Error exporting models using csv_custom file format about october HOT 4 CLOSED

        if ($options['encoding'] !== null) {
            $csv->addFormatter((new CharsetConverter())
                ->inputEncoding('utf-8')
                ->outputEncoding($options['encoding'])
            );
        }

    /**
     * processExportDataAsCsv returns the export data as a CSV string
     */
    protected function processExportDataAsCsv($columns, $results, $options)
    {
        // Parse options
        $options = array_merge([
            'firstRowTitles' => true,
            'savePath' => null,
            'useOutput' => false,
            'fileName' => null,
            'delimiter' => null,
            'enclosure' => null,
            'escape' => null,
            'encoding' => null
        ], $options);

        // Prepare CSV
        $csv = CsvWriter::createFromStream(tmpfile());
        $csv->setOutputBOM(ByteSequence::BOM_UTF8);

        if ($options['delimiter'] !== null) {
            $csv->setDelimiter($options['delimiter']);
        }

        if ($options['enclosure'] !== null) {
            $csv->setEnclosure($options['enclosure']);
        }

        if ($options['escape'] !== null) {
            $csv->setEscape($options['escape']);
        }

        $encoder = (new CharsetConverter())->inputEncoding('UTF-8');

        if ($options['encoding'] !== null) {
            $encoder->outputEncoding($options['encoding']);
        }

        $csv->addFormatter($encoder);

        // Add headers
        if ($options['firstRowTitles']) {
            $headers = $this->getColumnHeaders($columns);
            $csv->insertOne($headers);
        }

        // Add records
        foreach ($results as $result) {
            $data = $this->matchDataToColumns($result, $columns);
            $csv->insertOne($data);
        }

        // Output
        if ($options['useOutput']) {
            $csv->output($options['fileName']);
            return;
        }

        // Save to file
        if ($path = $options['savePath']) {
            $resource = @fopen($path, 'w+');
            if (!is_resource($resource)) {
                throw new SystemException("{$path}: failed to open stream for export: No such file or directory.");
            }
            foreach ($csv->chunk(8192) as $chunk) {
                fwrite($resource, $chunk);
            }
            fclose($resource);
            return;
        }

        return $csv->toString();
    }

defaultFormatOptions:
    fileFormat: csv_custom
    delimiter: ';'
    enclosure: '"'
    escape: '\'
    encoding: 'utf-8'