1# From hankedr@dms.auburn.edu Sun Jan 28 12:25:43 2001 2# Received: from mail.actcom.co.il [192.114.47.13] 3# by localhost with POP3 (fetchmail-5.5.0) 4# for arnold@localhost (single-drop); Sun, 28 Jan 2001 12:25:43 +0200 (IST) 5# Received: by actcom.co.il (mbox arobbins) 6# (with Cubic Circle's cucipop (v1.31 1998/05/13) Sun Jan 28 12:27:08 2001) 7# X-From_: hankedr@dms.auburn.edu Sat Jan 27 15:15:57 2001 8# Received: from lmail.actcom.co.il by actcom.co.il with ESMTP 9# (8.9.1a/actcom-0.2) id PAA23801 for <arobbins@actcom.co.il>; 10# Sat, 27 Jan 2001 15:15:55 +0200 (EET) 11# (rfc931-sender: lmail.actcom.co.il [192.114.47.13]) 12# Received: from billohost.com (www.billohost.com [209.196.35.10]) 13# by lmail.actcom.co.il (8.9.3/8.9.1) with ESMTP id PAA15998 14# for <arobbins@actcom.co.il>; Sat, 27 Jan 2001 15:16:27 +0200 15# Received: from yak.dms.auburn.edu (yak.dms.auburn.edu [131.204.53.2]) 16# by billohost.com (8.9.3/8.9.3) with ESMTP id IAA00467 17# for <arnold@skeeve.com>; Sat, 27 Jan 2001 08:15:52 -0500 18# Received: (from hankedr@localhost) 19# by yak.dms.auburn.edu (8.9.3/8.9.3/Debian/GNU) id HAA24441; 20# Sat, 27 Jan 2001 07:15:44 -0600 21# Date: Sat, 27 Jan 2001 07:15:44 -0600 22# Message-Id: <200101271315.HAA24441@yak.dms.auburn.edu> 23# From: Darrel Hankerson <hankedr@dms.auburn.edu> 24# To: arnold@skeeve.com 25# Subject: [stolfi@ic.unicamp.br: Bug in [...]* matching with acute-u] 26# Mime-Version: 1.0 (generated by tm-edit 7.106) 27# Content-Type: message/rfc822 28# Status: R 29# 30# From: Jorge Stolfi <stolfi@ic.unicamp.br> 31# To: bug-gnu-utils@gnu.org 32# Subject: Bug in [...]* matching with acute-u 33# MIME-Version: 1.0 34# Reply-To: stolfi@ic.unicamp.br 35# X-MIME-Autoconverted: from 8bit to quoted-printable by grande.dcc.unicamp.br id GAA10716 36# Sender: bug-gnu-utils-admin@gnu.org 37# Errors-To: bug-gnu-utils-admin@gnu.org 38# X-BeenThere: bug-gnu-utils@gnu.org 39# X-Mailman-Version: 2.0 40# Precedence: bulk 41# List-Help: <mailto:bug-gnu-utils-request@gnu.org?subject=help> 42# List-Post: <mailto:bug-gnu-utils@gnu.org> 43# List-Subscribe: <http://mail.gnu.org/mailman/listinfo/bug-gnu-utils>, 44# <mailto:bug-gnu-utils-request@gnu.org?subject=subscribe> 45# List-Id: Bug reports for the GNU utilities <bug-gnu-utils.gnu.org> 46# List-Unsubscribe: <http://mail.gnu.org/mailman/listinfo/bug-gnu-utils>, 47# <mailto:bug-gnu-utils-request@gnu.org?subject=unsubscribe> 48# List-Archive: <http://mail.gnu.org/pipermail/bug-gnu-utils/> 49# Date: Sat, 27 Jan 2001 06:46:11 -0200 (EDT) 50# Content-Transfer-Encoding: 8bit 51# X-MIME-Autoconverted: from quoted-printable to 8bit by manatee.dms.auburn.edu id CAA14936 52# Content-Type: text/plain; charset=iso-8859-1 53# <mailto:bug-gnu-utils-request@gnu.org?subject=subscribe> 54# <mailto:bug-gnu-utils-request@gnu.org?subject=uns 55# Content-Length: 3137 56# 57# 58# 59# Hi, 60# 61# I think I have run into a bug in gawk's handling of REs of the 62# form [...]* when the bracketed list includes certain 8-bit characters, 63# specifically u-acute (octal \372). 64# 65# The problem occurs in GNU Awk 3.0.4, both under 66# Linux 2.2.14-5.0 (intel i686) and SunOS 5.5 (Sun sparc). 67# 68# Here is a program that illustrates the bug, and its output. 69# The first two lines of the output should be equal, shouldn't they? 70# 71# ---------------------------------------------------------------------- 72#! /usr/bin/gawk -f 73 74BEGIN { 75 s = "bananas and ananases in canaan"; 76 t = s; gsub(/[an]*n/, "AN", t); printf "%-8s %s\n", "[an]*n", t; 77 t = s; gsub(/[an�]*n/, "AN", t); printf "%-8s %s\n", "[an�]*n", t; 78 print ""; 79 t = s; gsub(/[a�]*n/, "AN", t); printf "%-8s %s\n", "[a�]*n", t; 80 print ""; 81 t = s; gsub(/[an]n/, "AN", t); printf "%-8s %s\n", "[an]n", t; 82 t = s; gsub(/[a�]n/, "AN", t); printf "%-8s %s\n", "[a�]n", t; 83 t = s; gsub(/[an�]n/, "AN", t); printf "%-8s %s\n", "[an�]n", t; 84 print ""; 85 t = s; gsub(/[an]?n/, "AN", t); printf "%-8s %s\n", "[an]?n", t; 86 t = s; gsub(/[a�]?n/, "AN", t); printf "%-8s %s\n", "[a�]?n", t; 87 t = s; gsub(/[an�]?n/, "AN", t); printf "%-8s %s\n", "[an�]?n", t; 88 print ""; 89 t = s; gsub(/[an]+n/, "AN", t); printf "%-8s %s\n", "[an]+n", t; 90 t = s; gsub(/[a�]+n/, "AN", t); printf "%-8s %s\n", "[a�]+n", t; 91 t = s; gsub(/[an�]+n/, "AN", t); printf "%-8s %s\n", "[an�]+n", t; 92} 93# ---------------------------------------------------------------------- 94# [an]*n bANas ANd ANases iAN cAN 95# [an�]*n bananas and ananases in canaan 96# 97# [a�]*n bANANas ANd ANANases iAN cANAN 98# 99# [an]n bANANas ANd ANANases in cANaAN 100# [a�]n bANANas ANd ANANases in cANaAN 101# [an�]n bANANas ANd ANANases in cANaAN 102# 103# [an]?n bANANas ANd ANANases iAN cANaAN 104# [a�]?n bANANas ANd ANANases iAN cANaAN 105# [an�]?n bANANas ANd ANANases iAN cANaAN 106# 107# [an]+n bANas ANd ANases in cAN 108# [a�]+n bANANas ANd ANANases in cANAN 109# [an�]+n bananas and ananases in canaan 110# ---------------------------------------------------------------------- 111# 112# Apparently the problem is specific to u-acute; I've tried several 113# other 8-bit characters and they seem to behave as expected. 114# 115# By comparing the second and third output lines, it would seem that the 116# problem involves backtracking out of a partial match of [...]* in 117# order to match the next sub-expression, when the latter begins with 118# one of the given characters. 119# 120# 121# All the best, 122# 123# --stolfi 124# 125# ------------------------------------------------------------------------ 126# Jorge Stolfi | http://www.dcc.unicamp.br/~stolfi | stolfi@dcc.unicamp.br 127# Institute of Computing (formerly DCC-IMECC) | Wrk +55 (19)3788-5858 128# Universidade Estadual de Campinas (UNICAMP) | +55 (19)3788-5840 129# Av. Albert Einstein 1251 - Caixa Postal 6176 | Fax +55 (19)3788-5847 130# 13083-970 Campinas, SP -- Brazil | Hom +55 (19)3287-4069 131# ------------------------------------------------------------------------ 132# 133# _______________________________________________ 134# Bug-gnu-utils mailing list 135# Bug-gnu-utils@gnu.org 136# http://mail.gnu.org/mailman/listinfo/bug-gnu-utils 137# 138# 139