TYPO3 Core

I get a syslog entry. But I do not know from where in the code this comes from. I need a back trace to see where this had happened.

The following SQL has been executed:

$query INSERT INTO sys_log
(
userid,
type,
action,
error,
details_nr,
details,
IP,
tstamp,
workspace
) VALUES (
'2',
'5',
'0',
'1',
'0',
'Core: Error handler (FE): PHP Warning: fopen() [<a href=\'function.fopen\'>function.fopen</a>]: Filename cannot be empty in /path/typo3cms/typo3_src-4.3.3/t3lib/class.t3lib_div.php line 5435',
'89.204.153.69',
'1281962442',
'0'
);

Pg60 exec_INSERTquery(sys_log) - #->handleError // class.t3lib_error_errorhandler.php#14196->writeLog // class.t3lib_error_errorhandler.php#14196->exec_INSERTquery

(issue imported from #M15468)