GHC 9.6.4 is now available

Zubin Duggal - 2024-01-09

The GHC developers are happy to announce the availability of GHC 9.6.4. Binary distributions, source distributions, and documentation are available on the release page.

This release is primarily a bugfix release addressing a few issues found in the 9.6 series. These include:

• A fix for a bug where certain warnings flags were not recognised (#24071)
• Fixes for a number of simplifier bugs (#23952, #23862).
• Fixes for compiler panics with certain package databases involving unusable units and module reexports (#21097, #16996, #11050).
• A fix for a typechecker crash (#24083).
• A fix for a code generator bug on AArch64 platforms resulting in invalid conditional jumps (#23746).
• Fixes for some memory leaks in GHCi (#24107, #24118)
• And a few other fixes

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.

Enjoy!

-Zubin