php 8.1 deprecated

I'm a bit puzzled by these lines in the call stack, compared to the reported version 2.0.x.

First of all, we don't have line 834 or preg_quote in the code base for 2.0.x-dev.
We do use preg_match in the 1.x version for both Drupal 7 and 8/9/10, so we should probably stress test these values a bit and see whether NULL is being passed sometimes.

I've gone through the code for D7 and D8/9/10 and I can't see any situation where we would pass null to any parameter of the preg_* functions.

So I'll close this one for now. Feel free to reopen if you disagree.

I just got this with php 8.1.27 and eu_cookie_compliance 1.x-dev
Deprecated function: preg_quote(): Passing null to parameter #1 ($str) of type string is deprecated in Drupal\Core\Path\PathMatcher->matchPath() (line 80 of /srv/web/aegir/platforms/cforge/web/core/lib/Drupal/Core/Path/PathMatcher.php)

#0 /srv/web/aegir/platforms/cforge/web/core/includes/bootstrap.inc(347): _drupal_error_handler_real()
#1 [internal function]: _drupal_error_handler()
#2 /srv/web/aegir/platforms/cforge/web/core/lib/Drupal/Core/Path/PathMatcher.php(80): preg_quote()
#3 /srv/web/aegir/platforms/cforge/web/modules/eu_cookie_compliance/eu_cookie_compliance.module(849): Drupal\Core\Path\PathMatcher->matchPath()
#4 /srv/web/aegir/platforms/cforge/web/core/lib/Drupal/Core/Extension/ModuleHandler.php(562): eu_cookie_compliance_js_alter()

The location according to admin/reports/dblog was /core/install.php/?rewrite=ok
which was called by a bot, no doubt.
No wonder you couldn't find it!