[Bug 1007457] Re: Bogus FPE on underflow for exp(double)

[Peter van Hoof]

Is anybody looking at this? This is a critical bug that completely
breaks our code. Many of our users have Ubuntu installed and are
suffering because of this. So a quick fix would be appreciated. The link
shown above contains the patch, so fixing this should be easy and quick.
An identical bug report against openSUSE was fixed in 28 hours. This
report is already more than 3 weeks old...

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https://bugs.launchpad.net/bugs/1007457

Title:
  Bogus FPE on underflow for exp(double)

Status in “eglibc” package in Ubuntu:
  New

Bug description:
  Glibc version 2.15 has a bug causing spurious FP crashes when calling
  exp(). It has been reported here:

  http://sourceware.org/bugzilla/show_bug.cgi?id=13705

  You can find all the details, including a testcase and the patch for
  libm in this report. I found that the 64-bit version of precise ships
  a version of glibc that still has this bug. I have not tested the
  32-bit version, but I assume it has the same problem.

  I am one of the developers of the open source code Cloudy and this bug
  renders our code completely non-functional. I would therefore like to
  urge you to ship this patch as an update for the precise distribution,
  especially since this is a LTS release.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: libc6 2.15-0ubuntu10
  ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
  Uname: Linux 3.2.0-24-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu8
  Architecture: amd64
  Date: Fri Jun  1 16:33:54 2012
  InstallationMedia: Kubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
  ProcEnviron:
   LC_TIME=en_DK.utf8
   TERM=vt100
   LANG=en_US.UTF-8
   SHELL=/bin/tcsh
  SourcePackage: eglibc
  UpgradeStatus: Upgraded to precise on 2012-05-07 (25 days ago)

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