GNU bug report logs - #15524
Inconsistent case-sensitivity behavior

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Mark H Weaver <mhw <at> netris.org>
Subject: bug#15524: closed (Re:  Inconsistent case-sensitivity behavior)
Date: Sat, 08 Mar 2014 18:05:03 +0000

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Your bug report

#15524: Inconsistent case-sensitivity behavior

which was filed against the grep package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 15524 <at> debbugs.gnu.org.

-- 
15524: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=15524
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: 15524-done <at> debbugs.gnu.org
Subject: Re:  Inconsistent case-sensitivity behavior
Date: Sat, 08 Mar 2014 10:04:37 -0800

This bug has been fixed in later versions of grep.  I can reproduce the 
bug with grep 2.8 but not with grep 2.18, the current version.

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From: Mark H Weaver <mhw <at> netris.org>
To: bug-grep <at> gnu.org
Subject: Inconsistent case-sensitivity behavior
Date: Fri, 04 Oct 2013 01:39:15 -0400

Can anyone explain what's going on here?  Why does the regexp "^[a-z]*$"
match the line "FOO"?

   Regards,
     Mark

--8<---------------cut here---------------start------------->8---
mhw:~$ (echo foo; echo FOO) | grep '[a-z]'
foo
mhw:~$ (echo foo; echo FOO) | grep '^[a-z][a-z][a-z]$'
foo
mhw:~$ (echo foo; echo FOO) | grep '^[a-z]*$'
foo
FOO
mhw:~$ echo $LANG
en_US.UTF-8
mhw:~$ grep --version
grep (GNU grep) 2.8
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Mike Haertel and others, see <http://git.sv.gnu.org/cgit/grep.git/tree/AUTHORS>.
mhw:~$ export
declare -x COLUMNS="125"
declare -x DISPLAY=":0"
declare -x EDITOR="emacsclient"
declare -x EMACS="t"
declare -x HOME="/home/mhw"
declare -x HUSHLOGIN="FALSE"
declare -x HZ="100"
declare -x INPUTRC="/etc/inputrc"
declare -x INSIDE_EMACS="24.3.1,comint"
declare -x LANG="en_US.UTF-8"
declare -x LOGNAME="mhw"
declare -x LYNX_CFG="/home/mhw/lynx.cfg"
declare -x MAIL="/var/mail/mhw"
declare -x OLDPWD="/home/mhw/.local/share/guile/site/2.0"
declare -x PATH="/home/mhw/bin:/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin:/usr/local/sbin"
declare -x PS1="\\u:\\w\\\$ "
declare -x PWD="/home/mhw"
declare -x RATPOISON="ratpoison"
declare -x SHELL="/bin/bash"
declare -x SHLVL="4"
declare -x TERM="dumb"
declare -x TERMCAP=""
declare -x USER="mhw"
declare -x WINDOWPATH="7"
declare -x XAUTHORITY="/home/mhw/.Xauthority"
--8<---------------cut here---------------end--------------->8---

I'm using eglibc-2.13.  This is on a system I built myself based on
CLFS, but others have reported seeing the same behavior on Ubuntu.

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