#14802: panic! (the 'impossible' happened) -------------------------------------+------------------------------------- Reporter: Ebanflo | Owner: (none) Type: bug | Status: infoneeded Priority: normal | Milestone: Component: Compiler | Version: 8.0.2 (Debugging) | Resolution: | Keywords: Operating System: Linux | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by hsyl20): You can use `stack` to easily launch a GHCi session for different GHC compiler versions: {{{ stack --resolver=ghc-8.0.1 repl --package vector --package primitive stack --resolver=ghc-8.0.2 repl --package vector --package primitive stack --resolver=ghc-8.2.2 repl --package vector --package primitive }}} Otherwise use `which ghci` to check which `ghci` is being used or use `ghc --interactive` instead of `ghci` (as `ghc -v` shows the expected version, it should work). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14802#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler