- Nhc-bugs - Haskell.org

nhc98 1.14 FFI issues
by Manuel M T Chakravarty 11 Sep '02

11 Sep '02

As I am about to make a release of c2hs (and also Gtk+HS), I made another attempt at compiling the packages with the latest nhc98 (ie, 1.14), which unfortunately fails. The issues are the following: * nhc98 exports its FFI libraries from a module called `FFI', whereas all other systems (and the standard) use `Foreign' for the language-independent and `CForeign' for the C-dependent libraries. This should be pretty easy to fix. (If you insist on providing the `FFI' module, you could just re-export parts of `FFI' in `Foreign' and `CForeign'.) * The FFI includes a `Bits' modules that differs from nhc98's `Bit' module (different function names). Should also be easy to fix. * There seems to be a problem with re-exporting identifiers, which have been imported qualified. I vaguely remember that Malcolm once told me that nhc98 has a problem with that. I am currently working around this by excluding that module when compiling with nhc98 (as it is a library module that is not really needed for c2hs). * I get a set of strange error messages: ====== Errors after type inference/checking: No default for Parsers.Token at 282:3.(1378,[(173,1432)]) No default for Parsers.Token at 254:32.(1267,[(173,1433)]) No default for Parsers.Token at 223:1.(1061,[(173,1188)]) No default for Parsers.Token at 204:25.(1180,[(173,1187)]) All of the error positions are in the first equation of a functions that have `Token t' as the class context in their signature. The Token class is defined as class (Pos t, Show t, Eq t, Ord t) => Token t and I am not sure what these error messages are supposed to tell me. GHC doesn't have a problem with it and it is legal H98 as far as I can see. Strange is also that there are many functions that have the same class context about which nhc98 doesn't complain. Any ideas what this is about? Cheers, Manuel

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Error compiling nhc98-3.06: ghc is not known
by Jose Romildo Malaquias 14 Aug '02

14 Aug '02

Hello. Just compiling hmake-3.06 in my Red Hat Linux 7.3 box with GHC 5.04, and found the following: ================================ $ ghc --version The Glorious Glasgow Haskell Compilation System, version 5.04 $ ./configure --prefix=/usr --mandir=/usr/share/man/man1 --buildwith=ghc --buildopts=-O [...] $ make 'OPT=-O2 -march=i386 -mcpu=i686' [...] cd src/interpreter; make HC=ghc install make[1]: Entering directory `/home/romildo/rpmbuild/BUILD/hmake-3.06/src/interpreter' mkdir -p /home/romildo/rpmbuild/BUILD/hmake-3.06/targets/ix86-Linux/obj/interpreter /home/romildo/rpmbuild/BUILD/hmake-3.06/script/hmake -ghc HInteractive -d/home/romildo/rpmbuild/BUILD/hmake-3.06/targets/ix86-Linux/obj/interpreter -O \ -i../hmake -package lang -package util -DUSE_READLINE=1 -lreadline -lncurses Fail: hmake: the compiler 'ghc' is not known. Stop - hmake dependency error. make[1]: *** [/home/romildo/rpmbuild/BUILD/hmake-3.06/lib/ix86-Linux/HInteractive] Error 1 make[1]: Leaving directory `/home/romildo/rpmbuild/BUILD/hmake-3.06/src/interpreter' make: *** [targets/ix86-Linux/hi-ghc] Error 2 error: Bad exit status from /home/romildo/rpmbuild/tmp/rpm-tmp.30745 (%build) Any clue? ================================ Romildo -- Prof. José Romildo Malaquias Departamento de Computação - Universidade Federal de Ouro Preto http://www.decom.ufop.br/prof/romildo/ romildo(a)iceb.ufop.br http://uber.com.br/romildo/ romildo(a)uber.com.br

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Re: [nhc-bugs] Error compiling nhc98-3.06: ghc is not known
by Jose Romildo Malaquias 13 Aug '02

13 Aug '02

Forgot to attach the script. Regards, Romildo -- Prof. José Romildo Malaquias Departamento de Computação - Universidade Federal de Ouro Preto http://www.decom.ufop.br/prof/romildo/ romildo(a)iceb.ufop.br http://uber.com.br/romildo/ romildo(a)uber.com.br

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Problems building nhc98 with ghc-5.04
by Oliver Braun 23 Jul '02

23 Jul '02

Hi, when building nhc98 with ghc-5.04 I got the following error: /usr/ports/lang/nhc98/work/nhc98-1.14/script/hmake -ghc +CTS -package lang -CTS -d /usr/ports/lang/nhc98/work/nhc98-1.14/targets/ix86-FreeBSD/obj/greencard GreenCard Fail: Can't find module PrelBase in . Or in standard libraries at /usr/local/lib/ghc-5.04/imports/base /usr/local/lib/ghc-5.04/imports/haskell98 /usr/local/lib/ghc-5.04/imports/network /usr/local/lib/ghc-5.04/imports/haskell-src /usr/local/lib/ghc-5.04/imports/lang /usr/local/lib/ghc-5.04/imports/concurrent /usr/local/lib/ghc-5.04/imports/posix /usr/local/lib/ghc-5.04/imports/util /usr/local/lib/ghc-5.04/imports/data /usr/local/lib/ghc-5.04/imports/text /usr/local/lib/ghc-5.04/imports/net /usr/local/lib/ghc-5.04/imports/hssource Asked for by: Decl.lhs [Check settings of -I or -P flags?] This error comes from the lines: #if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ <= 202 import PrelBase(maybe) -- workaround for GHC 2.02 #endif in src/greencard/Decl.lhs src/greencard/FillIn.lhs and src/greencard/Process.lhs Deleting these lines fixes the problems. Anyway, this seems to be a ghc bug, since ghc is looking for PrelBase even though it is not needed for ghc-5.04. Regards, Olli -- IST & IIS _ INF _ UniBwM ___________ http://ist.unibw-muenchen.de/People/obraun/ Tele-Consulting GmbH _______________ http://www.tele-consulting.com/ ___ obraun@ FreeBSD: The Power To Serve ________ http://www.freebsd.org/ ___________________

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RE: More on integer division
by Simon Marlow 01 Jul '02

01 Jul '02

> After a looking a little more, there seem to be other problems > (including errors in my proposed solution). I don't know where the > code for quotRem is, but it is also buggy. For instance, > > Prelude> 9 `quotRem` (-5) > (-1,4) > > (The correct answer is (-1,-4).) I'm frankly astonished: has noone > used these functions with negative arguments before? GHC's answer looks right to me, since according to the report: (x `quot` y)*y + (x `rem` y) == x so (-1 * -5) + 4 == 9 but if 9 `rem` (-5) should be -4, then (-1 * -5) + -4 = 1 > I'm shocked that non of the three Haskell implementations had a test > suite that caught this problem. Take a look at fptools/testsuite/tests/ghc-regress/numeric/should_run/arith0011.hs. There may be one or two wrong answers lurking in there, but that's a lot of results to check by hand! Cheers, Simon

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More on integer division
by Dylan Thurston 29 Jun '02

29 Jun '02

On Fri, Jun 28, 2002 at 03:54:50PM -0400, Dylan Thurston wrote: > On Fri, Jun 28, 2002 at 10:24:13AM +0100, Malcolm Wallace wrote: > > Yes, -5`div`2 == -(5`div`2) == -2 > > but (-5)`div`2 == -3 > > > > Ghc 5.02.2 has the infix priority wrong, and interprets the former as the latter. > > But more bizarrely, ghc 5.02.2 gets this very wrong: > > > > Prelude> (-1796254192) `div` 357566600 > > 5 > > Thanks for the clear summary. After a looking a little more, there seem to be other problems (including errors in my proposed solution). I don't know where the code for quotRem is, but it is also buggy. For instance, Prelude> 9 `quotRem` (-5) (-1,4) (The correct answer is (-1,-4).) I'm frankly astonished: has noone used these functions with negative arguments before? This happens with both ghci and compiled programs, both -fvia-C and -fasm. Hugs (see below) and nhc make the same error in this case. There seems to be too strong a reliance on C's operators '/' and '%', which give these results (with gcc on x86). This may be a bug in gcc. I'm using gcc 2.95.4; I'm not sure which version compiled the Debian packages I'm using. According to http://home.tiscalinet.ch/t_wolf/tw/c/c9x_changes.html#Semantics, the C9x standard specifies that division should truncate towards 0; I believe that earlier it was undefined. I'm shocked that non of the three Haskell implementations had a test suite that caught this problem. ----- __ __ __ __ ____ ___ _________________________________________ || || || || || || ||__ Hugs 98: Based on the Haskell 98 standard ||___|| ||__|| ||__|| __|| Copyright (c) 1994-2001 ||---|| ___|| World Wide Web: http://haskell.org/hugs || || Report bugs to: hugs-bugs(a)haskell.org || || Version: February 2001 _________________________________________ Haskell 98 mode: Restart with command line option -98 to enable extensions Reading file "/usr/share/hugs98/lib/Prelude.hs": Hugs session for: /usr/share/hugs98/lib/Prelude.hs Type :? for help Prelude> 9 `quotRem` (-5) (-1,4) -----

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Re: [nhc-bugs] Unzipping Problems
by D.J.Steinitz 27 Jun '02

27 Jun '02

Malcolm, Simple incompetence! Many thanks, Dominic.

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Unzipping Problems
by D.J.Steinitz 27 Jun '02

27 Jun '02

I'm getting errors when I try to unzip nhc 1.14. Is there really something wrong or am I just being incompetent? Dominic. djs25@compsci-lt2:~$ tar -xzvf nhc98-1.14-ix86-Linux.tar.gz nhc98-1.14/ nhc98-1.14/Makefile.inc nhc98-1.14/Makefile nhc98-1.14/README nhc98-1.14/INSTALL nhc98-1.14/COPYRIGHT nhc98-1.14/configure nhc98-1.14/lib/ nhc98-1.14/lib/ix86-Linux/ nhc98-1.14/lib/ix86-Linux/config nhc98-1.14/lib/ix86-Linux/hmake-PRAGMA tar: Skipping to next header tar: Archive contains obsolescent base-64 headers gzip: stdin: invalid compressed data--format violated tar: Child returned status 1 tar: Error exit delayed from previous errors djs25@compsci-lt2:~$ djs25@compsci-lt2:~$ tar -xzvf nhc98src-1.14.tar.gz nhc98-1.14/ nhc98-1.14/Makefile.inc nhc98-1.14/Makefile nhc98-1.14/README nhc98-1.14/INSTALL nhc98-1.14/COPYRIGHT nhc98-1.14/configure nhc98-1.14/src/ nhc98-1.14/src/compiler98/ nhc98-1.14/src/compiler98/Makefile nhc98-1.14/src/compiler98/Makefile.hat nhc98-1.14/src/compiler98/Makefile.inc nhc98-1.14/src/compiler98/AssocTree.hs nhc98-1.14/src/compiler98/AuxFile.hs nhc98-1.14/src/compiler98/AuxFixity.hs nhc98-1.14/src/compiler98/AuxLabelAST.hs tar: Skipping to next header tar: Archive contains obsolescent base-64 headers gzip: stdin: invalid compressed data--format violated tar: Child returned status 1 tar: Error exit delayed from previous errors djs25@compsci-lt2:~$

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Mystery error while compiling for tracing
by Anthony Travers 11 Jun '02

11 Jun '02

Has anyone ever seen a error message like the following while compiling with tracing activated? Fail: Can't find int for (Prelude.49,Constructor) The target module and its imports don't define a type or data constructor called Constructor - any ideas? (They all compile without any problems with tracing turned off.) I'm using nhc98 1.10-1 from the RH 7.2 package. Thanks in advance, Anthony Travers (amt-public(a)dodo.com.au)

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hmake buglet
by Simon Marlow 29 May '02

29 May '02

hmake gets confused when processing HsLexer.lhs, complaining about: Fail: In file HsLexer.lhs found close comment -} but no matching open {- Stop - hmake dependency error. Get HsLexer.hs from here: http://cvs.haskell.org/cgi-bin/cvsweb.cgi/~checkout~/fptools/haddock/src /HsLexer.lhs?rev=1.11&content-type=text/plain Cheers, Simon

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