December 2024 - ghc-releases

GHC 9.10.2 preparation
by Ben Gamari 20 Dec '24

20 Dec '24

Hi all, Preparations are currently underway on GHC 9.10.2. We currently have roughly 100 commits backported with another few dozen backport candidates. If you have a merge request which you want to be backported please do make sure it bears the ~"backport needed:9.10" label. Additionally, we plan on performing the following boot library version bumps: Cabal 3.12.0.0 -> 3.12.1.0 Cabal-syntax 3.12.0.0 -> 3.12.1.0 bytestring 0.12.1.0 -> 0.12.2.0 array 0.5.7.0 -> 0.5.8.0 deepseq 1.5.0.0 -> 1.5.1.0 directory 1.3.8.3 -> 1.3.9.0 filepath 1.5.2.0 -> 1.5.4.0 hpc 0.7.0.1 -> 0.7.0.2 process 1.6.19.0 -> 1.6.25.0 text 2.1.1 -> 2.1.2 unix 2.8.5.1 -> 2.8.6.0 exceptions 0.10.7 -> 0.10.9 Win32 2.14.0.0 -> 2.14.1.0 Naturally, if we find that any of these upgrades could cause significant ecosystem disruption then we may reconsider and notify the list. If things go according to plan, we expect that a prerelease will be ready by mid-January 2025, with a final release coming a few weeks later. Naturally, we will continue to report status updates on the tracking ticket [1] and will keep ghc-releases apprised if plans change. Cheers, - Ben [1] https://gitlab.haskell.org/ghc/ghc/-/issues/25433

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GHC 9.6.7 plans
by Luite Stegeman 18 Dec '24

18 Dec '24

Hi all, I am currently in the process of preparing ghc-9.6.7 [1]. I'm planning for a release candidate to be ready on December 21st. If you need anything included that's not already listed, please reply in this thread or leave a comment in the tracking ticket [2], and apply the ~"backport needed:9.6" label. Already backported: * !13692: (setNumCapabilities: Assert that n_caps < MAX_N_CAPS) * !13618: rts/linker: Fix out-of-bounds mapping logic * !13544: DmdAnal: Make prompt# lazy (#25439 (closed)) * !13431: rts: fix pointer overflow undefined behavior in bytecode interpreter * !13371: Consider Wanteds with rewriters as not-insoluble * !13337: configure: Fix C++ probing when GCC version is the latest but G++ is old #23118 * !13276: Fix interaction between fork and kqueue (#24672 (closed)) * !13196: driver: Fix -working-dir for foreign files * !13151: JS: support rubbish static literals (#25177 (closed)) * !13113: AARCH64 linker: skip NONE relocations * !13096: Cmm: don't perform unsound optimizations on 32-bit compiler hosts (#24893 (closed) #24700 (closed)) * !13085: driver: Fix -Wmissing-home-modules when multiple units have the same module name * !13070: Only lookup ghcversion.h file in the RTS include-dirs by default. ( f954f428 ) * !13038: Address #25055 (closed), by disabling case-of-runRW# in Gentle phase * !13010: Linker: Add windows R_X86_64_PC64 relocation support * !12990: Fix -freg-graphs for FP and AARch64 NCG (#24941 (closed)). * !12975: X86 NCG: Fix argument promotion in foreign C calls ( a82121b3 ) * !12914: Linker: use m32 allocator for sections when NEED_PLT (#24432 (closed)) * !12748: rts: fix checkClosure error message * !12484: compiler: Fingerprint -fwrite-if-simplified-core * !12416: Don't generate wrappers for type data constructors with StrictData * !12201: RTS: Emit warning when -M < -H * !11989: Fix ffi callbacks with >6 args and non-64bit args. * !11777: GHCi: fix improper location of ghci_history file * !10520: Update rdt-theme to latest upstream version * !10436: rts: fix --disable-large-address-space * !10384: Simplify code and allow more optimisation on linearly typed code * !11878: release-ci: remove release-x86_64-linux-deb11-release+boot_nonmoving_gc job In progress: * !13524: hadrian: Bump directory bound to >=1.3.9 * !13252: Bump submodule array to 0.5.8.0 * !11020: Update Haddock submodule to fix #23368 * 13624: Widen uniques to 64 bit. Luite [1] https://gitlab.haskell.org/ghc/ghc/-/merge_requests/13740 [2] https://gitlab.haskell.org/ghc/ghc/-/issues/25559

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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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GHC 9.8.4 is now available
by Ben Gamari 02 Dec '24

02 Dec '24

The GHC developers are happy to announce the availability of GHC 9.8.4. Binary distributions, source distributions, and documentation are available on the [release] page. This release is a small release fixing a few issues noted in 9.8.3, including: * Update the `filepath` submodule to avoid a misbehavior of `splitFileName` under Windows. * Update the `unix` submodule to fix a compilation issue on `musl` platforms * Fix a potential source of miscompilation when building large projects on 32-bit platforms * Fix unsound optimisation of `prompt#` uses A full accounting of changes can be found in the [release notes]. As some of the fixed issues do affect correctness users are encouraged to upgrade promptly. We would like to thank Microsoft Azure, GitHub, IOG, the Zw3rk stake pool, Well-Typed, Tweag I/O, Serokell, Equinix, SimSpace, 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. Happy compiling! - Ben [release]: https://www.haskell.org/ghc/download_ghc_9_8_4.html [ticket]: https://gitlab.haskell.org/ghc/ghc/-/issues/new [release notes]: https://downloads.haskell.org/~ghc/9.8.4/docs/users_guide/9.8.4-notes.html

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GHC 9.8.4 release status
by Ben Gamari 02 Dec '24

02 Dec '24

Hi all, After several false-starts, I believe we now have a candidate pipeline [1] for the 9.8.4 release. This includes bumps to the unix and filepath submodules, a few compiler correctness fixes, and some documentation packaging improvements. Do let me know if there are any questions or concerns, otherwise I will move ahead with release mid-next week. Cheers, - Ben [1] https://gitlab.haskell.org/ghc/ghc/-/pipelines/103556

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