Strange ghci :def failure

[Derek Elkins]

On Sat, 07 Jun 2003 20:35:55 +0200
George Russell <ger at tzi.de> wrote:

> What is wrong here?
> 
>    / _ \ /\  /\/ __(_)
>   / /_\// /_/ / /  | |      GHC Interactive, version 6.0, for Haskell
>   98.
> / /_\\/ __  / /___| |      http://www.haskell.org/ghc/
> \____/\/ /_/\____/|_|      Type :? for help.
> 
> Loading package base ... linking ... done.
> Prelude> :def code (\ "" -> do { let {getCode acc = do { next <-
> getLine ; if next == ":edoc" then return . unwords . reverse $ acc
> else getCode (next : acc)}} ; getCode [] } ) ghc-6.0: panic! (the
> `impossible' happened, GHC version 6.0):
> 	getLinkDeps No iface for [<pkg>]GHCziErr
> 
> Please report it as a compiler bug to
> glasgow-haskell-bugs at haskell.org, or
> http://sourceforge.net/projects/ghc/.

It seems to happen (also) just when a pattern match fails
   ___         ___ _
  / _ \ /\  /\/ __(_)
 / /_\// /_/ / /  | |      GHC Interactive, version 6.1, for Haskell 98.
/ /_\\/ __  / /___| |      http://www.haskell.org/ghc/
\____/\/ /_/\____/|_|      Type :? for help.

Loading package base ... linking ... done.
Prelude> case 5 of 3 -> 2
c:\ghc\GHC-BU~1\bin\ghc.exe: panic! (the `impossible' happened, GHC
version 6.1):
        getLinkDeps No iface for [<pkg>]GHCziErr

Please report it as a compiler bug to glasgow-haskell-bugs at haskell.org,
or http://sourceforge.net/projects/ghc/.

also (\[] -> 3) [2] does the same thing.