--- On Wed, 8/27/08, Dan Weston <[EMAIL PROTECTED]> wrote:
>
> Failure to handle a null pointer is just like using
> fromJust and results
> in the same program termination (undefined).
>
> Dan
>
Well, not (IMHO) 'just like': 'fromJust Nothing' turns into a 'catchable'
exception in the IO Monad, but a SEGFAULT certainly doesn't.
E.g.
> import Control.Exception as C
> import Data.Maybe
> main = do
> (fromJust Nothing >>= ( \ s -> putStrLn s)) `C.catch`
> (\ _ -> putStrLn "ok")
prints 'ok', whereas:
> import Foreign.Ptr
> import Foreign.Storable
> import qualified Control.Exception as E
> main = poke nullPtr '\0' `E.catch` (\ _ -> putStrLn "ok")
just segfaults...
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