Export lists in modules

[Simon Marlow]

On 28 February 2006 13:37, Lennart Augustsson wrote:

> John Meacham wrote:
>> 
>> I mean, even a for loop in haskell is done as
>> mapM action [0..10]
>> 
>> I'd say _most_ uses of lists are deforested away because they are
>> used to express control and dataflow and arn't actually used as
>> persistant structures.
> 
> Yes, they are optimized away when ghc actually works. :)  At the
> moment this seems to be broken (try length[1..n] in 6.4.1).

Known bug (well, known since a few weeks ago at least).

http://cvs.haskell.org/trac/ghc/ticket/683

Cheers,
	Simon