GNU bug report logs - #16499
GNU grep-2.16-1.mga4 , grep-2.16 from sources and grep from git master HEAD get stuck during an LC_ALL=en_US.UTF-8 search inside a short binary file

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Jim Meyering <jim <at> meyering.net>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#16499: closed (GNU grep-2.16-1.mga4 , grep-2.16 from sources
 and grep from git master HEAD get stuck during an LC_ALL=en_US.UTF-8
 search inside a short binary file)
Date: Tue, 21 Jan 2014 23:57:02 +0000

[Message part 1 (text/plain, inline)]

Your message dated Tue, 21 Jan 2014 15:56:21 -0800
with message-id <CA+8g5KEW=jkzWj4BpwL-P_UEtzwXvDeOi4ywz-0d2mqvPiSKwA <at> mail.gmail.com>
and subject line Re: GNU grep-2.16-1.mga4 , grep-2.16 from sources and grep from git master HEAD get stuck during an LC_ALL=en_US.UTF-8 search inside a short binary file
has caused the debbugs.gnu.org bug report #16499,
regarding GNU grep-2.16-1.mga4 , grep-2.16 from sources and grep from git master HEAD get stuck during an LC_ALL=en_US.UTF-8 search inside a short binary file
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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16499: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=16499
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Contact help-debbugs <at> gnu.org with problems

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From: Shlomi Fish <shlomif <at> shlomifish.org>
To: bug-grep <at> gnu.org
Subject: GNU grep-2.16-1.mga4 , grep-2.16 from sources and grep from git
 master HEAD get stuck during an LC_ALL=en_US.UTF-8 search inside a short
 binary file
Date: Sun, 19 Jan 2014 17:10:11 +0200

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Hi all,

after I save the attached file as 1.dat , I see that grep -iP on '^Subject:'
or on '^S' gets stuck in the en_US.UTF-8 locale. It is fine in pcregrep and in
ack.

[SHELL]
shlomif <at> telaviv1:~$ time LC_ALL=en_US.UTF-8
~/apps/TEST-grep-from-git-TO-DEL/bin/grep -iP '^Subject:' < 1.dat ^C

real    0m4.199s
user    0m4.195s
sys     0m0.003s
shlomif <at> telaviv1:~$ time LC_ALL=en_US.UTF-8
~/apps/TEST-grep-from-git-TO-DEL/bin/grep -iP '^S' < 1.dat ^C

real    0m3.486s
user    0m3.485s
sys     0m0.001s
shlomif <at> telaviv1:~$ time LC_ALL=en_US.UTF-8
~/apps/TEST-grep-from-git-TO-DEL/bin/grep -iE '^S' < 1.dat

real    0m0.002s
user    0m0.002s
sys     0m0.000s
shlomif <at> telaviv1:~$ time LC_ALL=en_US.UTF-8
~/apps/TEST-grep-from-git-TO-DEL/bin/grep -P '^S' < 1.dat ^C

real    0m1.887s
user    0m1.885s
sys     0m0.000s
shlomif <at> telaviv1:~$ time LC_ALL=en_US.UTF-8
~/apps/TEST-grep-from-git-TO-DEL/bin/grep -P '^Subject:' < 1.dat

real    0m0.003s
user    0m0.000s
sys     0m0.002s
shlomif <at> telaviv1:~$ time LC_ALL=en_US.UTF-8
~/apps/TEST-grep-from-git-TO-DEL/bin/grep -P '^Subject:' < 1.dat time LC_ALL=C
~/apps/TEST-grep-from-git-TO-DEL/bin/grep -iP '^Subject:' < 1.dat

real    0m0.003s
user    0m0.001s
sys     0m0.001s
shlomif <at> telaviv1:~$ time LC_ALL=C pcregrep -i '^Subject:' < 1.dat

real    0m0.002s
user    0m0.001s
sys     0m0.000s
shlomif <at> telaviv1:~$ time LC_ALL=C ack -i '^Subject:' 1.dat

real    0m0.066s
user    0m0.059s
sys     0m0.007s
shlomif <at> telaviv1:~$ time LC_ALL=en_US.UTF-8 ack -i '^Subject:' 1.dat

real    0m0.070s
user    0m0.063s
sys     0m0.006s
[/SHELL]

The same thing happens with grep-2.16 built from the sources. I'm on Mageia
Linux x86-64 Cauldron (what will be Mageia 4). 

shlomif <at> telaviv1:~$ ldd ~/apps/TEST-grep-from-git-TO-DEL/bin/grep 
        linux-vdso.so.1 (0x00007fff2a7fe000)
        libpcre.so.1 => /lib64/libpcre.so.1 (0x00007f19ed302000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f19ecf4d000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f19ecd30000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f19ed568000)
shlomif <at> telaviv1:~$ rpm -qf /lib64/libpcre.so.1
lib64pcre1-8.33-2.mga4

Regards,

	Shlomi Fish

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[1.dat (application/octet-stream, attachment)]

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From: Jim Meyering <jim <at> meyering.net>
To: Shlomi Fish <shlomif <at> shlomifish.org>
Cc: Paolo Bonzini <bonzini <at> gnu.org>, shlomif <shlomif <at> gmail.com>,
 16499-done <at> debbugs.gnu.org
Subject: Re: GNU grep-2.16-1.mga4 , grep-2.16 from sources and grep from git
 master HEAD get stuck during an LC_ALL=en_US.UTF-8 search inside a short
 binary file
Date: Tue, 21 Jan 2014 15:56:21 -0800

tags 16499 notabug
close 16499
thanks

Thank you for investigating.  I agree that it sure looks like the bug
is in libpcre, and not in grep itself.  If you haven't already
reported it to libpcre developers, would you please do that?

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