Hi,
I get a reproducible crash with ghci 6.4 (ubuntu package version 6.4-4.1ubuntu2). I am using HList as retrieved yesterday from http://darcs.haskell.org/HList. If you need further details please let me know. I am also happy to meet on irc/gizmo/skype and talk it through in real-time. thanks, Matthias ====================================================================== module Main where import IO import Monad import List import Array import HListPrelude data T = T Int class C a where f :: C a -> Int instance C T where f (T i) = i class HList l => CList l instance CList HNil instance (C c, CList cs) => CList (HCons c cs) test :: (CList l) => l -> [Int] test = hMapOut f main :: IO () main = error "" ====================================================================== ___ ___ _ / _ \ /\ /\/ __(_) / /_\// /_/ / / | | GHC Interactive, version 6.4, for Haskell 98. / /_\\/ __ / /___| | http://www.haskell.org/ghc/ \____/\/ /_/\____/|_| Type :? for help. Loading package base-1.0 ... linking ... done. Prelude> :load /home/fis/tmp/Main.hs Compiling FakePrelude ( /home/fis/wiwi/reputation/esim/HList/FakePrelude.hs, interpreted ) Compiling HListPrelude ( /home/fis/wiwi/reputation/esim/HList/HListPrelude.hs, interpreted ) Compiling Main ( /home/fis/tmp/Main.hs, interpreted ) ghc-6.4: panic! (the `impossible' happened, GHC version 6.4): ds_app_type Main.C{tc r5nj} [a{tv a5oO}] Please report it as a compiler bug to , or http://sourceforge.net/projects/ghc/. > ======================================================================
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