- Glasgow-haskell-users

GHCi's search path
by Peter Gammie 13 May '09

13 May '09

Hello, According to the manual: http://haskell.cs.yale.edu/ghc/docs/latest/html/users_guide/separate-compil… GHCi is not overly keen to go looking for modules in directories different to where the source resides. The semantics I want is: - use the Cabal-built objects/hi files in dist/build if they're fresh enough - interpret the source otherwise. Is that possible? cheers peter

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[johan.tibell@gmail.com: [Haskell-cafe] Heads up: Conflicting versions of network-2.2.1]
by Don Stewart 11 May '09

11 May '09

----- Forwarded message from Johan Tibell <johan.tibell(a)gmail.com> ----- Date: Sun, 10 May 2009 19:23:20 +0200 From: Johan Tibell <johan.tibell(a)gmail.com> To: haskell-cafe <haskell-cafe(a)haskell.org> Subject: [Haskell-cafe] Heads up: Conflicting versions of network-2.2.1 Hi, The version of network-2.2.1 that shipped with GHC 6.10 differs from the one on Hackage [1]. The version that was released with GHC was never uploaded to Hackage and was never tagged in the darcs repository. When making a new release of network I forgot to check the version number on the version of network that shipped with GHC. My appologies. If you want the API additions that are present in network-2.2.1 on Hackage use network-2.2.1.1 instead to make sure that e.g. cabal-install doesn't use the version of network that comes with GHC. In the future there won't be any releases directly from the darcs repo. All releases will be made on Hackage to later be picked up by the Haskell Platform. Cheers, Johan 1. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/network-2.2.1 _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe(a)haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ----- End forwarded message -----

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Functions for builtin operators (?)
by Colin Paul Adams 10 May '09

10 May '09

Where is a function with a name like the following defined in the ghc source code? .Classes.>_ ( tpl_B6 ) I've tried searching for such names - all I can find is a comment referring to tpl_B2. -- Colin Adams Preston Lancashire

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runhaskell a parallel program
by Neil Mitchell 08 May '09

08 May '09

Hi, I've got a program which I'd like to run on multiple threads. If I compile it with ghc --make -threaded, then run with +RTS -N2 it runs on 2 cores very nicely. If however I run it with runhaskell Test.hs +RTS -N2 I get told the -N2 flag isn't supported. Is there a way to runhaskell a program on multiple cores? Is this a bug that it doesn't work, a feature request I'm making, or is there some trick to getting it working I haven't thought of? I'll raise a bug report if that turns out to be the right thing. Thanks Neil

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ghc 6.10.3-prerelease failed build log for freebsd7.2
by brad clawsie 07 May '09

07 May '09

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 hi after some trying, i was unable to get the 6.10.3 prerelease to build on freebsd 7.2. i was trying to use an existing 6.10.2 as my build ghc. i saved the output of the entire build from ./configure to the point of failure. it is too long too attach here, you can see it at: http://www.b7j0c.org/ghc-6.10.3.log.txt it is about 4.4mb thanks brad -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAkn+hUUACgkQxRg3RkRK91OSCwCfZ2LuR2v1UNYfx1z1gCx/5Kam 4pwAn0+T69nj0qIl4LyCYEsy/mAOdc8h =6alu -----END PGP SIGNATURE-----

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6.10.3 prerelease
by Ian Lynagh 06 May '09

06 May '09

Hi all, 6.10.3 is now ready to release. There have been very few changes relative to 6.10.2; the release notes are here: http://www.haskell.org/ghc/dist/stable/docs/users_guide/release-6-10-3.html This is just to give people a chance to report any regressions relative to 6.10.2, in particular, build failures or ghci problems. Source tarballs are here: http://www.haskell.org/ghc/dist/stable/dist/ghc-6.10.2.20090430-src.tar.bz2 http://www.haskell.org/ghc/dist/stable/dist/ghc-6.10.2.20090430-src-extrali… Unless any major problems are uncovered, we expect to build the final release in a couple of days. Thanks Ian

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GHC 6.10.2 the 'impossible' panic with type families
by Jan Jakubuv 06 May '09

06 May '09

Dear haskellers, with the following code: {-# OPTIONS -fglasgow-exts #-} class SUBST s where type STerm s class OBJECT o where type OTerm o apply :: (SUBST s, OTerm o ~ STerm s) => s -> o fce' f = fce . apply $ f fce f = fce' f I have the following message in both GHCi and GHC (tested on GHC 6.10.1 linux and win, and 6.10.2 linux): ghc: panic! (the 'impossible' happened) (GHC version 6.10.2 for i386-unknown-linux): idInfo co{v agz} [tv] Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug The above is the smallest example I have found that behaves in this way. It is a striped version of an original and more complicated code. What seems interesting to me is that when one defines `fce` as follows (instead of the above): fce = fce' then everything is ok (= no panic message). In my original code `fce'` was a monad computation, something like: fce' f = fce f >>= \s → fce (apply s) and this produces the same result (= the panic message). Is this a bug or a known issue? Sincerely, Jan. -- Heriot-Watt University is a Scottish charity registered under charity number SC000278.

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ghc-6.10.3-pre on OS X 10.5.6
by Gregory Wright 06 May '09

06 May '09

Hi, I built ghc-6.10.2.20090504 on OS X 10.5.6 (Intel). The build succeeded, and the results of running the 6.10.2 (release) testsuite were: OVERALL SUMMARY for test run started at Wed May 6 04:21:54 EDT 2009 2413 total tests, which gave rise to 12919 test cases, of which 0 caused framework failures 2489 were skipped 10033 expected passes 301 expected failures 0 unexpected passes 96 unexpected failures Unexpected failures: 2469(ghci) 2816(ghci) DoParamM(normal) jl_defaults(ghci) jules_xref(ghci) jules_xref2(ghci) launchbury(ghci) lex(ghci) mod133(normal) num009 (normal ,optc,hpc,optasm,profc,profasm,ghci,threaded1,threaded2,profthreaded) reify (normal ,optc,hpc,optasm,profc,profasm,ghci,threaded1,threaded2,profthreaded) rittri(ghci) signals002(ghci,ghci) signals004 (ghci ,threaded1,threaded2,profthreaded,ghci,threaded1,threaded2,profthreaded) tc183(normal,optc,hpc,optasm,profc,profasm) tc217(normal,optc,hpc,optasm,profc,profasm) tc220(normal,optc,hpc,optasm,profc,profasm) tc223(normal,optc,hpc,optasm,profc,profasm) tc232(normal,optc,hpc,optasm,profc,profasm) tcfail126(normal) tree (normal ,optc,hpc,optasm,profc,profasm,ghci,threaded1,threaded2,profthreaded) (I assume that I should be testing with the latest released testsuite in the absence of a snapshot. Is that true?) Best Wishes, Greg

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6.10.3-pre
by Serge D. Mechveliani 06 May '09

06 May '09

Dear GHC team, I have tested ghc-6.10.2.20090430 under Debian Linux, processor = (GenuineIntel cpu family 6, Intel(R) Core(TM)2 CPU 6400). It looks all right. The test was: 1) making ghc-6.10.2.20090430 from source by ghc-6.10.2, 2) making DoCon and running its test, 3) making Dumatel-1.06-pre and running its test, also with -enable-library-profiling and a bit of time profiling (for any future occasion: profiling is important). Regards, ----------------- Serge Mechveliani mechvel(a)botik.ru

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Last CFP: Trends in Functional Programming
by Simon Marlow 06 May '09

06 May '09

[ Forwarding on behalf of Horváth Zoltán <hz(a)inf.elte.hu> ] Last call for papers 10th SYMPOSIUM ON TRENDS IN FUNCTIONAL PROGRAMMING TFP 2009 SELYE JANOS UNIVERSITY, KOMARNO, SLOVAKIA June 2-4, 2009 http://www.inf.elte.hu/tfp_cefp_2009 *** Submission deadline extended until 10th of May! *** The symposium on Trends in Functional Programming (TFP) is an international forum for researchers with interests in all aspects of functional programming languages, focusing on providing a broad view of current and future trends in Functional Programming. It aspires to be a lively environment for presenting the latest research results. Acceptance for the conference is based on full papers or extended abstracts, and a formal post-symposium refereeing process selects the best articles presented at the symposium for publication in a high-profile volume. TFP 2009 is hosted by the Selye Janos University, Komarno, Slovakia, and it is co-located with the 3rd Central-European Functional Programming School (CEFP 2009), which is held immediately before TFP 2009 (May 25-30). IMPORTANT DATES (ALL 2009) * Paper Submission: May 10 (extended) * Notification of Acceptance: May 12 * Camera Ready Symposium Proceedings Paper: May 14 * TFP Symposium: June 2-4, 2009 * Post Symposium Paper Submission: June 30 * Notification of Acceptance: September 7 * Camera Ready Revised Paper: September 21 SCOPE OF THE SYMPOSIUM As part of the Symposium's focus on trends we therefore identify the following five article categories. High-quality articles are solicited in any of these categories: * Research: leading-edge, previously unpublished research. * Position: on what new trends should or should not be. * Project: descriptions of recently started new projects. * Evaluation: what lessons can be drawn from a finished project. * Overview: summarizing work with respect to a trendy subject. Articles must be original and not submitted for simultaneous publication to any other forum. They may consider any aspect of functional programming: theoretical, implementation-oriented, or more experience- oriented. Applications of functional programming techniques to other languages are also within the scope of the symposium. Contributions on the following subject areas are particularly welcomed: * Dependently Typed Functional Programming * Validation and Verification of Functional Programs * Debugging for Functional Languages * Functional Programming and Security * Functional Programming and Mobility * Functional Programming to Animate/Prototype/Implement Systems from Formal or Semi-Formal Specifications * Functional Languages for Telecommunications Applications * Functional Languages for Embedded Systems * Functional Programming Applied to Global Computing * Functional GRIDs * Functional Programming Ideas in Imperative or Object-Oriented Settings (and the converse) * Interoperability with Imperative Programming Languages * Novel Memory Management Techniques * Parallel/Concurrent Functional Languages * Program Transformation Techniques * Empirical Performance Studies * Abstract/Virtual Machines and Compilers for Functional Languages * New Implementation Strategies * Any new emerging trend in the functional programming area If you are in doubt on whether your article is within the scope of TFP, please contact the TFP 2009 program chairs, Zoltan Horvath and Viktoria Zsok at tfp2009(a)inf.elte.hu <mailto:tfp2009@inf.elte.hu> SUBMISSION AND DRAFT PROCEEDINGS Acceptance of articles for presentation at the symposium is based on the screening process of full papers (15 pages) and extended abstracts (at least 3 pages). TFP encourages PhD students to submit papers. PhD students may request the program committee to provide extensive feedback on their full papers at the time of submission. Full papers describing work accepted for presentation must be completed before the symposium for publication in the draft proceedings. Further details can be found at the TFP 2009 website. POST-SYMPOSIUM REFEREEING AND PUBLICATION In addition to the draft symposium proceedings, we continue the TFP tradition of publishing a high-quality subset of contributions in the Intellect series on Trends in Functional Programming. PROGRAM COMMITTEE * Peter Achten (symp-chair), Radboud University Nijmegen, NL * John Clements, California Polytechnic State University, USA * Cormac Flanagan, University of California at Santa Cruz, USA * Jurriaan Hage, Utrecht University, NL * Kevin Hammond, University of St. Andrews, UK * Michael Hanus, Christian-Albrechts University zu Kiel, DE * Ralf Hinze, University of Oxford, UK * Zoltan Horvath (PC co-chair), Eotvos Lorand University, HU * Graham Hutton, University of Nottingham, UK * Johan Jeuring, Utrecht University, NL * Pieter Koopman (symp-chair), Radboud University Nijmegen, NL * Hans-Wolfgang Loidl, Ludwig-Maximilians University Munchen, DE * Rita Loogen, Philipps-University Marburg, DE * Greg Michaelson, Heriot-Watt University, UK * Marco T. Morazan, Seton Hall University, USA * Rex L Page, University of Oklahoma, USA * Sven-Bodo Scholz, University of Hertfordshire, UK * Clara Segura, University Complutense de Madrid, ES * Mary Sheeran, Chalmers University of Technology, SE * Phil Trinder, Heriot-Watt University, UK * Marko van Eekelen, Radboud University Nijmegen, NL * Varmo Vene, University of Tartu, EE * Viktoria Zsok (PC co-chair), Eotvos Lorand University, HU LOCATION The Conference Centre of Selye University, Komarno, Slovakia (http://www.selyeuni.sk/) is a new and excellent conference centre with modern equipment, lecture rooms and computer labs. Komarno is on the north bank of river Danube, the northern part of the city Komarom / Komarno. It is a charming old city with about 30 000 inhabitants, 90 km away from Budapest (the capital of Hungary), with good highway and railway connections and 90 km away from Bratislava (the capital of Slovakia), about 100 km from Vienna International Airport.

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