#9683: ghc: panic! (the 'impossible' happened) [Cant do annotations without GHCi] -----------------------------+--------------------------------------- Reporter: jeffmaner | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.4.1 Keywords: | Operating System: Linux Architecture: arm | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -----------------------------+--------------------------------------- The Haskell Platform instructed me to report this as a bug. :) I'm trying to install The Haskell Platform on my Samsung Chromebook, using the wheezy chroot (armv7l GNU/Linux). Actually, I'm trying to install Elm. I've installed the Platform. Installing Elm via `cabal install Elm-0.13 elm-repl-0.3 elm-reactor-0.1 elm-get-0.1.3` , I eventually encounter: [ 3 of 19] Compiling Data.Vector.Fusion.Stream.Size ( Data/Vector/Fusion/Stream/Size.hs, dist/build/Data/Vector/Fusion/Stream/Size.o ) Data/Vector/Fusion/Stream/Size.hs:25:10: Warning: No explicit method nor default method for `*' In the instance declaration for `Num Size' Data/Vector/Fusion/Stream/Size.hs:25:10: Warning: No explicit method nor default method for `abs' In the instance declaration for `Num Size' Data/Vector/Fusion/Stream/Size.hs:25:10: Warning: No explicit method nor default method for `signum' In the instance declaration for `Num Size' [ 4 of 19] Compiling Data.Vector.Internal.Check ( Data/Vector/Internal/Check.hs, dist/build/Data/Vector/Internal/Check.o ) [ 5 of 19] Compiling Data.Vector.Fusion.Stream.Monadic ( Data/Vector/Fusion/Stream/Monadic.hs, dist/build/Data/Vector/Fusion/Stream/Monadic.o ) ghc: panic! (the 'impossible' happened) (GHC version 7.4.1 for arm-unknown-linux): Cant do annotations without GHCi {Data/Vector/Fusion/Stream/Monadic.hs:104:19-33} base:GHC.Exts.ForceSpecConstr{d raqj} Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9683 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler