wp_get_users_with_no_role() does not handle user roles which contain numbers

[chillbram]

The function ​wp_get_users_with_no_role() does not correctly ascertain which roles it needs to search for. Before it queries the database it changes the names for roles which contain numbers (and special characters for that matter). It uses the following regex to adapt the list of roles it gets from ​wp_roles()->get_names():

<?php
$regex = implode( '|', array_keys( $role_names ) );
$regex = preg_replace( '/[^a-zA-Z_\|-]/', '', $regex );

This results in roles with names like "Year1" and "Group1Admins" to be truncated to "Year" and "GroupAdmins" respectively before querying.

This could be easily solved by extending the regex pattern to also accept numbers:

<?php
$regex = preg_replace( '/[^0-9a-zA-Z_\|-]/', '', $regex );