Add missing Monad/Traversable instances to tuples

Francesco Ariis fa-ml at
Tue Apr 2 12:16:55 UTC 2019

On Tue, Apr 02, 2019 at 08:53:10AM +0200, Henning Thielemann wrote:
> I think we discussed such instances at length in the past. Unfortunately, I
> cannot find the old discussion.

The discussion should be:

I recall someone (most likely yourself) sensibly proposing instance
warnings before shipping this.

> Btw. what happened to GHC-Trac? Now I need JavaScript to see the comments.
> :-(

Alas, that ship has sailed too:


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