re-opening a closed stdin?

[Alastair Reid]

Simon Marlow:
> [Lazy I/O] is nice, but it introduces too many problems.  What
> happens to any I/O errors encountered by the lazy I/O?  They have to
> be discarded, which means you can't effectively use lazy I/O for
> robust applications anyway.

Surely they are thrown as exceptions which can then be manipulated
in pure code using 

  mapExceptions :: (Exception -> Exception) -> (a -> a)

and caught in the IO monad using catch?

--
Alastair