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: Sergei Trofimovich <slyfox <at> gentoo.org>
Subject: bug#22655: closed (Re: 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 bug report

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

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 22655 <at> debbugs.gnu.org.

-- 
22655: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=22655
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: 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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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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