[mdlug] grep bug?

[Robert Meier]

Robert,

> A little sleuthing suggests that grep is stuck in some kind of infinite loop:
> I was wondering if folks here could confirm this behaviour on their
> boxes, especially on non-Ubuntu 7.10 installs.
> Here it is in script form:

Thank you for taking the time to write the script.

A clean test case like this will make debugging much easier.



Status: Demonstrated
  System: SuSE-10.0
  IA:	  x86
  X:	  xorg-x11-Xvnc-6.8.2-100

  The following was tried with identical results in
    non-graphical terminal
    konsole
    xterm

  bash> grep -V | head -1
  grep (GNU grep) 2.5.1

  bash> rpm -qf $(which grep)
  grep-2.5.1a-5

  bash> for mode in -i ''
        do
          for pat in ^ e
          do
            (echo hello | grep $mode --color=always -e $pat |
             head -c100 | wc -c )
          done
        done
  100
  19
  6
  19

Another country heard from,
-- 
Bob

  "My private keys are mine alone.
   My public keys to many shown.
   My secret keys with some are shared,
   But with only one message paired."
     -- Robert Meier 2001 excerpt from "Open-PGP Polka"