Selector on roles behaves differently than expected

[esszett]

Short description of the issue

It seems that using the field 'roles' in selectors doesn't work exactly the same as one can see on other fields.

$s1 = "roles=aaa";
$s2 = "roles=aaa|guest";
$s3 = "roles=aaa|guest|notavailable";

echo $users->find($s1); //works, returns some users
echo $users->find($s2); //works, returns some more users
echo $users->find($s3); //returns empty pageArray !

Expected behavior

The third example should find at least the same users as the second example.

Actual behavior

The third selector with an OR value containing an non-existing role-name leads to an empty pageArray.

Steps to reproduce the issue

1. do a find on $users with selector roles='existing|other-existing'
2. compare the result with a find like roles='existing|other-existing|non-existing'

Setup/Environment

SERVER DETAILS
ProcessWire: 3.0.217
PHP: 8.0.28
Webserver: Apache/2.4.57 (Unix) OpenSSL/1.1.1t
MySQL Server: 10.11.3-MariaDB
MySQL Client: mysqlnd 8.0.28

[BitPoet]

This actually affects all queries for page references, not just roles/users, e.g.

$pages->find('mypagereffield=home|about|notavailable');

As a workaround, one can use (less performant) OR-groups.

$users->find('(roles=aaa), (roles=guest), (roles=notavailable)');

[ryancramerdesign]

@esszett @BitPoet Thanks, I've pushed an attempted fix for this issue.

[esszett]

@ryancramerdesign
Processwire 3.0.220 is returning the expected result now. I confirm fixed.