Serious bug in GHC 9.4 on basic math on aarch64

Hi, We found a reproducible error with a simple math test (div/mod) on aarch64. (on linux, on macos), so we want to call for attention on this. https://gitlab.haskell.org/ghc/ghc/-/issues/22282 This was originally caught by this issue: https://github.com/haskell-foundation/foundation/issues/571 Thank you! Ian-Woo Kim Mercury Technologies

Thank you for bringing this bug to our attention Ian, we have triaged
it as highest priority and will include a fix in the next release in
the 9.4 series.
Cheers,
Matt
On Wed, Oct 12, 2022 at 12:46 AM Ian-Woo Kim
Hi,
We found a reproducible error with a simple math test (div/mod) on aarch64. (on linux, on macos), so we want to call for attention on this. https://gitlab.haskell.org/ghc/ghc/-/issues/22282 This was originally caught by this issue: https://github.com/haskell-foundation/foundation/issues/571
Thank you!
Ian-Woo Kim Mercury Technologies _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs

I've spread your message on r/haskell and Discourse:
*
https://www.reddit.com/r/haskell/comments/y215qi/serious_bug_in_ghc_94_on_ba...
*
https://discourse.haskell.org/t/serious-bug-in-ghc-9-4-on-basic-math-on-aarc...
Am Mi., 12. Okt. 2022 um 01:46 Uhr schrieb Ian-Woo Kim : Hi, We found a reproducible error with a simple math test (div/mod) on
aarch64. (on linux, on macos), so we want to call for attention on
this.
https://gitlab.haskell.org/ghc/ghc/-/issues/22282
This was originally caught by this issue:
https://github.com/haskell-foundation/foundation/issues/571 Thank you! Ian-Woo Kim
Mercury Technologies
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ghc-devs mailing list
ghc-devs@haskell.org
http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs

Thank you all very much for the quick actions. I see that the fix has been made and is under review! - Ian

agreed! This is a nasty one! (the only similar bug i remember in the past
is the double/float confusion in 7.6/7.8, but that was a much much harder
to trigger bug)
On Thu, Oct 13, 2022 at 1:37 PM Ian-Woo Kim
Thank you all very much for the quick actions. I see that the fix has been made and is under review!
- Ian _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
participants (4)
-
Carter Schonwald
-
Ian-Woo Kim
-
Matthew Pickering
-
Simon Jakobi