Program: 66032
Project: 66032
Buggy source:
/** 
 * INTERNAL:  When using the SAX or DOM Platform, this method is responsible for marshalling null values for the XML Direct Mapping.
 * @param xPathFragment
 * @param marshalRecord
 * @param object
 * @param session
 * @param namespaceResolver
 * @return true if this method caused any nodes to be marshaled, else false.
 */
public boolean directMarshal(XPathFragment xPathFragment,MarshalRecord marshalRecord,Object object,Session session,NamespaceResolver namespaceResolver){
  if (xPathFragment.isAttribute()) {
    if (getMarshalNullRepresentation().equals(XMLNullRepresentationType.EMPTY_NODE)) {
      XPathFragment groupingFragment=marshalRecord.openStartGroupingElements(namespaceResolver);
      marshalRecord.attribute(xPathFragment,namespaceResolver,XMLConstants.EMPTY_STRING);
      marshalRecord.closeStartGroupingElements(groupingFragment);
      return true;
    }
 else {
      return false;
    }
  }
 else {
    if (getMarshalNullRepresentation().equals(XMLNullRepresentationType.XSI_NIL)) {
      String xsiPrefix=processNamespaceResolverForXSIPrefix(namespaceResolver);
      StringBuilder qName=new StringBuilder(XMLConstants.ATTRIBUTE);
      qName.append(xsiPrefix).append(COLON_W_SCHEMA_NIL_ATTRIBUTE);
      XPathFragment nilFragment=new XPathFragment(qName.toString());
      nilFragment.setNamespaceURI(XMLConstants.SCHEMA_INSTANCE_URL);
      XPathFragment groupingFragment=marshalRecord.openStartGroupingElements(namespaceResolver);
      marshalRecord.attribute(nilFragment,namespaceResolver,TRUE);
      marshalRecord.closeStartGroupingElements(groupingFragment);
      return true;
    }
 else {
      if (getMarshalNullRepresentation().equals(XMLNullRepresentationType.EMPTY_NODE)) {
        XPathFragment groupingFragment=marshalRecord.openStartGroupingElements(namespaceResolver);
        marshalRecord.closeStartGroupingElements(groupingFragment);
        return true;
      }
 else {
        return false;
      }
    }
  }
}

Fixed version (ground truth):
/** 
 * INTERNAL:  When using the SAX or DOM Platform, this method is responsible for marshalling null values for the XML Direct Mapping.
 * @param xPathFragment
 * @param marshalRecord
 * @param object
 * @param session
 * @param namespaceResolver
 * @return true if this method caused any nodes to be marshaled, else false.
 */
public boolean directMarshal(XPathFragment xPathFragment,MarshalRecord marshalRecord,Object object,Session session,NamespaceResolver namespaceResolver){
  if (xPathFragment.isAttribute()) {
    if (getMarshalNullRepresentation().equals(XMLNullRepresentationType.EMPTY_NODE)) {
      XPathFragment groupingFragment=marshalRecord.openStartGroupingElements(namespaceResolver);
      marshalRecord.attribute(xPathFragment,namespaceResolver,XMLConstants.EMPTY_STRING);
      marshalRecord.closeStartGroupingElements(groupingFragment);
      return true;
    }
 else {
      return false;
    }
  }
 else {
    if (getMarshalNullRepresentation().equals(XMLNullRepresentationType.XSI_NIL)) {
      XPathFragment groupingFragment=marshalRecord.openStartGroupingElements(namespaceResolver);
      String xsiPrefix=processNamespaceResolverForXSIPrefix(namespaceResolver,marshalRecord);
      StringBuilder qName=new StringBuilder(XMLConstants.ATTRIBUTE);
      qName.append(xsiPrefix).append(COLON_W_SCHEMA_NIL_ATTRIBUTE);
      XPathFragment nilFragment=new XPathFragment(qName.toString());
      nilFragment.setNamespaceURI(XMLConstants.SCHEMA_INSTANCE_URL);
      marshalRecord.attribute(nilFragment,namespaceResolver,TRUE);
      marshalRecord.closeStartGroupingElements(groupingFragment);
      return true;
    }
 else {
      if (getMarshalNullRepresentation().equals(XMLNullRepresentationType.EMPTY_NODE)) {
        XPathFragment groupingFragment=marshalRecord.openStartGroupingElements(namespaceResolver);
        marshalRecord.closeStartGroupingElements(groupingFragment);
        return true;
      }
 else {
        return false;
      }
    }
  }
}