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Bug #81640 preg_match compilation fails after upgrade from 7.4.25 to 7.4.26
Submitted: 2021-11-19 16:02 UTC Modified: 2021-11-22 11:43 UTC
Votes:22
Avg. Score:4.7 ± 0.6
Reproduced:22 of 22 (100.0%)
Same Version:18 (81.8%)
Same OS:16 (72.7%)
From: calvet dot thomas at gmail dot com Assigned: cmb (profile)
Status: Not a bug Package: PCRE related
PHP Version: 7.4.26 OS: Ubuntu
Private report: No CVE-ID: None
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 [2021-11-19 16:02 UTC] calvet dot thomas at gmail dot com 
Description:
------------
Hello, after upgrading from PHP 7.4.25 to PHP 7.4.26 on my servers, preg_match and preg_match_all compilation started to fail with the following error message: "PHP Warning:  preg_match_all(): Compilation failed: unrecognised compile-time option bit(s) at offset 0".
To resolve it I had to upgrade the libpcre2-8-0 package. The libpcre2-8-0 was at "version" 10.36, I upgraded it to "version" 10.39.


Test script:
---------------
preg_match('/abc/', 'foo');

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 [2021-11-19 17:22 UTC] cmb@php.net 
There is a respective downstream bug report[1].  Not sure which
one is not a bug. :)

[1] <https://github.com/oerdnj/deb.sury.org/issues/1682>
 [2021-11-20 22:28 UTC] phpbugs at icounsellor dot co dot uk 
Thank you for posting this.

I too upgraded Debian (php7.4 to v 7.4.26) and experienced the same runtime failures:-

>> PHP message: PHP Warning:  preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /home/sites/xxxxxxxx-redacted-xxxxxxx.php on line 235

Upgrading libpcre2-8-0 to version 10.36 (via Debian's testing distribution) solved my problems (yay!)

My guess: the PHP guys were expecting libpcre2-8-0 to have been upgraded to 10.36 in the stable channel but something hiccoughed/got out of sync.
 [2021-11-22 06:44 UTC] chamath dot gunasekara at gmail dot com 
I'm also getting this error in my Gitlab php 7.4 image

PHP Warning:  preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /builds/project_group/prj1/composer-setup.php on line 1076
Warning: preg_match(): Compilation failed: unrecognised compile-time option bit(s) at offset 0 in /builds/project_group/prj1/composer-setup.php on line 1076
Signature mismatch, could not verify the phar file integrity
The download failed repeatedly, aborting.
ERROR: Job failed: exit code 1

Today I got to know this issue. Please let us know how we can fix it.

Thanks
 [2021-11-22 08:51 UTC] mikijezi at gmail dot com 
Hello, I was this problem on Ubuntu 20.04.1 LTS, upgrade libpcre2-8-0 solve problem. I used:

apt install --only-upgrade libpcre2-8-0
 [2021-11-22 11:43 UTC] cmb@php.net
-Status: Open +Status: Not a bug -Assigned To: +Assigned To: cmb
 [2021-11-22 11:43 UTC] cmb@php.net 
See <https://github.com/PhilipHazel/pcre2/issues/56>.  Long story
short: don't ever build with a newer version than you use at
runtime.
 
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