#12590: GHC panics, -XTypeInType, possibly "cobox" related -------------------------------------+------------------------------------- Reporter: heisenbug | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- I get {{{ GHCi, version 8.1.20160902: http://www.haskell.org/ghc/ :? for help [1 of 1] Compiling Tree ( src/Tree.hs, interpreted ) ghc: panic! (the 'impossible' happened) (GHC version 8.1.20160902 for x86_64-apple-darwin): tcTyVarDetails cobox_a15m :: (n_a159[ssk] :: Peano) ~# ('Z :: Peano) }}} on the attached file. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12590 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler