Hi! I understand the code on the wiki about what is wrong about the standard ListT and how to implement a correct version, but I’m wondering if there is already a package that provides such an implementation ready to use. I know the pipes package provides one, but since I don’t otherwise use pipes in my program I’d rather not depend on a big library like that only for a transformer. Is there any package that provides a correct ListT? Side question: is there a particular reason why Control.Monad.ListT doesn’t get fixed? Thank you, NIcola