[Bug 1000498] Re: fmod() incorrectly returns NaN for (some?) denormalized inputs

[Brian Murray]

Hello Thomas, or anyone else affected,

Accepted eglibc into precise-proposed. The package will build now and be
available at http://launchpad.net/ubuntu/+source/eglibc/2.15-0ubuntu10.3
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please change the bug tag from
verification-needed to verification-done.  If it does not, change the
tag to verification-failed.  In either case, details of your testing
will help us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: eglibc (Ubuntu Precise)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

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https://bugs.launchpad.net/bugs/1000498

Title:
  fmod() incorrectly returns NaN for (some?) denormalized inputs

Status in Embedded GLIBC:
  Fix Released
Status in “eglibc” package in Ubuntu:
  Fix Released
Status in “eglibc” source package in Precise:
  Fix Committed
Status in “eglibc” source package in Quantal:
  Fix Released

Bug description:
  [Impact]
  When using fmod, some inputs will cause incorrect results.

  [Fix]
  An upstream eglibc patch (c5bfe3d5ba29d36563f1e4bd4f8d7336093ee6fc) fixes this particular issue.

  [Test Case]
  See comment https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/1000498/comments/1 for a C program that exhibits this issue.

  [Regression Potential]
  This adds the fixes for fmod and adds the appropriate test cases in eglibc.

  [Original Report]
  See http://sourceware.org/bugzilla/show_bug.cgi?id=14048.

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