$msg .= "File '". $line['file'] . "' line " . $line['line'] . "\n";
$msg .= " " . $line['function'] . "( " . $this->rec_join($line['args']) . ")\n";
$msg .= "File '". $line['file'] . "' line " . $line['line'] . "\n";
$msg .= " " . $line['function'] . "( " . $this->rec_join($line['args']) . ")\n";