#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
[email protected]
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
