[GHC-Releases] PSA: Correctness issue in GHC-9.12.1

[Andreas Klebinger]

Today a bug in 9.12.1 was reported and confirmed (#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.
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