Internal error when using '%' (modulus) arithmetic operator

[Kdecherf]

<?php

$i = 10; $ok = 5;

printf("Testing \$i % \$ok : %d",$i % $ok); ?>

Output : internal error java.lang.ArrayIndexOutOfBoundsException: -1

[Kdecherf]

Okay, it's just an unexpected behavior with printf() and unescaped '%' ... Closing this issue.