- Glasgow-haskell-users

Summit on Advances in Programming Languages 2019
by Simon Peyton Jones 26 Nov '18

26 Nov '18

Haskellers The Summit oN Advances in Programming Languages<http://snapl.org/2017/index.html> (SNAPL) is a biennial venue for discussions about programming languages. SNAPL focuses on experience-based insight, innovation, and visionary ideas spanning from foundations to applications of programming languages. SNAPL welcome perspectives from both industry and academia. Ras Bodik and Shriram Krishnamurthi are looking for community input in where and when to hold SNAPL 2019, and how long it should be. Here is their survey<https://goo.gl/forms/pNydkzP4RwLuIa4p1>. Do consider making your views known to them. Simon

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[ANNOUNCE] GHC 8.6.2 is now available
by Ben Gamari 05 Nov '18

05 Nov '18

Hello everyone, The GHC team is very happy to announce the availability of GHC 8.6.2, a bugfix release to GHC 8.6.1. The source distribution, binary distributions, and documentation for this release are available at https://downloads.haskell.org/~ghc/8.6.2 The 8.6 release fixes several regressions present in 8.6.1 including: * A long-standing (but previously hard to manifest) bug resulting in undefined behavior for some applications of dataToTag# has been fixed (#15696) * An incorrect linker path to libgmp in the Mac OS binary distributions (#15404) * A regression rendering Windows installations to read-only directories unusable (#15667) * A regression resulting in panics while compiling some record updates of GADTs constructors (#15499) * A regression resulting in incorrect type errors when splicing types into constraint contexts has been fixed (#15815) * Around a dozen other issues. See Trac [1] for a full list of issues resolved in this release. Note that this release ships with one significant but long-standing bug (#14251): Calls to functions taking both Float# and Double# may result in incorrect code generation when compiled using the LLVM code generator. This is not a new issue, it has existed as long as the LLVM code generator has existed; however, changes in code generation in 8.6 made it more likely that user code using only lifted types will trigger it. Happy compiling! Cheers, - Ben [1] https://ghc.haskell.org/trac/ghc/query?status=closed&milestone=8.6.2&col=id…

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Re: [ANNOUNCE] GHC 8.4.4 released
by Carter Schonwald 26 Oct '18

26 Oct '18

Hey David, i'm looking at the git history andit doesn't seem to have any commits between 8.4.3 and 8.4.4 related to the dataToTag issue does any haskell code in the while trigger the bug on 8.4 series? On Sun, Oct 21, 2018 at 11:06 AM David Feuer <david(a)well-typed.com> wrote: > Did this release fix the dataToTag# issue? I think that has a number of > people concerned. > On Oct 18, 2018, at 11:46 AM, Ben Gamari <ben(a)well-typed.com> wrote: >> >> Jens Petersen <juhpetersen(a)gmail.com> writes: >> >> On Mon, 15 Oct 2018 at 07:17, Ben Gamari <ben(a)well-typed.com> wrote: >>> >>>> The GHC team is pleased to announce the availability of GHC 8.4.4 >>>> >>> >>> Thank you >>> >>> As always, the full release notes can be found in the users guide, >>>> >>> >>> https://downloads.haskell.org/~ghc/8.4.4/docs/html/users_guide/8.4.4-notes.… >>> >>> I think this base text is out of date, and could be dropped, right? >> >> >> Indeed it is. >> >> I see that stm was also bumped: though it is not listed in >>> https://downloads.haskell.org/~ghc/8.4.4/docs/html/users_guide/8.4.4-notes.… >> >> >> Also true. However, in my mind this isn't nearly as significant as the >> `text` bump, which affects many users and fixes extremely bad >> misbehavior. >> >> Thanks for noticing these! >> >> Cheers >> >> - Ben >> >> ------------------------------ >> >> ghc-devs mailing list >> ghc-devs(a)haskell.org >> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs >> >> _______________________________________________ > ghc-devs mailing list > ghc-devs(a)haskell.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs >

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Happy / Alex description for Haskell2010
by Sam Halliday 25 Oct '18

25 Oct '18

Hello all, Is there a Happy / Alex file describing Haskell2010? I can see the versions in the ghc source tree, but of course they support all the ghc extensions. The link to the hsparser page [1] in the Happy documentation doesn't seem to exist anymore. I would also love to hear if there is a Bison definition. Best regards, Sam [1] http://www.pms.informatik.uni-muenchen.de/mitarbeiter/panne/haskell_libs/hs…

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[ANNOUNCE] GHC 8.6.1 released
by Ben Gamari 21 Oct '18

21 Oct '18

Hello everyone, The GHC team is pleased to announce the availability of GHC 8.6.1, the fourth major release in the GHC 8 series. The source distribution, binary distributions, and documentation for this release are available at https://downloads.haskell.org/~ghc/8.6.1 The 8.6 release fixes over 400 bugs from the 8.4 series and introduces a number of exciting features. These most notably include: * A new deriving mechanism, `deriving via`, providing a convenient way for users to extend Haskell's typeclass deriving mechanism * Quantified constraints, allowing forall quantification in constraint contexts * An early version of the GHCi `:doc` command * The `ghc-heap-view` package, allowing introspection into the structure of GHC's heap * Valid hole fit hints, helping the user to find terms to fill typed holes in their programs * The BlockArguments extension, allowing the `$` operator to be omitted in some unambiguous contexts * An exciting new plugin mechanism, source plugins, allowing plugins to inspect and modify a wide variety of compiler representations. * Improved recompilation checking when plugins are used * Significantly better handling of macOS linker command size limits, avoiding linker errors while linking large projects * The next phase of the MonadFail proposal, enabling -XMonadFailDesugaring by default A full list of the changes in this release can be found in the release notes: https://downloads.haskell.org/~ghc/8.6.1/docs/html/users_guide/8.6.1-notes.… Perhaps of equal importance, GHC 8.6 is the second major release made under GHC's accelerated six-month release schedule and the first set of binary distributions built primarily using our new continuous integration scheme. While the final 8.6 release is around three weeks later than initially scheduled due to late-breaking bug reports, we expect that the 8.8 release schedule shouldn't be affected. Thanks to everyone who has contributed to developing, documenting, and testing this release! As always, let us know if you encounter trouble. How to get it ~~~~~~~~~~~~~ The easy way is to go to the web page, which should be self-explanatory: https://www.haskell.org/ghc/ We supply binary builds in the native package format for many platforms, and the source distribution is available from the same place. Packages will appear as they are built - if the package for your system isn't available yet, please try again later. Background ~~~~~~~~~~ Haskell is a standard lazy functional programming language. GHC is a state-of-the-art programming suite for Haskell. Included is an optimising compiler generating efficient code for a variety of platforms, together with an interactive system for convenient, quick development. The distribution includes space and time profiling facilities, a large collection of libraries, and support for various language extensions, including concurrency, exceptions, and foreign language interfaces. GHC is distributed under a BSD-style open source license. A wide variety of Haskell related resources (tutorials, libraries, specifications, documentation, compilers, interpreters, references, contact information, links to research groups) are available from the Haskell home page (see below). On-line GHC-related resources ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Relevant URLs on the World-Wide Web: GHC home page https://www.haskell.org/ghc/ GHC developers' home page https://ghc.haskell.org/trac/ghc/ Haskell home page https://www.haskell.org/ Supported Platforms ~~~~~~~~~~~~~~~~~~~ The list of platforms we support, and the people responsible for them, is here: https://ghc.haskell.org/trac/ghc/wiki/Contributors Ports to other platforms are possible with varying degrees of difficulty. The Building Guide describes how to go about porting to a new platform: https://ghc.haskell.org/trac/ghc/wiki/Building Developers ~~~~~~~~~~ We welcome new contributors. Instructions on accessing our source code repository, and getting started with hacking on GHC, are available from the GHC's developer's site run by Trac: https://ghc.haskell.org/trac/ghc/ Mailing lists ~~~~~~~~~~~~~ We run mailing lists for GHC users and bug reports; to subscribe, use the web interfaces at https://mail.haskell.org/cgi-bin/mailman/listinfo/glasgow-haskell-users https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-tickets There are several other haskell and ghc-related mailing lists on www.haskell.org; for the full list, see https://mail.haskell.org/cgi-bin/mailman/listinfo Some GHC developers hang out on #haskell on IRC, too: https://www.haskell.org/haskellwiki/IRC_channel Please report bugs using our bug tracking system. Instructions on reporting bugs can be found here: https://www.haskell.org/ghc/reportabug

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Help inform GHC's development priorities
by Ben Gamari 18 Oct '18

18 Oct '18

tl;dr. Please a take a minute to express your thoughts on GHC's development priorities via this survey [1]. Hello everyone, The GHC developers want to ensure that we are working on problems that of most importance to you, the Haskell community. To this end we are surveying the community [1], asking how our users interact with GHC and which problems need to be addressed most urgently. We hope you will take a few minutes to give us your thoughts [1]. Thanks in advance for your time and, finally, thanks to the financial supporters that make our work GHC possible. Cheers, - Ben and the rest of the GHC developers [1] https://docs.google.com/forms/d/e/1FAIpQLSdh7sf2MqHoEmjt38r1cxCF-tV76OFCJqU…

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[ANNOUNCE] GHC 8.4.4 released
by Ben Gamari 18 Oct '18

18 Oct '18

Hello everyone, The GHC team is pleased to announce the availability of GHC 8.4.4, a patch-level release in the 8.4 series. The source distribution, binary distributions, and documentation for this release are available at https://downloads.haskell.org/~ghc/8.4.4 This release fixes several bugs present in 8.4.3 These include, - A bug which could result in memory unsafety with certain uses of `touch#` has been resolved. (#14346) - A compiler panic triggered by some GADT record updates has been fixed (#15499) - The `text` library has been updated, fixing several serious bugs in the version shipped with GHC 8.4.3 (see `text` issues #227, #221, and #197. - A serious code generation bug in the LLVM code generation, potentially resulting in incorrect evaluation of floating point expressions, has been fixed (#14251) As always, the full release notes can be found in the users guide, https://downloads.haskell.org/~ghc/8.4.4/docs/html/users_guide/8.4.4-notes.… Thanks to everyone who has contributed to developing, documenting, and testing this release! As always, let us know if you encounter trouble. How to get it ~~~~~~~~~~~~~ The easy way is to go to the web page, which should be self-explanatory: https://www.haskell.org/ghc/ We supply binary builds in the native package format for many platforms, and the source distribution is available from the same place. Packages will appear as they are built - if the package for your system isn't available yet, please try again later. Background ~~~~~~~~~~ Haskell is a standard lazy functional programming language. GHC is a state-of-the-art programming suite for Haskell. Included is an optimising compiler generating efficient code for a variety of platforms, together with an interactive system for convenient, quick development. The distribution includes space and time profiling facilities, a large collection of libraries, and support for various language extensions, including concurrency, exceptions, and foreign language interfaces. GHC is distributed under a BSD-style open source license. A wide variety of Haskell related resources (tutorials, libraries, specifications, documentation, compilers, interpreters, references, contact information, links to research groups) are available from the Haskell home page (see below). On-line GHC-related resources ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Relevant URLs on the World-Wide Web: GHC home page https://www.haskell.org/ghc/ GHC developers' home page https://ghc.haskell.org/trac/ghc/ Haskell home page https://www.haskell.org/ Supported Platforms ~~~~~~~~~~~~~~~~~~~ The list of platforms we support, and the people responsible for them, is here: https://ghc.haskell.org/trac/ghc/wiki/Contributors Ports to other platforms are possible with varying degrees of difficulty. The Building Guide describes how to go about porting to a new platform: https://ghc.haskell.org/trac/ghc/wiki/Building Developers ~~~~~~~~~~ We welcome new contributors. Instructions on accessing our source code repository, and getting started with hacking on GHC, are available from the GHC's developer's site run by Trac: https://ghc.haskell.org/trac/ghc/ Mailing lists ~~~~~~~~~~~~~ We run mailing lists for GHC users and bug reports; to subscribe, use the web interfaces at https://mail.haskell.org/cgi-bin/mailman/listinfo/glasgow-haskell-users https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-tickets There are several other haskell and ghc-related mailing lists on www.haskell.org; for the full list, see https://mail.haskell.org/cgi-bin/mailman/listinfo Some GHC developers hang out on #haskell on IRC, too: https://www.haskell.org/haskellwiki/IRC_channel Please report bugs using our bug tracking system. Instructions on reporting bugs can be found here:

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Call for lightning talks and participation -- Haskell Implementors' Workshop
by Joachim Breitner 16 Sep '18

16 Sep '18

Call for Contributions ACM SIGPLAN Haskell Implementors’ Workshop Sunday, 23 September, 2018 https://icfp18.sigplan.org/track/hiw-2018-papers Co-located with ICFP 2018 St. Louis, Missouri, US https://conf.researchr.org/home/icfp-2018 The Haskell Implementors Workshop is only one week away! Time to look at our great program at https://icfp18.sigplan.org/track/hiw-2018-papers#program and plan your day! Lightning Talks --------------- Like in the previous years, we will have slots for lightning talks. And because they were so successful last year, we will have more! *Topics* Anything related to Haskell implementations, fun uses of Haskell etc. goes. Feel free to tell us about ongoing work, to entertain, to rant, to stir a debate! (If you ever have been to a security or crypto conference, you might have attended their “rump session”. While there will not be alcohol involved at HIW, I hope that we can still match their creativity and insightful fun.) *Rules* * There are 3 sets of 3 lightning talks. * Sign-up is on day of the event, in person, on paper. No prior registration possible. * Lightning talks are 8 mins or less. If you know that your lightning talk takes less time, please say so, and maybe we can put four lightning talks into the slot. * Lightning talks do not count as peer-reviewed publications and are not published in the conference proceedings. Program Committee ----------------- * Edwin Brady (University of St. Andrews, UK) * Joachim Breitner – chair (DFINITY / University of Pennsylvania) * Ben Gamari (Well-Typed LLP) * Michael Hanus (Kiel University) * Roman Leshchinsky (Facebook) * Niki Vazou (University of Maryland) Contact ------- * Joachim Breitner <joachim(a)cis.upenn.edu> -- Joachim Breitner former post-doctoral researcher http://cis.upenn.edu/~joachim

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[ANNOUNCE] GHC 8.6.1-beta1 available
by Ben Gamari 11 Sep '18

11 Sep '18

Hello everyone, The GHC development team is very pleased to announce the first beta leading up to GHC 8.6.1 release. The usual release artifacts are available from https://downloads.haskell.org/~ghc/8.6.1-beta1 This beta fixes most of the bugs reported in the first two alphas and brings all of the core libraries up to their final release versions. The 8.6 release fixes over 300 bugs from the 8.4 series and introduces a number of exciting features. These most notably include: * Significantly better handling of macOS linker command size limits, avoiding linker errors while linking large projects * A new deriving mechanism, `deriving via`, providing a convenient way for users to extend Haskell's typeclass deriving mechanism * Quantified constraints, allowing forall quantification in contexts * An early version of the GHCi `:doc` command * The `ghc-heap-view` package, allowing introspection into the structure of GHC's heap * Valid hole fit hints, helping the user to find terms to fill typed holes in their programs * The BlockArguments extension, allowing the `$` operator to be omitted in some unambiguous contexts * The next phase of the MonadFail proposal, enabling -XMonadFailDesugaring by default A full list of the changes in this release can be found in the release notes: https://downloads.haskell.org/~ghc/8.6.1-beta1/docs/html/users_guide/8.6.1-… This will very likely be the last release before the final 8.6.1 so do give it a thorough testing and, as always, report any issues you encounter. Thanks for your help! Cheers, - Ben

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Fwd: Unable to compile ghc-8.2.2 with ghc-8.4.3
by Sven Panne 31 Aug '18

31 Aug '18

Am Fr., 31. Aug. 2018 um 11:11 Uhr schrieb Sam Halliday < sam.halliday(a)gmail.com>: > [...] It would make a lot of sense for the > "unregistered" sources to be made available as an optional download > alongside the source code, if haskell.org were open to that > possibility. IIRC, the generated C code is *not* platform-independent, at least that is what I remember from ancient times. Perhaps I'm wrong and/or this has changed, but if this is really the case, you would need an additional download per target platform. Cheers, S.

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