RawDataParser->getXrefData not fully covered by tests

[LucianoHanna]

I had an Exception throw by RawDataParser->getXrefData, I didn't debug this case yet, but I noticed that there's an elseif not covered by tests...
I left a var_dump inside the elseif and I ran phpunit and this var_dump didn't show on terminal (I left a var_dump outside this elseif after just to be sure that would be shown on terminal)

This elseif is not covered (RawDataParser.php:822)

 elseif ($startxrefPreg) {
            // startxref found
            $startxref = $matches[1][0];
        }

PS: I will try to debug it later, I am just opening an issue for the record

[LucianoHanna]

On RawDataParser:822, $matches should be the value attributed by line 796 but on line 817 there's a preg_match that reassign the value of $matches

After I fixed it, I got a infinite loop between RawDataParser->decodeXref() and RawDataParser->getXrefData()

I don't know how to fix it

    protected function getXrefData($pdfData, $offset = 0, $xref = [])
    {
        $startxrefPreg = preg_match(
            '/[\r\n]startxref[\s]*[\r\n]+([0-9]+)[\s]*[\r\n]+%%EOF/i',
            $pdfData,
            $matches,
            \PREG_OFFSET_CAPTURE,
            $offset
        );

        if (0 == $offset) {
            // find last startxref
            $pregResult = preg_match_all(
                '/[\r\n]startxref[\s]*[\r\n]+([0-9]+)[\s]*[\r\n]+%%EOF/i',
                $pdfData, $matches,
                \PREG_SET_ORDER,
                $offset
            );
            if (0 == $pregResult) {
                throw new Exception('Unable to find startxref');
            }
            $matches = array_pop($matches);
            $startxref = $matches[1];
        } elseif (strpos($pdfData, 'xref', $offset) == $offset) {
            // Already pointing at the xref table
            $startxref = $offset;
        } elseif (preg_match('/([0-9]+[\s][0-9]+[\s]obj)/i', $pdfData, $matches, \PREG_OFFSET_CAPTURE, $offset)) {
            // Cross-Reference Stream object
            $startxref = $offset;
        } elseif ($startxrefPreg) {
            // startxref found
            $startxref = $matches[1][0];
        } else {
            throw new Exception('Unable to find startxref');
        }

[Connum]

After I fixed it, I got a infinite loop between RawDataParser->decodeXref() and RawDataParser->getXrefData()

this seems to be related to one of the memory leak issues outlined in #104