Re: GHC 9.12.4-rc1 is now available
George Colpitts <[email protected]> Wed, 18 Mar 2026 13:34:15 -0300
| Newsgroups | gmane.comp.lang.haskell.cafe,gmane.comp.lang.haskell.ghc.devel,gmane.comp.lang.haskell.glasgow.user |
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| Message-ID | <CAB-d4A4559cmfw-4VKrH-6gOdFCoyYfdy9TPC-mPK0-3XtPTGQ@mail.gmail.com> |
--===============9217840408326267374== Content-Type: multipart/alternative; boundary="000000000000f7e873064d4f07c0" --000000000000f7e873064d4f07c0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable My apologies, very sorry. I got the good output and bad output backwards. It is fixed. Very sorry to bother everybody. On Wed, Mar 18, 2026 at 11:22=E2=80=AFAM Zubin Duggal <[email protected]= > wrote: > Can you clarify what behavior you are seeing? I just tested > with fresh install > > =E2=9D=AF test/bin/ghc --version > The Glorious Glasgow Haskell Compilation System, version 9.12.3.20260311 > =E2=9D=AF test/bin/ghc $PROJECT_DIR/Main.hs -fforce-recomp > [1 of 2] Compiling Main ( /home/zubin/ghcs/exprType/Main.hs, > /home/zubin/ghcs/exprType/Main.o ) > [2 of 2] Linking /home/zubin/ghcs/exprType/Main [Objects changed] > =E2=9D=AF cat $PROJECT_DIR/Main.hs > {-# OPTIONS_GHC -O #-} > > import Data.Word > > prop :: Word8 -> IO () > prop x =3D do > print (x, x `quot` 7, x `rem` 7, x `quotRem` 7) > {-# NOINLINE prop #-} > > main :: IO () > main =3D prop 0 > =E2=9D=AF /home/zubin/ghcs/exprType/Main > (0,0,0,(0,0)) > > On 26/03/18 11:01, George Colpitts wrote: > >Hello > > > >Below it states > > > > - Fixed a critical code generation regression where sub-word division > > produced incorrect results (#26711 </ghc/ghc/-/issues/26711>, #26668 > > (closed) </ghc/ghc/-/issues/26668>), similar to the bug fixed in 9.12= .2 > > > >However when I test 26711 it on 9.12.3.20260311 ( 9.12.3.20260311) on my > >Apple Silicon Mac it is still broken, I've updated 26711. Maybe the abov= e > >means that just 26668 is fixed but 26711 is not? > > > >On Fri, Mar 13, 2026 at 6:15=E2=80=AFAM Zubin Duggal via ghc-devs < > >[email protected]> wrote: > > > >> The GHC developers are very pleased to announce the availability > >> of the release candidate for GHC 9.12.4. Binary distributions, source > >> distributions, and documentation are available at [ > downloads.haskell.org][] > >> and > >> via [GHCup](https://www.haskell.org/ghcup/). > >> > >> GHC 9.12.4 is a bug-fix release fixing many issues of a variety of > >> severities and scopes, including: > >> > >> * Fixed a critical code generation regression where sub-word division > >> produced > >> incorrect results (#26711, #26668), similar to the bug fixed in > 9.12.2 > >> * Numerous fixes for register allocation bugs, preventing data > corruption > >> when spilling and reloading registers > >> (#26411, #26526, #26537, #26542, #26550) > >> * Fixes for several compiler crashes, including issues with > >> CSE (#25468), SetLevels (#26681), > >> implicit parameters (#26451), and the type-class specialiser (#2668= 2) > >> * Fixed cast worker/wrapper incorrectly firing on INLINE functions > (#26903) > >> * Fixed LLVM backend miscompilation of bit manipulation operations > >> (#20645, #26065, #26109) > >> * Fixed associated type family and data family instance changes not > >> triggering > >> recompilation (#26183, #26705) > >> * Fixed negative type literals causing the compiler to hang (#26861) > >> * Improvements to determinism of compiler output (#26846, #26858) > >> * Fixes for eventlog shutdown deadlocks (#26573) > >> and lost wakeups in the RTS (#26324) > >> * Fixed split sections support on Windows (#26696, #26494) and the LLV= M > >> backend (#26770) > >> * Fixes for the bytecode compiler, PPC native code generator, and Wasm > >> backend > >> * The runtime linker now supports COMMON symbols (#6107) > >> * Improved backtrace support: backtraces for `error` exceptions are no= w > >> evaluated at throw time > >> * `NamedDefaults` now correctly requires the class to be standard or > have > >> an > >> in-scope default declaration, and handles poly-kinded classes > (#25775, > >> #25778, #25882) > >> * ... and many more > >> > >> A full accounting of these fixes can be found in the > >> [release notes][]. As always, GHC's release status, including planned > >> future > >> releases, can be found on the GHC Wiki [status][]. > >> > >> This release candidate will have a two-week testing period. If all goe= s > >> well > >> the final release will be available the week of 26 March 2026. > >> > >> GHC development is sponsored by: > >> > >> * [Juspay](https://juspay.com/) > >> * [QBayLogic](https://qbaylogic.com/) > >> * [Channable](https://www.channable.com/) > >> * [Haskell Foundation](https://haskell.foundation/) > >> * [Serokell](https://serokell.io/) > >> * [Well-Typed](https://well-typed.com/) > >> * [Tweag](https://www.tweag.io/) > >> * [Dotcom-Monitor](https://www.dotcom-monitor.com/) > >> * [LoadView](https://www.loadview-testing.com/) > >> * [Web Hosting Buddy](https://webhostingbuddy.com/) > >> * [Find My Electric](https://www.findmyelectric.com/) > >> * [Standard Chartered](https://www.sc.com) > >> * [UpCloud](https://upcloud.com) > >> * [Mercury](https://mercury.com) > >> > >> We would like to thank these sponsors and other anonymous contributors > >> whose on-going financial and in-kind support has facilitated GHC > >> maintenance > >> and release management over the years. Finally, this release would not > have > >> been possible without the hundreds of open-source contributors whose > work > >> comprise this release. > >> > >> As always, do give this release a try and open a [ticket][] if you see > >> anything amiss. > >> > >> [release notes]: > >> > https://gitlab.haskell.org/ghc/ghc/-/blob/ghc-9.12/docs/users_guide/9.12.= 4-notes.rst?ref_type=3Dheads&plain=3D1 > >> [status]: https://gitlab.haskell.org/ghc/ghc/-/wikis/GHC-status > >> [downloads.haskell.org]: https://downloads.haskell.org/ghc/9.12.4-rc1 > >> [ticket]: https://gitlab.haskell.org/ghc/ghc/-/issues/new > >> _______________________________________________ > >> ghc-devs mailing list -- [email protected] > >> To unsubscribe send an email to [email protected] > >> > --000000000000f7e873064d4f07c0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:times ne= w roman,serif;font-size:large">My apologies, very sorry. I got the good out= put and bad output backwards. It is fixed. Very sorry to bother everybody.<= /div></div><br><div class=3D"gmail_quote gmail_quote_container"><div dir=3D= "ltr" class=3D"gmail_attr">On Wed, Mar 18, 2026 at 11:22=E2=80=AFAM Zubin D= uggal <<a href=3D"mailto:[email protected]">[email protected]</a>&= gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0= px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Can y= ou clarify what behavior you are seeing? I just tested<br> with fresh install<br> <br> =E2=9D=AF test/bin/ghc --version<br> The Glorious Glasgow Haskell Compilation System, version 9.12.3.20260311<br= > =E2=9D=AF test/bin/ghc $PROJECT_DIR/Main.hs -fforce-recomp<br> [1 of 2] Compiling Main=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0( /h= ome/zubin/ghcs/exprType/Main.hs, /home/zubin/ghcs/exprType/Main.o )<br> [2 of 2] Linking /home/zubin/ghcs/exprType/Main [Objects changed]<br> =E2=9D=AF cat $PROJECT_DIR/Main.hs<br> {-# OPTIONS_GHC -O #-}<br> <br> import Data.Word<br> <br> prop :: Word8 -> IO ()<br> prop x =3D do<br> =C2=A0 =C2=A0print (x, x `quot` 7, x `rem` 7, x `quotRem` 7)<br> {-# NOINLINE prop #-}<br> <br> main :: IO ()<br> main =3D prop 0<br> =E2=9D=AF /home/zubin/ghcs/exprType/Main<br> (0,0,0,(0,0))<br> <br> On 26/03/18 11:01, George Colpitts wrote:<br> >Hello<br> ><br> >Below it states<br> ><br> >=C2=A0 =C2=A0- Fixed a critical code generation regression where sub-wo= rd division<br> >=C2=A0 =C2=A0produced incorrect results (#26711 </ghc/ghc/-/issues/2= 6711>, #26668<br> >=C2=A0 =C2=A0(closed) </ghc/ghc/-/issues/26668>), similar to the = bug fixed in 9.12.2<br> ><br> >However when I test 26711 it on 9.12.3.20260311 ( 9.12.3.20260311) on m= y<br> >Apple Silicon Mac it is still broken, I've updated 26711. Maybe the= above<br> >means that just 26668 is fixed but 26711 is not?<br> ><br> >On Fri, Mar 13, 2026 at 6:15=E2=80=AFAM Zubin Duggal via ghc-devs <<= br> ><a href=3D"mailto:[email protected]" target=3D"_blank">ghc-devs@hask= ell.org</a>> wrote:<br> ><br> >> The GHC developers are very pleased to announce the availability<b= r> >> of the release candidate for GHC 9.12.4. Binary distributions, sou= rce<br> >> distributions, and documentation are available at [<a href=3D"http= ://downloads.haskell.org" rel=3D"noreferrer" target=3D"_blank">downloads.ha= skell.org</a>][]<br> >> and<br> >> via [GHCup](<a href=3D"https://www.haskell.org/ghcup/" rel=3D"nore= ferrer" target=3D"_blank">https://www.haskell.org/ghcup/</a>).<br> >><br> >> GHC 9.12.4 is a bug-fix release fixing many issues of a variety of= <br> >> severities and scopes, including:<br> >><br> >> * Fixed a critical code generation regression where sub-word divis= ion<br> >> produced<br> >>=C2=A0 =C2=A0 incorrect results (#26711, #26668), similar to the bu= g fixed in 9.12.2<br> >> * Numerous fixes for register allocation bugs, preventing data cor= ruption<br> >>=C2=A0 =C2=A0 when spilling and reloading registers<br> >>=C2=A0 =C2=A0 (#26411, #26526, #26537, #26542, #26550)<br> >> * Fixes for several compiler crashes, including issues with<br> >>=C2=A0 =C2=A0 CSE (#25468), SetLevels (#26681),<br> >>=C2=A0 =C2=A0 implicit parameters (#26451), and the type-class spec= ialiser (#26682)<br> >> * Fixed cast worker/wrapper incorrectly firing on INLINE functions= (#26903)<br> >> * Fixed LLVM backend miscompilation of bit manipulation operations= <br> >>=C2=A0 =C2=A0 (#20645, #26065, #26109)<br> >> * Fixed associated type family and data family instance changes no= t<br> >> triggering<br> >>=C2=A0 =C2=A0 recompilation (#26183, #26705)<br> >> * Fixed negative type literals causing the compiler to hang (#2686= 1)<br> >> * Improvements to determinism of compiler output (#26846, #26858)<= br> >> * Fixes for eventlog shutdown deadlocks (#26573)<br> >>=C2=A0 =C2=A0 and lost wakeups in the RTS (#26324)<br> >> * Fixed split sections support on Windows (#26696, #26494) and the= LLVM<br> >> backend (#26770)<br> >> * Fixes for the bytecode compiler, PPC native code generator, and = Wasm<br> >> backend<br> >> * The runtime linker now supports COMMON symbols (#6107)<br> >> * Improved backtrace support: backtraces for `error` exceptions ar= e now<br> >>=C2=A0 =C2=A0 evaluated at throw time<br> >> * `NamedDefaults` now correctly requires the class to be standard = or have<br> >> an<br> >>=C2=A0 =C2=A0 in-scope default declaration, and handles poly-kinded= classes (#25775,<br> >> #25778, #25882)<br> >> * ... and many more<br> >><br> >> A full accounting of these fixes can be found in the<br> >> [release notes][]. As always, GHC's release status, including = planned<br> >> future<br> >> releases, can be found on the GHC Wiki [status][].<br> >><br> >> This release candidate will have a two-week testing period. If all= goes<br> >> well<br> >> the final release will be available the week of 26 March 2026.<br> >><br> >> GHC development is sponsored by:<br> >><br> >>=C2=A0 =C2=A0* [Juspay](<a href=3D"https://juspay.com/" rel=3D"nore= ferrer" target=3D"_blank">https://juspay.com/</a>)<br> >>=C2=A0 =C2=A0* [QBayLogic](<a href=3D"https://qbaylogic.com/" rel= =3D"noreferrer" target=3D"_blank">https://qbaylogic.com/</a>)<br> >>=C2=A0 =C2=A0* [Channable](<a href=3D"https://www.channable.com/" r= el=3D"noreferrer" target=3D"_blank">https://www.channable.com/</a>)<br> >>=C2=A0 =C2=A0* [Haskell Foundation](<a href=3D"https://haskell.foun= dation/" rel=3D"noreferrer" target=3D"_blank">https://haskell.foundation/</= a>)<br> >>=C2=A0 =C2=A0* [Serokell](<a href=3D"https://serokell.io/" rel=3D"n= oreferrer" target=3D"_blank">https://serokell.io/</a>)<br> >>=C2=A0 =C2=A0* [Well-Typed](<a href=3D"https://well-typed.com/" rel= =3D"noreferrer" target=3D"_blank">https://well-typed.com/</a>)<br> >>=C2=A0 =C2=A0* [Tweag](<a href=3D"https://www.tweag.io/" rel=3D"nor= eferrer" target=3D"_blank">https://www.tweag.io/</a>)<br> >>=C2=A0 =C2=A0* [Dotcom-Monitor](<a href=3D"https://www.dotcom-monit= or.com/" rel=3D"noreferrer" target=3D"_blank">https://www.dotcom-monitor.co= m/</a>)<br> >>=C2=A0 =C2=A0* [LoadView](<a href=3D"https://www.loadview-testing.c= om/" rel=3D"noreferrer" target=3D"_blank">https://www.loadview-testing.com/= </a>)<br> >>=C2=A0 =C2=A0* [Web Hosting Buddy](<a href=3D"https://webhostingbud= dy.com/" rel=3D"noreferrer" target=3D"_blank">https://webhostingbuddy.com/<= /a>)<br> >>=C2=A0 =C2=A0* [Find My Electric](<a href=3D"https://www.findmyelec= tric.com/" rel=3D"noreferrer" target=3D"_blank">https://www.findmyelectric.= com/</a>)<br> >>=C2=A0 =C2=A0* [Standard Chartered](<a href=3D"https://www.sc.com" = rel=3D"noreferrer" target=3D"_blank">https://www.sc.com</a>)<br> >>=C2=A0 =C2=A0* [UpCloud](<a href=3D"https://upcloud.com" rel=3D"nor= eferrer" target=3D"_blank">https://upcloud.com</a>)<br> >>=C2=A0 =C2=A0* [Mercury](<a href=3D"https://mercury.com" rel=3D"nor= eferrer" target=3D"_blank">https://mercury.com</a>)<br> >><br> >> We would like to thank these sponsors and other anonymous contribu= tors<br> >> whose on-going financial and in-kind support has facilitated GHC<b= r> >> maintenance<br> >> and release management over the years. Finally, this release would= not have<br> >> been possible without the hundreds of open-source contributors who= se work<br> >> comprise this release.<br> >><br> >> As always, do give this release a try and open a [ticket][] if you= see<br> >> anything amiss.<br> >><br> >> [release notes]:<br> >> <a href=3D"https://gitlab.haskell.org/ghc/ghc/-/blob/ghc-9.12/docs= /users_guide/9.12.4-notes.rst?ref_type=3Dheads&plain=3D1" rel=3D"norefe= rrer" target=3D"_blank">https://gitlab.haskell.org/ghc/ghc/-/blob/ghc-9.12/= docs/users_guide/9.12.4-notes.rst?ref_type=3Dheads&plain=3D1</a><br> >> [status]: <a href=3D"https://gitlab.haskell.org/ghc/ghc/-/wikis/GH= C-status" rel=3D"noreferrer" target=3D"_blank">https://gitlab.haskell.org/g= hc/ghc/-/wikis/GHC-status</a><br> >> [<a href=3D"http://downloads.haskell.org" rel=3D"noreferrer" targe= t=3D"_blank">downloads.haskell.org</a>]: <a href=3D"https://downloads.haske= ll.org/ghc/9.12.4-rc1" rel=3D"noreferrer" target=3D"_blank">https://downloa= ds.haskell.org/ghc/9.12.4-rc1</a><br> >> [ticket]: <a href=3D"https://gitlab.haskell.org/ghc/ghc/-/issues/n= ew" rel=3D"noreferrer" target=3D"_blank">https://gitlab.haskell.org/ghc/ghc= /-/issues/new</a><br> >> _______________________________________________<br> >> ghc-devs mailing list -- <a href=3D"mailto:[email protected]" t= arget=3D"_blank">[email protected]</a><br> >> To unsubscribe send an email to <a href=3D"mailto:ghc-devs-leave@h= askell.org" target=3D"_blank">[email protected]</a><br> >><br> </blockquote></div> --000000000000f7e873064d4f07c0-- --===============9217840408326267374== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Haskell-Cafe mailing list -- [email protected] To (un)subscribe, modify options or view archives go to: Only members subscribed via the mailman list are allowed to post. --===============9217840408326267374==--