Ticket #38234: 38234.patch

src/wp-includes/user.php

@@ -2440 +2440 @@
         }
 
         $prefix = $wpdb->get_blog_prefix();
-        $regex  = implode( '|', wp_roles()->get_names() );
+        $regex  = implode( '|', array_keys( wp_roles()->get_names() ) );
         $regex  = preg_replace( '/[^a-zA-Z_\|-]/', '', $regex );
         $users  = $wpdb->get_col( $wpdb->prepare( "
                 SELECT user_id