Description:
------------
PHP crashes while using the ibase event alerter feature with firebird 1.5.1.

I am using Apache 2.0.50, Firebird 1.5.1 and finally PHP 5.0.1.

I execute the script, which is waiting for an db event. When the event happens, Dr.Watson appeares and PHP crashes.



Reproduce code:
---------------
function event_handler($event_name, $connection) 
{
	echo "<br>ein event";
    if ($event_name=="RBS_UPDATE") {
        $query = "SELECT RBS_RFPI, RBS_ISON FROM TBL_RBS ORDER BY RBS_RFPI";
		$result = ibase_query($query);

		while ($row = ibase_fetch_object ($result)) {
      		// echo $row->RBS_RFPI . "  " . $row->RBS_ISON . "<br>";
	   		echo "<script type='text/javascript'> updateRBSState('$row->RBS_RFPI',s".$row->RBS_ISON."); </script>";
}
    } 
}

ibase_set_event_handler($connection, "event_handler", "RBS_UPDATE");

ibase_wait_event($connection, "RBS_UPDATE");

Expected result:
----------------
After receiving the event, the callback function should write the output to the browser.

Actual result:
--------------
Sorry, no backtrace...

Receiving the result ends in Dr.Watson for PHP