On 3/12/07, Kirsten Chevalier <[EMAIL PROTECTED]> wrote:
On 3/12/07, Albert Y. C. Lai <[EMAIL PROTECTED]> wrote:
> main = print (map (const 'x') (take 1 (undefined:undefined)))
>
> In ghci, or with ghc -O0, this produces "x".
> With ghc -O, this produces Prelude.undefined.
>
What version of ghc?
I was curious, so I checked this against ghc 6.6. Indeed, it exhibits
the behavior Albert describes above. Same goes for the HEAD. In ghc
6.4.2, however, the program prints "x" whether compiled with -O or
-O0.
This does seem like a bug to me.
Cheers,
Kirsten
--
Kirsten Chevalier* [EMAIL PROTECTED] *Often in error, never in doubt
"Live fast, love hard, and wear corrective lenses if you need them."
--Webb Wilder
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