ddb950a3c89f7ba5aae84050d27... this commit] I have added a line with an intentionally missing dollar- sign. This should result in a mundane build failure, but instead, GHC produces this message: {{{ src/Main.hs:50:3: Couldn't match kind `* -> *' with `*' Expected type: Window -> Maybe Integer -> t0 Curses (Maybe Event) Actual type: Window -> Maybe Integer -> t0 Curses (Maybe Event) Kind incompatibility when matching types: Window :: * -> * Window :: * The function `lift'ghc: panic! (the 'impossible' happened) (GHC version 7.6.3 for x86_64-unknown-linux): kindFunResult ghc-prim:GHC.Prim.*{(w) tc 34d} Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11048 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler