I use Piwik as web analytics application on my site. This application create a cookie key with a * character. When eZ Publish save this Cookie in a stash cache file, the site is broken.

example in phperror.log

PHP Parse error: syntax error, unexpected '*' in /ezpublish/cache/prod/stash/0fea6a13c52b4d47/25368f24b045ca84/ea89d5a5fa57ab5b/b4f9262a31f00ac7.php on line 2

b4f9262a31f00ac7.php

<?php
/* Cachekey: cache/ez_user_hash/_pk_id.190.52a7=67f08ff5ed0cf27d.1384950943.2.1385022003.1384952298.; ezsessid86af0f3a92ebf2d522cb0a6948f16d27=0dd9b3f52482a8884faffefaeb395e90; is_logged_in=true; _pk_cvar.190.52a7=%7b%221%22%3a%5b%22user%22%2c%22admin%22%5d%7d; _pk_ses.190.52a7=*/ */
/* Type: array */
$expiration = 1385022546;
$data = array();

/* Child Type: string */
$data['return'] = "ec35701ab7f34b037ee156a397bfb2ed255acc0c";

/* Child Type: integer */
$data['createdOn'] = 1385022005;