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Haddock test suite failure -- can anyone guide me?
by Simon Peyton Jones 31 May '24

31 May '24

Dear Haddock experts I'm getting a failure on !12492 <https://gitlab.haskell.org/ghc/ghc/-/merge_requests/12492> that I can't understand or debug. Can someone guide me? Failure is this: /builds/ghc/ghc/tmp/ghctest-2jo7oz8x/test spaces/testsuite/tests/haddock/haddock_testsuite/haddockHypsrcTest.run haddockHypsrcTest [bad exit code (2)] (normal) A snip of the log is at the end of this message. I want to - understand what it does - repro it locally. Trying the latter, I tried with my HEAD build and did bash$ cd testsuite/tests/haddock/haddock_testsuite bash$ make hypsrcTest but that failed on almost all the tests it does, even though HEAD is presumably OK. I'm stumped. Any ideas? The patch only changes the type checker! Thanks SImion This is the log from !12492 Wrong exit code for haddockHypsrcTest()(expected 0 , actual 2 ) Stdout ( haddockHypsrcTest ): [1 of 7] Compiling Test.Haddock.Process ( /builds/ghc/ghc/testsuite/../utils/haddock/haddock-test/src/Test/Haddock/Process.hs, Test/Haddock/Process.o ) [2 of 7] Compiling Test.Haddock.Utils ( /builds/ghc/ghc/testsuite/../utils/haddock/haddock-test/src/Test/Haddock/Utils.hs, Test/Haddock/Utils.o ) [3 of 7] Compiling Test.Haddock.Config ( /builds/ghc/ghc/testsuite/../utils/haddock/haddock-test/src/Test/Haddock/Config.hs, Test/Haddock/Config.o ) [4 of 7] Compiling Test.Haddock ( /builds/ghc/ghc/testsuite/../utils/haddock/haddock-test/src/Test/Haddock.hs, Test/Haddock.o ) [5 of 7] Compiling Test.Haddock.Xhtml ( /builds/ghc/ghc/testsuite/../utils/haddock/haddock-test/src/Test/Haddock/Xhtml.hs, Test/Haddock/Xhtml.o ) [6 of 7] Compiling Main ( /builds/ghc/ghc/testsuite/../utils/haddock/hypsrc-test/Main.hs, Main.o ) [7 of 7] Linking hypsrc-test Haddock version 2.30.0, (c) Simon Marlow 2006 Ported to use the GHC API by David Waern 2006-2008 9.11.20240530 Generating documentation... Testing output files... Checking "src/TemplateHaskellSplices.html"... PASS Checking "src/Bug1091.html"... PASS Checking "src/Polymorphism.html"... PASS Checking "src/UsingQuasiquotes.html"... PASS Checking "src/Records.html"... PASS Checking "src/Quasiquoter.html"... PASS Checking "src/CPP.html"... PASS Checking "src/Operators.html"... PASS Checking "src/Literals.html"... PASS Checking "src/LinkingIdentifiers.html"... PASS Checking "src/Classes.html"... FAIL Checking "src/PositionPragmas.html"... PASS Checking "src/Types.html"... PASS Checking "src/TemplateHaskellQuasiquotes.html"... PASS Checking "src/Constructors.html"... FAIL Checking "src/Identifiers.html"... FAIL Diffing failed cases... Diff for file "src/Classes.html": 1194c1194,1198 < > > >a -> b -> a > forall a b. a -> b -> a > > > >a -> b -> a > forall a b. a -> b -> a > > > >b -> a -> b > forall a b. a -> b -> a > > > >b -> a -> b > forall a b. a -> b -> a > > > >([Int] -> Int) -> (Norf -> [Int]) -> Norf -> Int > forall b c a. (b -> c) -> (a -> b) -> a -> c > > > >(String -> IO ()) -> (Int -> String) -> Int -> IO () > forall b c a. (b -> c) -> (a -> b) -> a -> c > ><a href="Identifiers.html#foo" < > > >Int -> Int -> Int > ><a href="Identifiers.html#foo" > > > >(String -> IO ()) -> (Int -> String) -> Int -> IO () > forall b c a. (b -> c) -> (a -> b) -> a -> c > ><a href="Identifiers.html#quux" < > > >Int -> Int > ><a href="Identifiers.html#quux" > > > >(String -> IO ()) -> (Int -> String) -> Int -> IO () > forall b c a. (b -> c) -> (a -> b) -> a -> c > ><a href="Identifiers.html#norf" < > > >Int -> Int -> Int -> Int > ><a href="Identifiers.html#norf" > ><span class="hs-identifier hs-var" Stderr run ( haddockHypsrcTest ): gmake: *** [Makefile:68: hypsrcTest] Error 1 *** unexpected failure for haddockHypsrcTest(normal)

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Documentation previews on Gitlab pipelines
by Teofil Camarasu 31 May '24

31 May '24

Hi folks, I just wanted to advertise that it is now possible to see rendered previews of documentation changes (haddocks/user guide/etc) on Gitlab pipelines. To access this you need to: 1. Wait for a pipeline to complete. 2. From the MR page, click on "Expand" under the pipeline widget, then "Documentation Preview" 3. This takes you to the job artefacts. Then open `docs/index.html`. 4. Gitlab will then redirect you to the hosted page. Alternatively instead of (2) you can open the "docs-tarball" job directly and click on "Browse" to go to the artefacts. I've also attached a screen recording to make it a bit clearer. I actually set this up a few weeks ago in !12415 <https://gitlab.haskell.org/ghc/ghc/-/merge_requests/12415>. But I forgot to advertise this more widely at the time. And Gitlab isn't super helpful in directing users to it. So, I realised most folks probably don't know it exists. Cheers, Teo

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GHC release series adoption rates
by Clinton Mead 28 May '24

28 May '24

Hi All The recent GHC blog post: https://www.haskell.org/ghc/blog/20240521-ghc-release-priorities.html states: *"9.6.5 seems to be a relatively stable release so far and we plan to prioritise fixes given the relatively higher adoption of this branch"* I was wondering where this information came from? Is this based on a number of downloads or some other metric? Number of companies that have adopted the version? How many stack/ghcup pulls? Or just a vibe/what people seem to be talking about? If there are hard numbers, are they public? The current project I'm working on is still on GHC 9.2.2, so I was considering an upgrade to GHC 9.4.8, but this blog post has made me lean towards the 9.6 series instead. This is just an upgrade for stability not features and so we don't get too far behind. But it would be good to have this popularity info generally instead of having to wait for a blog post. Cheers, Clinton

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Looking for recent works on STG
by Rodrigo Mesquita 26 May '24

26 May '24

Dear all, Do you know of any recent works on the STG? In particular, I am looking for a result connecting STG's execution and Core’s call-by-need semantics when written in structural operational semantics style. Nonetheless, I’m also interested in possibly more recent formulations of STG (e.g. a mechanized one?) beyond the original paper. Cheers Rodrigo Mesquita

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Question about -G RTS flag
by chessai 23 May '24

23 May '24

The docs for -G state: ``` ... Anything larger than about 4 is probably not a good idea unless your program runs for a *long* time, because the oldest generation will hardly ever get collected. ``` What is a "*long*" time?

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Priorities for upcoming GHC releases
by Zubin Duggal 21 May '24

21 May '24

Hi all, We detail our plans for upcoming GHC releases in a new blog post: https://www.haskell.org/ghc/blog/20240521-ghc-release-priorities.html The summary is that we will prioritise work on the 9.10, 9.6 and master branches over work on the 9.8 branch for the coming few months due to time and resource constraints. This does not mean that we are dropping support for GHC 9.8, but that releases in this series might be made at a slower pace than usual. Cheers, Zubin.

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Haddock now lives full-time in the GHC repository
by Hécate 17 May '24

17 May '24

Hello devs, As of today, Haddock now lives in the GHC repository, and not anymore as a submodule from another Gitlab repository which itself was rebased on top of a Github repository. You are encouraged to migrate our currently opened PRs to the GHC repo. If you have any trouble, please do ping me on Matrix (@acidalia:matrix.org), on GitLab (@kleidukos), or by email directly. Read more here: https://discourse.haskell.org/t/haddock-now-lives-in-the-ghc-repository/9576 My thanks to Ben Gamari who was essential in making this migration happen! Cheers, Hécate -- Hécate ✨ 🐦: @TechnoEmpress IRC: Hecate WWW: https://glitchbra.in RUN: BSD

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account approval
by Davide Pancotto 16 May '24

16 May '24

Hello, I registered on gitlab as davide-pn because I want to report a bug. If you want to know it, you can approve it.

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GHC notes plugin for Haskell language server
by Jan van Brügge 13 May '24

13 May '24

Hi all, a few days ago, version 2.8.0.0 of HLS was released and with that the new notes plugin. With this, you can use "Go to Definition" not only on Haskell types and identifiers, but also on Note references and you editor will jump to the relevant file and the position of the full note. Some of you might remember that I created the initial proof of concept at last year's ZuriHac/GHC contributor's Workshop. TL;DR: Update HLS and you dont need to search for notes any more. Cheers, Jan

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GHC 9.10.1 is now available
by Ben Gamari 10 May '24

10 May '24

The GHC developers are very pleased to announce the release of GHC 9.10.1. Binary distributions, source distributions, and documentation are available at [downloads.haskell.org] and shortly via [GHCup]. GHC 9.10 brings a number of new features and improvements, including: * The introduction of the `GHC2024` language edition, building upon `GHC2021` with the addition of a number of widely-used extensions. * Partial implementation of the [GHC Proposal #281], allowing visible quantification to be used in the types of terms. * [Extension] of LinearTypes to allow linear `let` and `where` bindings * The implementation of the [exception backtrace proposal], allowing the annotation of exceptions with backtraces, as well as other user-defined context * Further improvements in the info table provenance mechanism, reducing code size to allow IPE information to be enabled more widely * Javascript FFI support in the WebAssembly backend * Improvements in the fragmentation characteristics of the low-latency non-moving garbage collector. * ... and many more A full accounting of changes can be found in the [release notes]. As always, GHC's release status, including planned future releases, can be found on the [GHC Wiki]. We would like to thank GitHub, IOG, the Zw3rk stake pool, Well-Typed, Tweag I/O, Serokell, Equinix, SimSpace, the Haskell Foundation, 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://downloads.haskell.org/ghc/9.10.1/docs/users_guide/9.10.1-notes.html [GHC Wiki]: https://gitlab.haskell.org/ghc/ghc/-/wikis/GHC-status [exception backtrace]: https://github.com/ghc-proposals/ghc-proposals/pull/330 [GHC Proposal #281]: https://github.com/ghc-proposals/ghc-proposals/pull/281 [linear let]: https://github.com/ghc-proposals/ghc-proposals/pull/624 [downloads.haskell.org] https://downloads.haskell.org/ghc/9.10.1 [ticket]: https://gitlab.haskell.org/ghc/ghc/-/issues/new [GHCup]: https://www.haskell.org/ghcup/

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