[tmhedberg]

There's some info here: http://www.reddit.com/r/haskell/comments/2pnjdk/is_overloade....

tl;dr: The patch worked but was messy/overly complex, so it needs refactoring before it's merged.

[kxyvr]

That's a shame and the first I've heard of the delay. For me and the software that I write, this is a must have feature and I was very much looking forward to its release.

[mijoharas]

Only just saw this, thanks for the info.