sorting failed error

[Ellery Newcomer]

On 07/30/2012 05:36 AM, maarten van damme wrote:
>
> I have no idea what is wrong with my code and the error is not very informative.
> Does anyone have any idea as to what the problem could be?
>

Congratulations, it looks like you've hit a compiler bug.

http://d.puremagic.com/issues/show_bug.cgi?id=8476

quickest fix: change return type of fitness to real.