GNU bug report logs - #22655
grep-2.21 (and git master): --null-data and ranges work in an odd way (-P works fine)

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#22655: closed (grep-2.21 (and git master): --null-data and
 ranges work in an odd way (-P works fine))
Date: Mon, 11 Apr 2016 04:50:02 +0000

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Your message dated Sun, 10 Apr 2016 21:49:23 -0700
with message-id <570B2CD3.9040908 <at> cs.ucla.edu>
and subject line Re: grep-2.21 (and git master): --null-data and ranges work in an odd way (-P works fine)
has caused the debbugs.gnu.org bug report #22655,
regarding grep-2.21 (and git master): --null-data and ranges work in an odd way (-P works fine)
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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22655: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=22655
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From: Sergei Trofimovich <slyfox <at> gentoo.org>
To: bug-grep <at> gnu.org
Cc: Jim Meyering <meyering <at> fb.com>, skvadrik <at> gmail.com,
 Paul Eggert <eggert <at> cs.ucla.edu>, ulm <at> gentoo.org,
 Norihiro Tanaka <noritnk <at> kcn.ne.jp>
Subject: grep-2.21 (and git master): --null-data and ranges work in an odd
 way (-P works fine)
Date: Sat, 13 Feb 2016 23:20:52 +0000

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The issue is found by Ulrich Mueller:

It seems DFA engine does not understand --null-data:

~/dev/git/grep $ cat a-test.sh 
#!/bin/bash

printf '12\n34\0' | LC_ALL=en_US.utf-8 src/grep -z    '^[1234yz]*$'  | wc -c
printf '12\n34\0' | LC_ALL=en_US.utf-8 src/grep -P -z '^[1234yz]*$'  | wc -c
printf '12\n34\0' | LC_ALL=en_US.utf-8 src/grep -z    '^[1234y-z]*$' | wc -c
printf '12\n34\0' | LC_ALL=en_US.utf-8 src/grep -P -z '^[1234y-z]*$' | wc -c

~/dev/git/grep $ ./a-test.sh 
0
6
6
6

All 4 should return 6 but first is not correct.
It seems that 'y-z' range disables dfa.c code and works fine.

-- 

  Sergei

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: 22655-done <at> debbugs.gnu.org
Subject: Re: grep-2.21 (and git master): --null-data and ranges work in an odd
 way (-P works fine)
Date: Sun, 10 Apr 2016 21:49:23 -0700

As this bug now appears to be fixed in grep master (or at least, as fixed as 
well as libpcre will allow), I'm closing it.

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