Thanks, a bug allright. This has been fixed in the current sources &
I believe the fix has been passed along to you via Mr MDo himself,
Levent Erkok. If not, let me know.
--sigbjorn
----- Original Message -----
From: "Iavor S. Diatchki" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, January 03, 2002 11:03
Subject: ST monad bug
> hi
>
> i run into a bug in the implementation if the ST monad:
>
> f = fixST $ const $ return 'z' >>= return
>
> Main> runST f
> '\
> Program error: Prelude.!!: negative index
>
>
> it looks like there is a bug with the pointers and the wrong type of thing
> gets written somewhere.
>
> here is another example:
> f = fixST $ const $ return 'z' >>= return . ord
>
> Main> runST f
> ('z',)
>
>
> bye
> iavor
>
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