Support GHC-9.12

[phadej]

With

cabal --version 
cabal-install version 3.14.1.0
compiled using version 3.14.1.0 of the Cabal library 

I get a warning

Warning: Unknown/unsupported 'ghc' version detected (Cabal 3.14.1.0 supports
'ghc' version < 9.12): /opt/ghcup/.ghcup/bin/ghc-9.12.1 is version 9.12.1

[ulysses4ever]

Thanks for the report! This has been fixed on master several days ago. Releasing 3.14 with this warning is indeed unfortunate.

[geekosaur]

@Kleidukos (and I to some extent since I've kinda been "head elf" for the past few releases) are working on a 3.14.1.1 point release with this fix and another one affecting i386.

[geekosaur]

We are also hoping that we can get this into the ghcup and stack releases, even if it's too late to get the downloads.haskell.org one updated.

I also have a proposed workflow to catch this versioning issue. The i386 one is harder as (a) we don't (yet) have a validate run for it and (b) so far the only program known to trigger it is ghcup, which would require writing a new test to build and run it to trigger the bug.