[PSA]: Correctness issue in GHC-9.12

[Andreas Klebinger]

A bug in 9.12.1 was reported and confirmed (ghc bug
https://gitlab.haskell.org/ghc/ghc/-/issues/25653) which can lead to
incorrect runtime results in compiled programs.

In particular this seems to happen for sub-word divisions with a known
divisor when optimizations are enabled and affects at least the x86
backend, although it’s likely that other backends are also affected.

We plan to release a bug fix release 9.12.2 in the near future to
address this issue and recommend people do not upgrade until then.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/ghc-devs/attachments/20250117/df8fb8fc/attachment.html>