Description:
------------
Using disable-output-escaping XSLT instruction attribute with "yes" value causes Segmentation fault.

Reproduce code:
---------------
$stylesheetDocument = new DOMDocument();
$stylesheetDocument->load( 'php5test.xslt' ) || die('Unable to open stylesheet');
$inputDocument = new DOMDocument();
$inputDocument->loadXML( '<?xml version="1.0"?><root/>' );
$xsltProcessor = new XSLTProcessor();
$xsltProcessor->importStylesheet( $stylesheetDocument );
$outputDocument = $xsltProcessor->transformToDoc( $inputDocument, true );
php5test.xslt:
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<xsl:text disable-output-escaping="yes"><![CDATA[]]></xsl:text>
</xsl:template>
</xsl:stylesheet>

Expected result:
----------------
Segmentation fault.

Actual result:
--------------
For example: child pid 31708 exit signal Segmentation fault (11)