GHC 9.6.7 is now available

[Shayne Fletcher]

the tag ghc repo tag ghc-9.6.7-release has not been created. please fix.

On Mon, Mar 24, 2025 at 2:44 AM Luite Stegeman <stegeman at gmail.com> wrote:

> 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/-/merge_requests/13891%5BGHC#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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> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
>


-- 
Shayne Fletcher
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