- ghc-releases - Haskell.org

GHC 9.10.3-rc1 is now available
by Zubin Duggal 30 Jul '25

30 Jul '25

The GHC developers are very pleased to announce the availability of the release candidate for GHC 9.10.3. Binary distributions, source distributions, and documentation are available at [downloads.haskell.org][] and via [GHCup](https://www.haskell.org/ghcup/). GHC 9.10.3 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 11 August 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. [release notes]: https://gitlab.haskell.org/ghc/ghc/-/blob/ghc-9.10/docs/users_guide/9.10.3-… [status]: https://gitlab.haskell.org/ghc/ghc/-/wikis/GHC-status [downloads.haskell.org] https://downloads.haskell.org/ghc/9.10.3-rc1 [ticket]: https://gitlab.haskell.org/ghc/ghc/-/issues/new

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GHC 9.14.1 release status
by Ben Gamari 22 Jul '25

22 Jul '25

Hi all, Last week GHC 9.14 officially forked. Over the past week I have been working to get the branch into a releasable state. Unfortunately, there are currently issues with the Windows release target that which are preventing preparation of the first alpha. I hope to have this resolved by the end of this week, allowing our first pre-release in the middle of next week. Ultimately, it is not unlikely that the release schedule will slip a bit as a result of these Windows issues. We will keep the lists informed as the situation develops. Cheers, - Ben

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GHC LTS Releases
by Andreas Klebinger 15 Jul '25

15 Jul '25

I'm pleased to announce LTS plans for GHC Read all the details here: https://www.haskell.org/ghc/blog/20250702-ghc-release-schedules.html There is also a discourse thread if you have feedback: https://discourse.haskell.org/t/ghc-lts-releases-the-glasgow-haskell-compil… Best Wishes Andreas

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GHC 9.14 fork status
by Ben Gamari 13 Jun '25

13 Jun '25

Hi all, As those of you at Zurihac may know, we are currently in the process of preparing for the GHC 9.14 fork. This week I have been working through the various necessary core library version bumps and submodule changes. My hope is that we can land this work early next week and declare the fork at some point in the days that follow. I am aware of a few things that we want to land prior to forking: * @int-index's !14136 (Visible forall in GADTs) * testing and enabling of LLVM 20 support * an update of win32-tarballs * Cheng's libffi update (!14392) If you have any further work that you would like to see in 9.14 please do let me know by next Wednesday. If all goes well, my hope is that we can have our first alpha out by the end of this month, with an eye towards a final release in early September. Cheers, - Ben

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GHC 9.14 boot library status
by Ben Gamari 13 Jun '25

13 Jun '25

Hi all, This week I have been pushing through submodule updates and bounds bumps in preparation for the fork of the GHC 9.14 release. Today I have opened merge requests against those boot libraries which will require changes to integrate into 9.14; thankfully, it appears that these changes are all limited to bounds bumps this cycle. In keeping with our release management policy [1], I have updated GHC's submodules to reflect the current releases present on Hackage. I have also updated the submodule tracking spreadsheet [2] to reflect the expected boot library versions on release. Please have a look over the spreadsheet and if you would like to see anything changed here, update it accordingly at some point in the next few weeks. As always, thanks for your efforts! Cheers, - Ben [1] https://gitlab.haskell.org/ghc/ghc-hq/-/blob/main/release-management.mkd?re… [2] https://docs.google.com/spreadsheets/d/19WeWjXPh8Q64qoe3fjs8AswpTHk6uLBD8WG…

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GHC 9.10.2 is now available
by Zubin Duggal 03 May '25

03 May '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, including: * Significantly improved performance when dynamically loading Haskell symbols (#23415). * Fixing a bug where the simplifier sometimes destroyed join points during float out, which could impact performance (#24768). * Reduced memory fragmentation in the non-moving GC's segment allocator, improving resident set size by up to 26% for some applications (#24150). * Added new flags to control speculative evaluation (-fspec-eval and -fspec-eval-dictfun) to work around performance regressions (#25606). * Fixed several platform-specific issues, including segfaults with FFI on PowerPC (#23034) and improved code generation for AArch64 with multiway branches now using jump tables (#19912) * And many more! 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][]. 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, Zubin [release notes]: https://downloads.haskell.org/~ghc/9.10.2/docs/users_guide/9.10.2-notes.html [status]: https://gitlab.haskell.org/ghc/ghc/-/wikis/GHC-status [downloads.haskell.org] https://downloads.haskell.org/ghc/9.10.2 [ticket]: https://gitlab.haskell.org/ghc/ghc/-/issues/new

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GHC 9.10.2-rc1 is now available
by Ben Gamari 19 Apr '25

19 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.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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Updating Linux distribution support
by Ben Gamari 25 Mar '25

25 Mar '25

Hi all, For the last several releases GHC has distributed binary distributions for a largely-static set of Linux distributions, many quite old: | Distribution | End-of-life | Supported | | ------------------- | ------------ | ------------ | | Fedora 33 | Nov 2021 | no | | Fedora 38 | May 2024 | no | | Alpine 3.12 | May 2022 | no | | Alpine 3.18 | Apr 2025 | | | Alpine 3.20 | Apr 2026 | | | Debian 9 | Jul 2022 | no | | Debian 10 | Jun 2024 | no | | Debian 11 | Aug 2026 | | | Rocky 8 | May 2029 | | | Ubuntu 18.04 | May 2023 | no | | Ubuntu 20.04 | May 2025 | no | | Ubuntu 22.04 | Apr 2027 | | In #25876 I preliminarily propose that we whittle this down to the following, more up-to-date set for 9.14.1: | Distribution | End-of-life | | ------------------- | ------------ | | Fedora 41 | Nov 2025 | | Alpine 3.20 | Apr 2026 | | Debian 11 | Aug 2026 | | Debian 12 | Jun 2028 | | Rocky 8 | May 2029 | | Ubuntu 24.04 | Apr 2029 | If you have thoughts about this do let us know either via this list or on the ticket. Cheers, - Ben

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GHC 9.6.7 is now available
by Luite Stegeman 25 Mar '25

25 Mar '25

The GHC developers are very pleased to announce the availability of GHC 9.6.7. Binary distributions, source distributions, and documentation are available at https://downloads.haskell.org/ghc/9.6.7 We hope to have this release available via ghcup shortly. GHC 9.6.7 brings number of fixes, including: - GHC’s internal Unique type has been widened to 64-bits on 32-bit architectures, avoiding potential miscompilations on large projects. - Fix a runtime crash when using the compacting GC, caused by black holes in large objects. - Added new flags -fspec-eval and -fspec-eval-dictfun to allow switching off speculative evaluation. The following libraries have been updated since GHC 9.6.6: - base-4.18.3.0 - filepath-1.4.301.0 - unix-2.8.6.0 - bytestring-0.11.5.4 - array-0.5.8.0 A more detailed description can be found in the [release notes] and a full list of changes in [GHC!13841] and [GHC!13891] Note about Haskell Language Server and building GHC 9.8+: The change of Unique to 64 bit [GHC#22010] adds the exported symbol ghc_unique_counter64 to the RTS. Unfortunately it's impossible to avoid this without breaking other things. If you encounter a linker error related to ghc_unique_counter64 when building GHC (or building a GHC-derived package like ghc-lib-parser) with GHC 9.6.7, you probably have to add this [fix] to the program you're building. 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. Please give this release a try and open a [ticket] if you see anything amiss. ~ Luite [release notes]: https://downloads.haskell.org/ghc/9.6.7/docs/users_guide/9.6.7-notes.html [GHC!13841]: https://gitlab.haskell.org/ghc/ghc/-/merge_requests/13841 [GHC!13891]: https://gitlab.haskell.org/ghc/ghc/-/merge_requests/13891 [GHC#22010]: https://gitlab.haskell.org/ghc/ghc/-/issues/22010 [fix] https://gitlab.haskell.org/ghc/ghc/-/merge_requests/13743 [ticket] https://gitlab.haskell.org/ghc/ghc/-/issues/new

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