bug#19420: closed (intermittent segfault using grep -P)

[GNU bug Tracking System]

Your message dated Tue, 23 Nov 2021 19:03:08 -0800
with message-id <339e3eb7-0593-6279-11cf-1a5c227d55c7@cs.ucla.edu>
and subject line Re: bug#19420: intermittent segfault using grep -P
has caused the debbugs.gnu.org bug report #19420,
regarding intermittent segfault using grep -P
to be marked as done.

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-- 
19420: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=19420
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> --- Begin Message ---
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> Subject: 
>
> intermittent segfault using grep -P
>
>
>
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> Date: 
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> Sat, 20 Dec 2014 10:55:24 +0100
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> User-agent: 
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> Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0
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>
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> When using the following command, *most* of the time I get a 
> Segmentation fault (10 out of 16 times):
>
> € cat grepTxt | grep -P 'b(?:(?!tom).)+'
> Segmentation fault (core dumped)
>
> This happens with the  grep version that came with my Linux installation:
>
> € grep -V
> grep (GNU grep) 2.16
>
> I am on:
>
> NAME="Ubuntu"
> VERSION="14.04.1 LTS, Trusty Tahr"
>
> But also compiled grep from sources 
> (http://ftp.gnu.org/gnu/grep/grep-2.21.tar.xz) with the same problem.
>
> libpcre3:amd64; libpcre3:i386; libpcre3-dev:amd64; libpcrecpp0:amd64 are 
> all 1:8.31-2ubuntu2
>
> I tried to reduce the regex and the text as much as possible to still 
> reproduce the issue most of the time, unfortunately the text is still 
> 16893 bytes long. As I don't know if it is OK to attach such a long 
> file, I put it on pastebin, but will expire in a month.
>
> http://pastebin.com/download.php?i=jsHskMAA
>
> Please advise.
>
> Kind regards,
>
> JP
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#19420: intermittent segfault using grep -P
>
>
>
>
> Date: 
>
> Tue, 23 Nov 2021 19:03:08 -0800
>
>
>
>
> User-agent: 
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> Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.3.0
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>
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>
> I'm closing this old Grep bug report, on two grounds:
>
> * I can no longer reproduce the the problem on Fedora 35 x86-64, using 
> Norihiro Tanaka's test case <https://bugs.gnu.org/19420#20>. This 
> suggests the PCRE library has been fixed.
>
> * GNU Grep has switched to PCRE2, so PCRE bugs shouldn't matter now. See 
> <https://bugs.gnu.org/47264>.
>
>
> --- End Message ---