Program: 67664
Project: 67664
Buggy source:
public boolean startElement(XPathFragment xPathFragment,UnmarshalRecord unmarshalRecord,Attributes atts){
  try {
    XMLContext xmlContext=unmarshalRecord.getUnmarshaller().getXMLContext();
    XMLDescriptor xmlDescriptor=null;
    if (xmlAnyObjectMapping.usesXMLRoot()) {
      String schemaType=atts.getValue(XMLConstants.SCHEMA_INSTANCE_URL,XMLConstants.SCHEMA_TYPE_ATTRIBUTE);
      XPathFragment frag=new XPathFragment();
      if ((null != schemaType) && (!schemaType.equals("String_Node_Str"))) {
        frag.setXPath(schemaType);
        if (frag.hasNamespace()) {
          String prefix=frag.getPrefix();
          String url=unmarshalRecord.resolveNamespacePrefix(prefix);
          frag.setNamespaceURI(url);
          QName qname=new QName(url,frag.getLocalName());
          unmarshalRecord.setTypeQName(qname);
        }
        xmlDescriptor=xmlContext.getDescriptorByGlobalType(frag);
      }
    }
    if (xmlDescriptor == null) {
      QName qname=new QName(xPathFragment.getNamespaceURI(),xPathFragment.getLocalName());
      xmlDescriptor=xmlContext.getDescriptor(qname);
    }
    workingDescriptor=xmlDescriptor;
    UnmarshalKeepAsElementPolicy policy=xmlAnyObjectMapping.getKeepAsElementPolicy();
    if (((xmlDescriptor == null) && (policy == UnmarshalKeepAsElementPolicy.KEEP_UNKNOWN_AS_ELEMENT)) || (policy == UnmarshalKeepAsElementPolicy.KEEP_ALL_AS_ELEMENT)) {
      SAXFragmentBuilder builder=unmarshalRecord.getFragmentBuilder();
      builder.setOwningRecord(unmarshalRecord);
      try {
        String namespaceURI="String_Node_Str";
        if (xPathFragment.getNamespaceURI() != null) {
          namespaceURI=xPathFragment.getNamespaceURI();
        }
        String qName=xPathFragment.getLocalName();
        if (xPathFragment.getPrefix() != null) {
          qName=xPathFragment.getPrefix() + "String_Node_Str" + qName;
        }
        builder.startElement(namespaceURI,xPathFragment.getLocalName(),qName,atts);
        unmarshalRecord.getXMLReader().setContentHandler(builder);
      }
 catch (      SAXException ex) {
      }
    }
    if (null == xmlDescriptor) {
      AnyMappingContentHandler handler=new AnyMappingContentHandler(unmarshalRecord,xmlAnyObjectMapping.usesXMLRoot());
      String qnameString=xPathFragment.getLocalName();
      if (xPathFragment.getPrefix() != null) {
        qnameString=xPathFragment.getPrefix() + "String_Node_Str" + qnameString;
      }
      handler.startElement(xPathFragment.getNamespaceURI(),xPathFragment.getLocalName(),qnameString,atts);
      unmarshalRecord.getXMLReader().setContentHandler(handler);
      return true;
    }
    processChild(xPathFragment,unmarshalRecord,atts,xmlDescriptor);
  }
 catch (  SAXException e) {
    throw XMLMarshalException.unmarshalException(e);
  }
  return true;
}

Fixed version (ground truth):
public boolean startElement(XPathFragment xPathFragment,UnmarshalRecord unmarshalRecord,Attributes atts){
  try {
    XMLContext xmlContext=unmarshalRecord.getUnmarshaller().getXMLContext();
    XMLDescriptor xmlDescriptor=null;
    if (xmlAnyObjectMapping.usesXMLRoot()) {
      String schemaType=atts.getValue(XMLConstants.SCHEMA_INSTANCE_URL,XMLConstants.SCHEMA_TYPE_ATTRIBUTE);
      XPathFragment frag=new XPathFragment();
      if ((null != schemaType) && (!schemaType.equals("String_Node_Str"))) {
        frag.setXPath(schemaType);
        if (frag.hasNamespace()) {
          String prefix=frag.getPrefix();
          String url=unmarshalRecord.resolveNamespacePrefix(prefix);
          frag.setNamespaceURI(url);
          QName qname=new QName(url,frag.getLocalName());
          unmarshalRecord.setTypeQName(qname);
        }
        xmlDescriptor=xmlContext.getDescriptorByGlobalType(frag);
      }
    }
    if (xmlDescriptor == null) {
      QName qname=new QName(xPathFragment.getNamespaceURI(),xPathFragment.getLocalName());
      xmlDescriptor=xmlContext.getDescriptor(qname);
    }
    workingDescriptor=xmlDescriptor;
    UnmarshalKeepAsElementPolicy policy=xmlAnyObjectMapping.getKeepAsElementPolicy();
    if (((xmlDescriptor == null) && (policy == UnmarshalKeepAsElementPolicy.KEEP_UNKNOWN_AS_ELEMENT)) || (policy == UnmarshalKeepAsElementPolicy.KEEP_ALL_AS_ELEMENT)) {
      SAXFragmentBuilder builder=unmarshalRecord.getFragmentBuilder();
      builder.setOwningRecord(unmarshalRecord);
      try {
        String namespaceURI="String_Node_Str";
        if (xPathFragment.getNamespaceURI() != null) {
          namespaceURI=xPathFragment.getNamespaceURI();
        }
        String qName=xPathFragment.getLocalName();
        if (xPathFragment.getPrefix() != null) {
          qName=xPathFragment.getPrefix() + "String_Node_Str" + qName;
        }
        builder.startElement(namespaceURI,xPathFragment.getLocalName(),qName,atts);
        unmarshalRecord.getXMLReader().setContentHandler(builder);
      }
 catch (      SAXException ex) {
      }
    }
 else     if (xmlDescriptor != null) {
      processChild(xPathFragment,unmarshalRecord,atts,xmlDescriptor);
    }
 else {
      AnyMappingContentHandler handler=new AnyMappingContentHandler(unmarshalRecord,xmlAnyObjectMapping.usesXMLRoot());
      String qnameString=xPathFragment.getLocalName();
      if (xPathFragment.getPrefix() != null) {
        qnameString=xPathFragment.getPrefix() + "String_Node_Str" + qnameString;
      }
      handler.startElement(xPathFragment.getNamespaceURI(),xPathFragment.getLocalName(),qnameString,atts);
      unmarshalRecord.getXMLReader().setContentHandler(handler);
      return true;
    }
  }
 catch (  SAXException e) {
    throw XMLMarshalException.unmarshalException(e);
  }
  return true;
}