Your message dated Tue, 25 Apr 2017 19:47:13 +0000 with message-id <e1d36qb-0009cc...@fasolo.debian.org> and subject line Bug#855606: fixed in glibc 2.19-18+deb8u8 has caused the Debian Bug report #855606, regarding sqrt() regression on powerpc/jessie 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.) -- 855606: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=855606 Debian Bug Tracking System Contact ow...@bugs.debian.org with problems
--- Begin Message ---Package: libc6 Version: 2.19-18+deb8u7 Severity: normal Tags: jessie The following C program produces different output on Jessie and Sid. I believe the Sid output is the correct one, and in fact this is the output that has been observed for the "point" (and "polygon") regression tests for PostgreSQL on all platforms for the last 20 years since the test got added. $ cat sqrt.c #include <math.h> #include <stdio.h> #include <fenv.h> double pg_hypot(double x, double y) { double yx; /* Some PG-specific code deleted here */ /* Else, drop any minus signs */ x = fabs(x); y = fabs(y); /* Swap x and y if needed to make x the larger one */ if (x < y) { double temp = x; x = y; y = temp; } /* * If y is zero, the hypotenuse is x. This test saves a few cycles in * such cases, but more importantly it also protects against * divide-by-zero errors, since now x >= y. */ if (y == 0.0) return x; /* Determine the hypotenuse */ yx = y / x; return x * sqrt(1.0 + (yx * yx)); } int main () { //fesetround(FE_TONEAREST); printf("fegetround is %d\n", fegetround()); double r = pg_hypot(10.0, 10.0); printf("14 %.14g\n", r); printf("15 %.15g\n", r); printf("16 %.16g\n", r); printf("17 %.17g\n", r); return 0; } Jessie output: fegetround is 0 14 14.142135623731 15 14.1421356237309 16 14.14213562373095 17 14.142135623730949 Sid output: fegetround is 0 14 14.142135623731 15 14.142135623731 16 14.14213562373095 17 14.142135623730951 The Sid output is also observed when running the binary compiled on Jessie on Sid, so it's a library issue, not a compiler/binary one. The problem might be due to the fix for #843904. FTBFS in postgresql-9.4 in jessie-pu: https://buildd.debian.org/status/fetch.php?pkg=postgresql-9.4&arch=powerpc&ver=9.4.11-0%2Bdeb8u1&stamp=1487473754&raw=0 FTBFS in postgresql-9.6 in jessie-backports: https://buildd.debian.org/status/fetch.php?pkg=postgresql-9.6&arch=powerpc&ver=9.6.1-2~bpo8%2B1&stamp=1485184696&raw=0 Thread on pgsql-hackers: https://www.postgresql.org/message-id/20170220155819.m2s43pf2pvkes4pc%40msg.credativ.de Christoph
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--- Begin Message ---Source: glibc Source-Version: 2.19-18+deb8u8 We believe that the bug you reported is fixed in the latest version of glibc, 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 855...@bugs.debian.org, and the maintainer will reopen the bug report if appropriate. Debian distribution maintenance software pp. Aurelien Jarno <aure...@debian.org> (supplier of updated glibc 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: Mon, 24 Apr 2017 06:41:38 +0200 Source: glibc Binary: libc-bin libc-dev-bin glibc-doc glibc-source locales locales-all nscd multiarch-support libc6 libc6-dev libc6-dbg libc6-pic libc6-udeb libc6.1 libc6.1-dev libc6.1-dbg libc6.1-pic libc6.1-udeb libc0.3 libc0.3-dev libc0.3-dbg libc0.3-pic libc0.3-udeb libc0.1 libc0.1-dev libc0.1-dbg libc0.1-pic libc0.1-udeb libc6-i386 libc6-dev-i386 libc6-sparc libc6-dev-sparc libc6-sparc64 libc6-dev-sparc64 libc6-s390 libc6-dev-s390 libc6-amd64 libc6-dev-amd64 libc6-powerpc libc6-dev-powerpc libc6-ppc64 libc6-dev-ppc64 libc6-mips32 libc6-dev-mips32 libc6-mipsn32 libc6-dev-mipsn32 libc6-mips64 libc6-dev-mips64 libc0.1-i386 libc0.1-dev-i386 libc6-x32 libc6-dev-x32 libc6-i686 libc6-xen libc0.1-i686 libc0.3-i686 libc0.3-xen libc6.1-alphaev67 libc6-loongson2f libnss-dns-udeb libnss-files-udeb Architecture: source all Version: 2.19-18+deb8u8 Distribution: stable Urgency: medium Maintainer: Aurelien Jarno <aure...@debian.org> Changed-By: Aurelien Jarno <aure...@debian.org> Description: glibc-doc - GNU C Library: Documentation glibc-source - GNU C Library: sources libc-bin - GNU C Library: Binaries libc-dev-bin - GNU C Library: Development binaries libc0.1 - GNU C Library: Shared libraries libc0.1-dbg - GNU C Library: detached debugging symbols libc0.1-dev - GNU C Library: Development Libraries and Header Files libc0.1-dev-i386 - GNU C Library: 32bit development libraries for AMD64 libc0.1-i386 - GNU C Library: 32bit shared libraries for AMD64 libc0.1-i686 - GNU C Library: Shared libraries [i686 optimized] libc0.1-pic - GNU C Library: PIC archive library libc0.1-udeb - GNU C Library: Shared libraries - udeb (udeb) libc0.3 - GNU C Library: Shared libraries libc0.3-dbg - GNU C Library: detached debugging symbols libc0.3-dev - GNU C Library: Development Libraries and Header Files libc0.3-i686 - GNU C Library: Shared libraries [i686 optimized] libc0.3-pic - GNU C Library: PIC archive library libc0.3-udeb - GNU C Library: Shared libraries - udeb (udeb) libc0.3-xen - GNU C Library: Shared libraries [Xen version] libc6 - GNU C Library: Shared libraries libc6-amd64 - GNU C Library: 64bit Shared libraries for AMD64 libc6-dbg - GNU C Library: detached debugging symbols libc6-dev - GNU C Library: Development Libraries and Header Files libc6-dev-amd64 - GNU C Library: 64bit Development Libraries for AMD64 libc6-dev-i386 - GNU C Library: 32-bit development libraries for AMD64 libc6-dev-mips32 - GNU C Library: o32 Development Libraries for MIPS libc6-dev-mips64 - GNU C Library: 64bit Development Libraries for MIPS64 libc6-dev-mipsn32 - GNU C Library: n32 Development Libraries for MIPS64 libc6-dev-powerpc - GNU C Library: 32bit powerpc development libraries for ppc64 libc6-dev-ppc64 - GNU C Library: 64bit Development Libraries for PowerPC64 libc6-dev-s390 - GNU C Library: 32bit Development Libraries for IBM zSeries libc6-dev-sparc - GNU C Library: 32bit Development Libraries for SPARC libc6-dev-sparc64 - GNU C Library: 64bit Development Libraries for UltraSPARC libc6-dev-x32 - GNU C Library: X32 ABI Development Libraries for AMD64 libc6-i386 - GNU C Library: 32-bit shared libraries for AMD64 libc6-i686 - GNU C Library: Shared libraries [i686 optimized] libc6-loongson2f - GNU C Library: Shared libraries (Loongson 2F optimized) libc6-mips32 - GNU C Library: o32 Shared libraries for MIPS libc6-mips64 - GNU C Library: 64bit Shared libraries for MIPS64 libc6-mipsn32 - GNU C Library: n32 Shared libraries for MIPS64 libc6-pic - GNU C Library: PIC archive library libc6-powerpc - GNU C Library: 32bit powerpc shared libraries for ppc64 libc6-ppc64 - GNU C Library: 64bit Shared libraries for PowerPC64 libc6-s390 - GNU C Library: 32bit Shared libraries for IBM zSeries libc6-sparc - GNU C Library: 32bit Shared libraries for SPARC libc6-sparc64 - GNU C Library: 64bit Shared libraries for UltraSPARC libc6-udeb - GNU C Library: Shared libraries - udeb (udeb) libc6-x32 - GNU C Library: X32 ABI Shared libraries for AMD64 libc6-xen - GNU C Library: Shared libraries [Xen version] libc6.1 - GNU C Library: Shared libraries libc6.1-alphaev67 - GNU C Library: Shared libraries (EV67 optimized) libc6.1-dbg - GNU C Library: detached debugging symbols libc6.1-dev - GNU C Library: Development Libraries and Header Files libc6.1-pic - GNU C Library: PIC archive library libc6.1-udeb - GNU C Library: Shared libraries - udeb (udeb) libnss-dns-udeb - GNU C Library: NSS helper for DNS - udeb (udeb) libnss-files-udeb - GNU C Library: NSS helper for files - udeb (udeb) locales - GNU C Library: National Language (locale) data [support] locales-all - GNU C Library: Precompiled locale data multiarch-support - Transitional package to ensure multiarch compatibility nscd - GNU C Library: Name Service Cache Daemon Closes: 796106 855606 Changes: glibc (2.19-18+deb8u8) stable; urgency=medium . [ Aurelien Jarno ] * Update from upstream stable branch: - Fix PowerPC sqrt inaccuracy. Closes: #855606. * patches/any/cvs-resolv-internal-qtype.diff: patch from upstream to fix a NULL pointer dereference in libresolv when receiving a T_UNSPEC internal QTYPE (CVE-2015-5180). Closes: #796106. 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