Henning Thielemann lemming at henning-thielemann.de
Mon Feb 16 16:10:19 UTC 2015

On Mon, 16 Feb 2015, C Maeder wrote:

> -{-# LANGUAGE MultiParamTypeClasses, FlexibleInstances #-}
> +{-# LANGUAGE MultiParamTypeClasses, FlexibleInstances, FlexibleContexts #-}
> I'm not sure why FlexibleContexts is now needed and I'm not sure how the 
> package version number should change.

GHC-7.10 requires to declare LANGUAGE extensions also for the type 
signatures that you do not have written. Maybe this applies here.

More information about the Libraries mailing list