- Glasgow-haskell-users

GHC 9.10.2-rc1 is now available
by Ben Gamari 18 Apr '25

18 Apr '25

The GHC developers are very pleased to announce the availability of the release candidate for GHC 9.10.2. Binary distributions, source distributions, and documentation are available at [downloads.haskell.org][] and via [GHCup](https://www.haskell.org/ghcup/). GHC 9.10.2 is a bug-fix release fixing over 50 issues of a variety of severities and scopes. A full accounting of these fixes can be found in the [release notes][]. As always, GHC's release status, including planned future releases, can be found on the GHC Wiki [status][]. This release candidate will have a two-week testing period. If all goes well the final release will be available the week of 1 May 2025. We would like to thank Well-Typed, Tweag I/O, Juspay, QBayLogic, Channable, Serokell, SimSpace, the Haskell Foundation, and other anonymous contributors whose on-going financial and in-kind support has facilitated GHC maintenance and release management over the years. Finally, this release would not have been possible without the hundreds of open-source contributors whose work comprise this release. As always, do give this release a try and open a [ticket][] if you see anything amiss. Cheers, - Ben [release notes]: https://gitlab.haskell.org/ghc/ghc/-/blob/ghc-9.10/docs/users_guide/9.10.2-… [status]: https://gitlab.haskell.org/ghc/ghc/-/wikis/GHC-status [downloads.haskell.org] https://downloads.haskell.org/ghc/9.10.2-rc1 [ticket]: https://gitlab.haskell.org/ghc/ghc/-/issues/new

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GitLab maintenance this evening
by Ben Gamari 14 Apr '25

14 Apr '25

Hello all, Tonight GitLab will be down for maintenance between 17:00 EDT and 18:00 EDT as part of the on-going infrastructure migration. Cheers, - Ben

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gitlab.haskell.org reboot this evening
by Ben Gamari 31 Mar '25

31 Mar '25

Hi all, As part of finalizing the migration I will be rebooting gitlab.haskell.org at 17:00 EDT today. I expect the outage will last around 5 minutes. Cheers, - Ben

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gitlab.haskell.org outage this weekend
by Ben Gamari 30 Mar '25

30 Mar '25

Hi all, As you may know, Haskell.org is currently in the process of moving its infrastructure to new hosting facilities. As part of this effort, GHC's GitLab instance will be taken down for migration on Saturday 29 March 2025 from 09:00 to 17:00. This includes our issue tracker, CI infrastructure, Docker registry, serving of artifacts. Apologies for the inconvenience but we hope that this will be the last time we need to have such a prolonged outage in quite a while. Cheers, - Ben

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Haskell.org mailing list status
by Ben Gamari 20 Mar '25

20 Mar '25

Hi all, As you may have noticed, yesterday brought an unexpected influx of traffic from haskell.org's mailing lists. This was the result of fixing an interruption in mailing list message delivery which began in late February as a result of on-going infrastructure migration efforts. We are monitoring the situation to ensure that this issue does not recur but if you see anything amiss don't hesitate to contact admin(a)haskell.org. Thank you for your understanding and help! Cheers, - Ben

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GHC 9.12.2 is now available
by Ben Gamari 14 Mar '25

14 Mar '25

The GHC developers are happy to announce the release of GHC 9.12.2. Binary distributions, source distributions, and documentation are available at [downloads.haskell.org] We hope to have this release available via `ghcup` shortly. This is a small release fixing a critical code generation bug, #25653, affecting some subword division operations. As always, GHC's release status, including planned future releases, can be found on the GHC Wiki [status]. We would like to thank IOG, the Zw3rk stake pool, Well-Typed, Tweag I/O, Serokell, Equinix, SimSpace, the Haskell Foundation, and other anonymous contributors whose on-going financial and in-kind support has facilitated GHC maintenance and release management over the years. Finally, this release would not have been possible without the hundreds of open-source contributors who contribute their code, tickets, and energy to the GHC project. As always, do give this release a try and open a [ticket] if you see anything amiss. [release notes]: https://downloads.haskell.org/ghc/9.12.2/docs/users_guide/9.12.2-notes.html [status]: https://gitlab.haskell.org/ghc/ghc/-/wikis/GHC-status [downloads.haskell.org] https://downloads.haskell.org/ghc/9.12.2 [ticket]: https://gitlab.haskell.org/ghc/ghc/-/issues/new

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GHC 9.12.2-rc1 is now available
by Ben Gamari 27 Feb '25

27 Feb '25

The GHC developers are happy to announce the availability of the first and likely final release candidate of GHC 9.12.2. This is an important bug-fix release resolving a significant correctness issue present in 9.12.1 (#25653). In accordance with our under-discussion [release policies] this candidate will have a two-week testing window. The final 9.12.2 release will likely come the week of 12 March 2025. As always, if you find anything amiss please open a [ticket]. Happy Haskelling! - Ben [release policies]: https://gitlab.haskell.org/ghc/ghc-hq/-/merge_requests/38 [ticket]: https://gitlab.haskell.org/ghc/ghc/-/issues/new

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[PSA]: Correctness issue in GHC-9.12
by Andreas Klebinger 17 Jan '25

17 Jan '25

A bug in 9.12.1 was reported and confirmed (ghc bug https://gitlab.haskell.org/ghc/ghc/-/issues/25653) which can lead to incorrect runtime results in compiled programs. In particular this seems to happen for sub-word divisions with a known divisor when optimizations are enabled and affects at least the x86 backend, although it’s likely that other backends are also affected. We plan to release a bug fix release 9.12.2 in the near future to address this issue and recommend people do not upgrade until then.

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Re: GHC 9.12.1 is now available
by Zubin Duggal 16 Dec '24

16 Dec '24

Ah sorry, I accidentally called the tag ghc-9.12.1 instead of ghc-9.12.1-release. The correct tag should be pushed now. On 24/12/16 08:10, Shayne Fletcher wrote: >There does not appear to be a ghc-9.12.1-release branch? > >On Mon, Dec 16, 2024 at 5:21 AM Zubin Duggal <zubin(a)well-typed.com> wrote: > >> The GHC developers are very pleased to announce the release of GHC 9.12.1. >> Binary distributions, source distributions, and documentation are >> available at >> [downloads.haskell.org][]. >> >> We hope to have this release available via ghcup shortly. >> >> GHC 9.12 will bring a number of new features and improvements, including: >> >> * The new language extension [OrPatterns] allowing you to combine >> multiple >> pattern clauses into one. >> >> * The [MultilineStrings] language extension to allow you to more easily >> write >> strings spanning multiple lines in your source code. >> >> * Improvements to the OverloadedRecordDot extension, allowing the >> built-in >> `HasField` class to be used for records with fields of non lifted >> representations. >> >> * The [NamedDefaults] language extension has been introduced allowing >> you to >> define defaults for typeclasses other than `Num`. >> >> * More deterministic object code output, controlled by the >> `-fobject-determinism` >> flag, which improves determinism of builds a lot (though does not >> fully do so) >> at the cost of some compiler performance (1-2%). See #12935 for the >> details >> >> * GHC now accepts type syntax in expressions as part of [GHC Proposal >> #281]. >> >> * The WASM backend now has support for TemplateHaskell. >> >> * Experimental support for the RISC-V platform with the native code >> generator. >> >> * ... and many more >> >> A full accounting of changes can be found in the [release notes][]. >> As always, GHC's release status, including planned future releases, can >> be found on the GHC Wiki [status][]. >> >> We would like to thank GitHub, IOG, the Zw3rk stake pool, >> Well-Typed, Tweag I/O, Serokell, Equinix, SimSpace, the Haskell >> Foundation, and other anonymous contributors whose on-going financial >> and in-kind support has facilitated GHC maintenance and release >> management over the years. Finally, this release would not have been >> possible without the hundreds of open-source contributors whose work >> comprise this release. >> >> As always, do give this release a try and open a [ticket][] if you see >> anything amiss. >> >> >> [release notes]: >> https://downloads.haskell.org/ghc/9.12.1/docs/users_guide/9.12.1-notes.html >> [status]: https://gitlab.haskell.org/ghc/ghc/-/wikis/GHC-status >> [downloads.haskell.org] https://downloads.haskell.org/ghc/9.12.1 >> [ticket]: https://gitlab.haskell.org/ghc/ghc/-/issues/new >> [OrPatterns]: >> https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0522-o… >> [MultilineStrings]: >> https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0569-m… >> [GHC Proposal #281]: >> https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0281-v… >> [NamedDefaults]: >> https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0409-e… >> _______________________________________________ >> ghc-devs mailing list >> ghc-devs(a)haskell.org >> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs >> > > >-- >Shayne Fletcher

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GHC 9.12.1 is now available
by Zubin Duggal 16 Dec '24

16 Dec '24

The GHC developers are very pleased to announce the release of GHC 9.12.1. Binary distributions, source distributions, and documentation are available at [downloads.haskell.org][]. We hope to have this release available via ghcup shortly. GHC 9.12 will bring a number of new features and improvements, including: * The new language extension [OrPatterns] allowing you to combine multiple pattern clauses into one. * The [MultilineStrings] language extension to allow you to more easily write strings spanning multiple lines in your source code. * Improvements to the OverloadedRecordDot extension, allowing the built-in `HasField` class to be used for records with fields of non lifted representations. * The [NamedDefaults] language extension has been introduced allowing you to define defaults for typeclasses other than `Num`. * More deterministic object code output, controlled by the `-fobject-determinism` flag, which improves determinism of builds a lot (though does not fully do so) at the cost of some compiler performance (1-2%). See #12935 for the details * GHC now accepts type syntax in expressions as part of [GHC Proposal #281]. * The WASM backend now has support for TemplateHaskell. * Experimental support for the RISC-V platform with the native code generator. * ... and many more A full accounting of changes can be found in the [release notes][]. As always, GHC's release status, including planned future releases, can be found on the GHC Wiki [status][]. We would like to thank GitHub, IOG, the Zw3rk stake pool, Well-Typed, Tweag I/O, Serokell, Equinix, SimSpace, the Haskell Foundation, and other anonymous contributors whose on-going financial and in-kind support has facilitated GHC maintenance and release management over the years. Finally, this release would not have been possible without the hundreds of open-source contributors whose work comprise this release. As always, do give this release a try and open a [ticket][] if you see anything amiss. [release notes]: https://downloads.haskell.org/ghc/9.12.1/docs/users_guide/9.12.1-notes.html [status]: https://gitlab.haskell.org/ghc/ghc/-/wikis/GHC-status [downloads.haskell.org] https://downloads.haskell.org/ghc/9.12.1 [ticket]: https://gitlab.haskell.org/ghc/ghc/-/issues/new [OrPatterns]: https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0522-o… [MultilineStrings]: https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0569-m… [GHC Proposal #281]: https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0281-v… [NamedDefaults]: https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0409-e…

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