GHC 7.8.3 release

Manuel M T Chakravarty chak at
Tue May 27 09:11:09 UTC 2014

I believe #9078 affects all EDSLs that use Andy Gill’s stable name method to implement observable sharing. It certainly crashes Accelerate.

I would very much appreciate if 7.8.3 would be released in time to make it into the upcoming Haskell Platform. (If the platform would ship with 7.8.2., that would be a quite bad for all affected EDSL libraries.)

Do we know the projected release date for the platform?


PS: For Accelerate, the situation is actually rather awkward right now. Due to the changes re ambiguous signatures in GHC 7.8, Accelerate needs to introduce a breaking API change to compile with 7.8. However, we can’t really fully transition to 7.8 until #9078 is fixed.

Austin Seipp <austin at>:
> Hello all,
> After a long week, I've finally gotten a little time to reply to
> emails, and I mainly have one question I'd like to ask.
> First, please direct your attention to this:
> This is the 7.8.3 milestone, but it only considers things that are:
> - 1) Fixed
> - 2) Going to be merged
> - 3) Are a patch to be still merged.
> That is, it is a solid representation of the difference between 7.8.2
> and the 7.8 branch tip.
> The question is: when should we do the release? There are several bugs
> there that seem quite problematic for users - #9045, #7097, #9001,
> #8768 and #9078 in particular.
> If these bugs are really problematic (and I sort of feel they are)
> then the release can happen soon. I can do it within a week from now,
> and we could punt more to a 7.8.4 release.
> I ask this because my time to dedicate to GHC is a bit thin right now,
> so you must help me decide what's important! So please let me know -
> just a general vote in favor of doing it within some X timeframe (even
> 'real soon' or 'a week would be great') would be nice.
> PS: I apologize for the lack of status updates and brief email - my
> time for GHC has been in very short order the past two weeks in
> particular, and I've finally just returned to a computer (not mine)
> for right now to ask this.
> PPS: This might also impact the 7.10 schedule, but last Simon and I
> talked, we thought perhaps shooting for ICFP this time (and actually
> hitting it) was a good plan. So I'd estimate on that a 7.8.4 might
> happen a few months from now, after summer.
> -- 
> Regards,
> Austin Seipp, Haskell Consultant
> Well-Typed LLP,
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> Glasgow-haskell-users at

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