set_error_handler(): duplicate error

<?php
//error_reporting(0);
set_error_handler(
     static function (int $severity, string $message, string $file, int 
$line): void {
         throw new InternalErrorException($message, 0, $severity, $file, 
$line);
     }
);

xxx();

Output:

Fatal error: Uncaught Error: Call to undefined function xxx() in 
/tmp/tmp.Ie1UVhkWcT/test.php on line 9

Error: Call to undefined function xxx() in /tmp/tmp.Ie1UVhkWcT/test.php 
on line 9

Call Stack:
     0.0001     392928   1. {main}() /tmp/tmp.Ie1UVhkWcT/test.php:0

Why error message showing is duplicate?
Furthermore, if uncommenting the error_reporting(0) instruction does not 
show any errors.
Is there a good compromise?