GNU bug report logs - #16586
grep: infinite loop in grep -P on some files with invalid UTF-8 sequences

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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#16586: closed (grep: infinite loop in grep -P on some files
 with invalid UTF-8 sequences)
Date: Tue, 15 Apr 2014 14:50:02 +0000

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

Your message dated Tue, 15 Apr 2014 07:48:51 -0700
with message-id <534D46D3.7070804 <at> cs.ucla.edu>
and subject line Re: bug#16586: grep: infinite loop in grep -P on some files with invalid UTF-8 sequences
has caused the debbugs.gnu.org bug report #16586,
regarding grep: infinite loop in grep -P on some files with invalid UTF-8 sequences
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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From: Santiago <santiago <at> debian.org>
To: submit <at> debbugs.gnu.org
Subject: grep: infinite loop in grep -P on some files with invalid UTF-8
 sequences
Date: Wed, 29 Jan 2014 10:43:46 +0100

Package: grep
Version: 2.16
Severity: important

Hi there,

I forward this bug from debian's BTS. Last changes in -P brought another
problem. I've confirmed this behavior on last debian package:

----- Forwarded message from Vincent Lefevre <vincent <at> vinc17.net> -----

[snip]


grep -P loops on some files with invalid UTF-8 sequences, e.g.

$ /usr/bin/printf "\xe9\x65\n\xab\n" | grep -P '.e|.?z' | head
�e
�e
�e
�e
�e
�e
�e
�e
�e
�e

(the infinite loop is interrupted here by a broken pipe due to
the "head").

It seems that the fix of

  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=730472

didn't solve all the problems.

-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.12-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages grep depends on:
ii  dpkg          1.17.6
ii  install-info  5.2.0.dfsg.1-2
ii  libc6         2.17-97
ii  libpcre3      1:8.31-2

grep recommends no packages.

grep suggests no packages.

-- no debconf information


----- End forwarded message -----

[Message part 3 (message/rfc822, inline)]

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Santiago <santiago <at> debian.org>, 736919 <at> bugs.debian.org
Cc: 16586-done <at> debbugs.gnu.org
Subject: Re: bug#16586: grep: infinite loop in grep -P on some files with
 invalid UTF-8 sequences
Date: Tue, 15 Apr 2014 07:48:51 -0700

Santiago wrote:
> it was a debian-pcre-specific bug.

Thanks, closing the bug upstream.

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