[ANNOUNCE] GHC 9.4.4 is now available

[David Feuer]

Does this release include the fix for #22549 (infinite loops for some
undecidable instances)?

On Sat, Dec 24, 2022, 5:36 PM Ben Gamari <ben at well-typed.com> wrote:

> The GHC developers are happy to announce the availability of GHC 9.4.4.
> Binary
> distributions, source distributions, and documentation are available at
> downloads.haskell.org [1].
>
> This release is primarily a bugfix release. Bugs fixed include:
>
> * An issue where the wrong labels were used in the eventlog for events
> emitted
>   when using info table profiling which was broken in 9.4.3 (#22452)
>
> * Fix a long standing bug where invalid eventlogs would be produced with
> long
>   command-lines (#20221)
>
> * Fix a regression in eta-expansion which resulted in serious performance
>   regressions in 9.4.3 (#22424)
>
> * Fix the `-fdefer-diagnostics` flag (#22391)
>
> * Fixes to several subtle compiler panics
>   (#22491, #22416, #22549, #22475, #22039)
>
> * Add necessary write barriers to `IORef` operations, avoiding potential
>   soundness issues on architectures with weakly-ordered memory models
>   (#22468)
>
> Note that, as GHC 9.4 is the first release series where the release
> artifacts
> are all generated by our new Hadrian build system, it is possible that
> there
> will be packaging issues. If you enounter trouble while using a binary
> distribution, please open a [ticket]. Likewise, if you are a downstream
> packager, do consider migrating to [Hadrian] to run your build; the Hadrian
> build system can be built using `cabal-install`, `stack`, or the in-tree
> [bootstrap script]. See the accompanying [blog post] for details on
> migrating packaging to Hadrian.
>
> We would also like to emphasize that GHC 9.4 must be used in conjunction
> with
> Cabal-3.8 or later. This is particularly important for Windows users due to
> changes in GHC's Windows toolchain.
>
> 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 Haskelling,
>
> - Ben
>
>
> [1]: https://downloads.haskell.org/ghc/9.4.4
> [ticket]: https://gitlab.haskell.org/ghc/ghc/-/issues/new
> [bootstrap script]:
> https://gitlab.haskell.org/ghc/ghc/-/blob/e2520df3fffa0cf22fb19c5fb872832d11c07d35/hadrian/bootstrap/README.md
> [Hadrian]:
> https://gitlab.haskell.org/ghc/ghc/-/blob/e2520df3fffa0cf22fb19c5fb872832d11c07d35/hadrian
> [blog post]:
> https://www.haskell.org/ghc/blog/20220805-make-to-hadrian.html
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>
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