Readline on Windows?

Hi, Compiling the following program (Bug.hs): module Main where import System.Console.Readline main = do ms - readline Hi print ms Using GHC 6.2.2 on Windows XP, using the command line: ghc --make Bug -o bug Produces the following message: Chasing modules from: Bug Compiling

Derivable type classes bug?

Hi, Take a look at the following program, making use of derivable type classes. module Bug where import Data.Generics class Foo a where foo :: a - Int foo{| Unit |}_ = 1 foo{| a :*: b |} _ = 2 foo{| a :+: b |} _ = 3 instance Foo [a] GHC 6.2.2 produces the following error

[ ghc-Bugs-1069656 ] ghc-ghci inconsisteny

Bugs item #1069656, was opened at 2004-11-19 19:57 Message generated for change (Settings changed) made by simonmar You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=108032aid=1069656group_id=8032 Category: None Group: None Status: Closed Resolution: None Priority: 5

RE: Derivable type classes bug?

Yes, you guessed right. Your generic class declaration gives rise to instance declarations like | instance (Foo a, Foo b) = Foo (a :*: b) where | foo _ = 2 You suggest that it could be cleverer about guessing the context for the instance decl, and that would make sense. But this'd then be

[ ghc-Bugs-1071030 ] internal error: update_fwd: unknown/strange object 12238336

Bugs item #1071030, was opened at 2004-11-22 15:45 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detailatid=108032aid=1071030group_id=8032 Category: None Group: None Status: Open Resolution: None

RE: Readline on Windows?

On 16 November 2004 17:16, Koen Claessen wrote: Compiling the following program (Bug.hs): module Main where import System.Console.Readline main = do ms - readline Hi print ms Using GHC 6.2.2 on Windows XP, using the command line: ghc --make Bug -o bug Produces