GHC 8.0.2 status

Simon Peyton Jones simonpj at
Tue Oct 4 08:38:53 UTC 2016

Smoke-testing with Stackage would be a great idea.  In the past Michael Snoyman has kindly done that for us, but ultimately some automation would be good.


From: ghc-devs [mailto:ghc-devs-bounces at] On Behalf Of Boespflug, Mathieu
Sent: 04 October 2016 07:59
To: Ben Gamari <ben at>
Cc: ghc-devs at
Subject: Re: GHC 8.0.2 status

Hi Ben,

while in the eye of the cyclone, as we're waiting for these last few OS X issues to clear up... I was wondering, do you currently have a means to "vet" release candidates before cutting a new release?

More to the point, to check that a point release like these doesn't include any breaking changes it might be useful to try compiling all of Stackage with it, even if it's just once, much like the Stackage curators do. As you may have seen a few hours ago, e.g. singletons doesn't compile using the current GHC 8.0.2 candidate (tip of ghc-8.0 branch). It did compile just fine using 8.0.1. And FWIW it also compiles okay with GHC HEAD.

Likely this has been discussed before. So I'm just enquiring about status regarding adding this item in the workflow.


Mathieu Boespflug
Founder at<>.

On 29 September 2016 at 19:54, Ben Gamari <ben at<mailto:ben at>> wrote:
Hello everyone,

The week before ICFP I was able to get the ghc-8.0 branch ready for an
8.0.2 release, which I intended to cut this week. In the intervening
time an additional rather serious issue was reported affected Mac OS X
Sierra (#12479). Since this issue affects the usability of GHC on the
new OS X release, we'll be deferring the 8.0.2 release until it has been

While there appears to be an actionable path forward on this ticket, we
will need someone with an affected machine and an understanding of GHC's
use of dynamic linking to step up to implement. Otherwise it looks like
the release will be delayed at least until October 9, when darchon has
time to have a look.

Sorry to be the bearer of bad news!


- Ben

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