Your message dated Sat, 06 Nov 2021 00:20:42 +0000 with message-id <e1mj9rq-00013y...@fasolo.debian.org> and subject line Bug#994241: fixed in ruby-lapack 1.8.2-1 has caused the Debian Bug report #994241, regarding ruby-lapack autopkgtest needs to be adapted for LAPACK 3.10 to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact ow...@bugs.debian.org immediately.) -- 994241: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=994241 Debian Bug Tracking System Contact ow...@bugs.debian.org with problems
--- Begin Message ---Package: ruby-lapack Version: 1.8.1-1 Severity: serious Tags: sid bookworm X-Debbugs-CC: debian...@lists.debian.org User: debian...@lists.debian.org Usertags: needs-update Dear Maintainer, Since the upload of lapack 3.10.0-1, the autopkgtest of ruby-lapack fails in unstable. See for example: https://ci.debian.net/data/autopkgtest/unstable/amd64/r/ruby-lapack/15155031/log.gz More precisely, the tests about generalized singular value decomposition (GSVD) fail. Mathematically, the GSVD does not have a unique solution. For some reason, lapack 3.10 now returns a different (still valid) solution, but the ruby-lapack testsuite hardcodes another, specific, solution. Please find attached a Fortran 2008 source code through which I verified that the decomposition given by both lapack 3.9 and 3.10 is valid, though the Q matrix is different between the two versions. The code needs to be compiled with gfortran, and linked against -llapack. I verified only the double float decomposition (dggsvd), but the single float decomposition test (sggsvd) most likely fails for the same reason. The testsuite of ruby-lapack thus needs to be adapted, by allowing alternative solutions (either accept both the old and the new solutions, or completely rethink the test by only verifying the the decomposition is valid as I did in my program). N.B. : when trying to reproduce the problem, please ensure that your lapack alternative (as given by “update-alternatives --display liblapack.so.3-x86_64-linux-gnu) points to /usr/lib/x86_64-linux- gnu/lapack/liblapack.so.3, and not to the binary provided by either openblas or atlas (because these two have not yet been recompiled against lapack 3.10, and thus do not expose the problem). Best regards, -- ⢀⣴⠾⠻⢶⣦⠀ Sébastien Villemot ⣾⠁⢠⠒⠀⣿⡁ Debian Developer ⢿⡄⠘⠷⠚⠋⠀ https://sebastien.villemot.name ⠈⠳⣄⠀⠀⠀⠀ https://www.debian.orgprogram ggsvd use iso_fortran_env implicit none interface subroutine dggsvd(jobu, jobv, jobq, m, n, p, k, l, a, lda, b, & ldb, alpha, beta, u, ldu, v, ldv, q, ldq, work, & iwork, info) import :: real64 real(real64), dimension(*), intent(inout) :: a, b real(real64), dimension(*), intent(out) :: alpha, beta, q, u, v, work character, intent(in) :: jobq, jobu, jobv integer, intent(in) :: lda, ldb, ldq, ldu, ldv, m, n, p integer, intent(out) :: info, k, l integer, dimension(*), intent(out) :: iwork end subroutine dggsvd end interface real(real64) :: a(4,3), b(2,3), alpha(3), beta(3), u(4,4), v(2,2), q(3,3), work(12), d1(4,3), d2(2,3), a_bak(4,3), b_bak(2,3) integer :: info, k, l, iwork(3) a = reshape(source = [ real(real64) :: 1., 3., 4., 7., 2., 2., 5., 8., 3., 1., 6., 8. ], shape = [4,3]) b = reshape(source = [ real(real64) :: -2., 4., -3., 6., 3., 5. ], shape = [ 2, 3 ]) print '("A=",/,4(3es12.4,:,/))', transpose(a) print '("B=",/,2(3es12.4,:,/))', transpose(b) a_bak = a b_bak = b call dggsvd("U", "V", "Q", 4, 3, 2, k, l, a, 4, b, 2, alpha, beta, u, 4, v, 2, q, 3, work, iwork, info) print '("U=",/,4(4es12.4,:,/))', transpose(u) print '("V=",/,2(2es12.4,:,/))', transpose(v) print '("Q=",/,3(3es12.4,:,/))', transpose(q) print '("k=",i1)', k print '("l=",i1)', l if (k /= 1) stop "k is incorrect" if (l /= 2) stop "l is incorrect" ! We are in the case where M-K-L>0 ! Also note that N-K-L=0 d1 = 0._real64 d1(1,1) = 1._real64 d1(2,2) = alpha(2) d1(3,3) = alpha(3) d2 = 0._real64 d2(1,2) = beta(2) d2(2,3) = beta(3) associate (r => a(1:3,1:3)) associate (a2 => matmul(u, matmul(d1, matmul(r, transpose(q)))), & b2 => matmul(v, matmul(d2, matmul(r, transpose(q))))) print '("Error on reconstructed A: ", es12.4)', maxval(abs(a_bak-a2)) print '("Error on reconstructed B: ", es12.4)', maxval(abs(b_bak-b2)) end associate end associate end program ggsvd
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--- Begin Message ---Source: ruby-lapack Source-Version: 1.8.2-1 Done: Youhei SASAKI <uwab...@gfd-dennou.org> We believe that the bug you reported is fixed in the latest version of ruby-lapack, which is due to be installed in the Debian FTP archive. A summary of the changes between this version and the previous one is attached. Thank you for reporting the bug, which will now be closed. If you have further comments please address them to 994...@bugs.debian.org, and the maintainer will reopen the bug report if appropriate. Debian distribution maintenance software pp. Youhei SASAKI <uwab...@gfd-dennou.org> (supplier of updated ruby-lapack package) (This message was generated automatically at their request; if you believe that there is a problem with it please contact the archive administrators by mailing ftpmas...@ftp-master.debian.org) -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Format: 1.8 Date: Fri, 05 Nov 2021 21:05:06 +0900 Source: ruby-lapack Architecture: source Version: 1.8.2-1 Distribution: unstable Urgency: medium Maintainer: Debian Ruby Team <pkg-ruby-extras-maintain...@lists.alioth.debian.org> Changed-By: Youhei SASAKI <uwab...@gfd-dennou.org> Closes: 994241 996311 Changes: ruby-lapack (1.8.2-1) unstable; urgency=medium . [ Utkarsh Gupta ] * Add salsa-ci.yml . [ Debian Janitor ] * debian/copyright: use spaces rather than tabs to start continuation lines. * Bump debhelper from old 11 to 12. * Set debhelper-compat version in Build-Depends. * Drop transition for old debug package migration. . [ Cédric Boutillier ] * [ci skip] Update team name * [ci skip] Add .gitattributes to keep unwanted files out of the source package . [ Youhei SASAKI ] * Update Depends: ruby-narray >= 0.6.1.2-4 (Closes: #996311) * Add Rules-Requires-Root: no * New upstream version 1.8.2 (Closes: #994241) * update d/watch: use https * Bump debhelper compatibility level to 13 * Bump Standards-Version to 4.6.0 (no changes needed) * Add d/souce/lintian-overrides: ignore too long lines for auto-generated files Checksums-Sha1: d7be0221fc8165a8110134f4b03df0577fbb1b87 2087 ruby-lapack_1.8.2-1.dsc 6d5c290efdc0c7bbe2e75441e9c4970828efe238 4109042 ruby-lapack_1.8.2.orig.tar.gz bdfdc84b56837c2ba0fd71b6f0e10c8dc6a3431d 9260 ruby-lapack_1.8.2-1.debian.tar.xz 2cbcad39c4085032beb9f4cb521ac35b94216ee4 9557 ruby-lapack_1.8.2-1_amd64.buildinfo Checksums-Sha256: aa57b4fa5fb7bc11df8fb4f2315e22d5d0e2e856a6758040c8c39408f6ee20af 2087 ruby-lapack_1.8.2-1.dsc 07d21871bfd547db9b8b0699ad29a218e2a95e725d07c75af37953dec2c0bff9 4109042 ruby-lapack_1.8.2.orig.tar.gz 62e477866de27ac1c0c7ba74901ea4a370fe36e0bf4d03991a4678742165fa71 9260 ruby-lapack_1.8.2-1.debian.tar.xz 016c3d92bc8fb8d7a96c0e6606229b27c78585872e9ed3984399523dee33a24a 9557 ruby-lapack_1.8.2-1_amd64.buildinfo Files: 8e4e5dd98097d95f585a48b4af142459 2087 ruby optional ruby-lapack_1.8.2-1.dsc ff97e054ea52f8f23604a273dcaacd9b 4109042 ruby optional ruby-lapack_1.8.2.orig.tar.gz 18e18de8c15e50e20132af3daf26154a 9260 ruby optional ruby-lapack_1.8.2-1.debian.tar.xz 1aea881a132c360379c85bdf0bd1b7cb 9557 ruby optional ruby-lapack_1.8.2-1_amd64.buildinfo -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEZqTqcE/iQFWNasLmk5TzVIkdfgcFAmGFx44ACgkQk5TzVIkd fgefmA/+PGa8f90uRGML7wBZ7SHURX74fvj+LeBjIR5HJ9FdbRmYlfSaJ3p3HXfh 1E8tUlG0okOdRvscG71pm1ZBBSHFogiT5IjXtg0Yobpn/OLFvxe2z8VaZItfgCKn 6mIeciHx/OWmscD5VmeVxx0R7pC7XBpNTW7MRqeyCKCMyQ6MsZLQx8CnCwl3UVs2 SAJdRHxih7xvyrDzdcJlDva3FnCzwuAaJ2KwSKWhkyaLBxvIcg0CzwdA9jN/k/9S XLWbnXdoKtPXAC+ch1M9xOIulCe5w2+XIUx92RMaPYNelShZ/2dK/Jn0bONtzzHY WCec0WAnFIYcKqaiJFO04eozf3fvhAIheWeIgSIIhiONi9mjJoyCoKRROIlL4r+G skJMNemdfOSkWGRFFvT8vFfNMyTW0VWKMuAXlEqwHQjqc0GLrC0YvSkmxoNJu7qB tG0xDY4JbGtpVwexZCRrIaNc2ghZU8/VBuZf9Npo03GbbroD93CtGZFH00b2b336 jeQRL4A6CzSYd4hk4lGDCFDHOp8nkiK+TtGXcwNNlNR8br77hCvNo++U6SQR9+FA 1FZfz5oCXczotf6pAeJWhh3QxjmmjFPSUZ/kmCMRmID6UC5DK6/PrNr+DGuXDRhq JXnnWmtfEn7RzzQZy2uO/gzSDUz/4WY3UezV0a/rJC/V3gVV2Eg= =rEuj -----END PGP SIGNATURE-----
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