XMLReader bug

gistfile1.txt

<?php
//Bug in PHP 5.5 and PHP 5.6 with XMLReader and specialy crafted XML
TestXML('https://www.dropbox.com/s/6uzaf0mqlp8znk9/XMLReaderGood.xml?dl=1');
echo '<hr>';
//This will report "Input is not proper UTF-8, indicate encoding !", which is incorrect
TestXML('https://www.dropbox.com/s/nkphfqbotxaogw7/XMLReaderBad.xml?dl=1');

function TestXML($file) {
	$XR = new XMLReader;
	$XR->open($file, null, LIBXML_NOBLANKS);

	while (($lastRead = $XR->read()) && ($XR->name !== 'records')) { ; }
	while (($lastRead = $XR->read()) && ($XR->name !== 'record')) { ; }
	while ($lastRead) {
		$xml = $XR->readOuterXML();
		if ($xml === '') {
			$err = '';
			if ($e = libxml_get_last_error()) { $err = $e->message.' (line: '.$e->line.')'; }
			$XR->close();
			echo $file.' : Problem with file'.($err ? ' — '.$err : '').'.';
			return;
		}
		while (($lastRead = $XR->next()) && ($XR->name !== 'record')) { ; }
	}
	$XR->close();
	echo $file.' : Good!';
	return;
}
?>