Public bug reported:

# lsb_release -rd
Description:    Ubuntu 10.04.1 LTS
Release:        10.04

# apt-cache policy libc6
libc6:
  Installed: 2.11.1-0ubuntu7.2
  Candidate: 2.11.1-0ubuntu7.2

The strstr function is broken for certain classes of inputs.  This has
already been reported in upstream glibc at
http://sourceware.org/bugzilla/show_bug.cgi?id=12092.  The bug includes
a proposed fix.

I've verified that libc6 2.11.1-0ubuntu7.2 on Lucid exhibits this broken
behavior on a pre-SSE4 machine (a Xeon L5335).

I'm attaching Paul Pluzhnikov's code snippet from the upstream bug that
demonstrates the broken behavior.

** Affects: eglibc (Ubuntu)
     Importance: Undecided
         Status: New

-- 
strstr broken for some inputs on pre-SSE4 machines
https://bugs.launchpad.net/bugs/655463
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