On Tue, Oct 6, 2015 at 1:41 PM, Sven Panne <svenpanne@gmail.com> wrote:

2015-10-06 18:47 GMT+02:00 Herbert Valerio Riedel <hvr@gnu.org>:
[...] That's because -Wall-hygiene (w/o opting out of harmless) warnings
across multiple GHC versions is not considered a show-stopper.

That's your personal POV, I'm more leaning towards "-Wall -Werror". I've seen too many projects where neglecting warning over an extended period of time made fixing them basically impossible at the end. Anyway, I think that a sane ecosystem should allow *both* POVs, the sloppy one and the strict one.

Note: You haven't been able to upload a package that has -Werror turned on in the cabal file for a couple of years now -- even if it is only turned on on the test suite, so any -Werror discipline you choose to enforce is purely local.

-Edward