DO NOT REPLY [Bug 24974] New: - XalanDocument return by parseXMLString doesn't work correctly

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=24974

XalanDocument return by parseXMLString doesn't work correctly

           Summary: XalanDocument return by parseXMLString doesn't work
                    correctly
           Product: XalanC
           Version: 1.2.x
          Platform: Sun
        OS/Version: Solaris
            Status: NEW
          Severity: Critical
          Priority: Other
         Component: XalanC
        AssignedTo: xalan-dev@xml.apache.org
        ReportedBy: honglianglu@hotmail.com


I'm trying to write an extension function of Xalan. This function should parse 
in a XML string in memory and return them as NodeSet as following:

const char* xml="...."; // the xml string in memory
MemBufInputSource * source = new MemBufInputSource((const XMLByte*)xml,strlen
(xml), "foo", false);
XalanSourceTreeDOMSupport	aDOMSupport;
XalanSourceTreeParserLiaison aLiaison(aDOMSupport);
aDOMSupport.setParserLiaison(&aLiaison);
XalanDocument * aXalanDoc = aLiaison.parseXMLStream(*source);
XPathExecutionContext::BorrowReturnMutableNodeRefList mnl(executionContext);
mnl->addNodeInDocOrder((XalanNode*)aXalanDoc, executionContext);
return executionContext.getXObjectFactory().createNodeSet(mnl);

As long as i user the NodeSet returned from this function to evaluate a XPath 
expression, it crashs.

But if i write the XML string at first in a file and then user fuction parseXML 
of executionContext as following:

const char* xml="...."; // the xml string in memory
// stream out this string into file called "test.xml"
XalanDOMString * xx = new XalanDOMString("test.xml");
XalanDocument * const aXalanDoc = executionContext.parseXML(*xx, XalanDOMString
(""));
XPathExecutionContext::BorrowReturnMutableNodeRefList mnl(executionContext);
mnl->addNodeInDocOrder((XalanNode*)aXalanDoc, executionContext);
return executionContext.getXObjectFactory().createNodeSet(mnl);

It works then. Can anyone tell me why? Bug by function parseXMLStream????