#6141: ghc: panic! (the 'impossible' happened) ---------------------------------------+------------------------------------ Reporter: aSect | Owner: Type: bug | Status: new Priority: normal | Component: Compiler Version: 7.4.1 | Keywords: Os: Linux | Architecture: x86_64 (amd64) Failure: GHC rejects valid program | Testcase: Blockedby: | Blocking: Related: | ---------------------------------------+------------------------------------ i tried to load the following code in ghci:
{-# OPTIONS_GHC -Wall -O2 #-} module Main where import Data.Map (Map) import qualified Data.Map as Map data Vertex a = Vertex { vname :: a } deriving (Show, Read, Eq) data Edge a = Edge { xedge :: a , yedge :: a } deriving (Show, Read, Eq) data Graph a = Graph { vertexes :: [Vertex a] , edges :: [Edge a] , adjacents :: Vertex a -> [Vertex a] } deriving (show, Read, Eq) and then i got the following error: ghc: panic! (the 'impossible' happened) (GHC version 7.4.1 for x86_64-unknown-linux): nameModule show{tv a25N} -- Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6141> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler _______________________________________________ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs