<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body>
<p
style="margin-top: 0px; color: rgb(34, 34, 34); font-family: Arial, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">A
bug in 9.12.1 was reported and confirmed (ghc bug
<a class="moz-txt-link-freetext" href="https://gitlab.haskell.org/ghc/ghc/-/issues/25653">https://gitlab.haskell.org/ghc/ghc/-/issues/25653</a>) which can lead
to incorrect runtime results in compiled programs.</p>
<p
style="color: rgb(34, 34, 34); font-family: Arial, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">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.</p>
<p
style="color: rgb(34, 34, 34); font-family: Arial, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">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.</p>
</body>
</html>