[Haskell-cafe] does try force evaluation of IO value

[s9gf4ult at gmail.com]

>   Prelude Control.Exception> r <- try (return $ error "bam") :: IO (Either
> SomeException Int) Prelude Control.Exception> r
>   Right *** Exception: bam
Wow, this is realy breaking news for me. Where can i read more about this 
magic ?