#8230: GHCi 7.6.2 Crashes with GADT + DataKinds ------------------------------------+------------------------------------- Reporter: jozefg | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.2 Keywords: GADT | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- The following snippet caused GHCi to die {-# LANGUAGE GADTs, DataKinds #-} data A n where A :: A 0 with the following error message ghc: panic! (the 'impossible' happened) (GHC version 7.6.2 for x86_64-unknown-linux): lookupVers2 <<details unavailable>> Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8230 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler