GNU bug report logs - #29446
GNU grep 3.1 fails test suite when PCRE lacks JIT

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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#29446: closed (GNU grep 3.1 fails test suite when PCRE lacks JIT)
Date: Wed, 09 Sep 2020 23:11:01 +0000

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Your message dated Wed, 9 Sep 2020 16:10:41 -0700
with message-id <5878c1f6-3f5c-f663-4276-d8eece95fe1d <at> cs.ucla.edu>
and subject line Re: GNU grep 3.1 fails test suite when PCRE lacks JIT
has caused the debbugs.gnu.org bug report #29446,
regarding GNU grep 3.1 fails test suite when PCRE lacks JIT
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: "A. Wilcox" <awilfox <at> adelielinux.org>
To: bug-grep <at> gnu.org
Subject: GNU grep 3.1 fails test suite when PCRE lacks JIT
Date: Sat, 25 Nov 2017 15:35:03 -0600

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Hi there grep developers,

I'm trying to package GNU grep 3.1 on 64-bit PowerPC (big-endian) for
our Linux distribution, Adélie Linux.  It seems to be working quite
well, except there is a failing test: pcre-jitstack.

"grep: internal PCRE error: -21" (which is PCRE_ERROR_RECURSIONLIMIT)
is printed.  I believe that this is because we have to disable JIT on
the ppc64 platform (because the JIT compiler is badly broken on it).

I am not very familiar with either of the grep or PCRE codebases so I
am not sure exactly how to best skip the test when PCRE does not have
JIT support enabled.  Otherwise, I would have included a patch.

Thank you for your time.

Best regards,
- --arw

- -- 
A. Wilcox (awilfox)
Project Lead, Adélie Linux
http://adelielinux.org
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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Thomas Deutschmann <whissi <at> gentoo.org>
Cc: "A. Wilcox" <awilfox <at> adelielinux.org>, 29446-done <at> debbugs.gnu.org
Subject: Re: GNU grep 3.1 fails test suite when PCRE lacks JIT
Date: Wed, 9 Sep 2020 16:10:41 -0700

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On 1/2/20 1:47 PM, Thomas Deutschmann wrote:

> I managed to reproduce the error using pure Debian:

Thanks, with that recipe I reproduced the problem on Ubuntu 18.04.5, and 
installed the attached. I'll boldly close the bug report.

libpcre is quite a pain to use, and makes 'grep' less reliable. Perhaps somebody 
with some time could see whether libpcre2 is any better.

[0001-grep-fix-PCRE-JIT-test-when-JIT-not-available.patch (text/x-patch, attachment)]

[0002-grep-fix-logic-for-growing-PCRE-JIT-stack.patch (text/x-patch, attachment)]

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