Program: 68824
Project: 68824
Buggy source:
public boolean marshal(XPathFragment xPathFragment,MarshalRecord marshalRecord,Object object,AbstractSession session,NamespaceResolver namespaceResolver,XMLMarshaller marshaller){
  if (xmlCompositeObjectMapping.isReadOnly()) {
    return false;
  }
  if (xPathFragment.hasLeafElementType()) {
    marshalRecord.setLeafElementType(xPathFragment.getLeafElementType());
  }
  Object objectValue=xmlCompositeObjectMapping.getAttributeValueFromObject(object);
  if (xmlCompositeObjectMapping.getConverter() != null) {
    Converter converter=xmlCompositeObjectMapping.getConverter();
    if (converter instanceof XMLConverter) {
      objectValue=((XMLConverter)converter).convertObjectValueToDataValue(objectValue,session,marshaller);
    }
 else {
      objectValue=converter.convertObjectValueToDataValue(objectValue,session);
    }
  }
  if (null == objectValue) {
    return xmlCompositeObjectMapping.getNullPolicy().compositeObjectMarshal(xPathFragment,marshalRecord,object,session,namespaceResolver);
  }
  if ((marshaller != null) && (marshaller.getMarshalListener() != null)) {
    marshaller.getMarshalListener().beforeMarshal(objectValue);
  }
  XPathFragment groupingFragment=marshalRecord.openStartGroupingElements(namespaceResolver);
  marshalRecord.closeStartGroupingElements(groupingFragment);
  XMLDescriptor descriptor=(XMLDescriptor)session.getDescriptor(objectValue);
  TreeObjectBuilder objectBuilder=(TreeObjectBuilder)descriptor.getObjectBuilder();
  if (xPathFragment.isSelfFragment()) {
    objectBuilder.marshalAttributes(marshalRecord,objectValue,(org.eclipse.persistence.internal.sessions.AbstractSession)session);
  }
 else {
    getXPathNode().startElement(marshalRecord,xPathFragment,object,session,namespaceResolver,objectBuilder,objectValue);
  }
  List extraNamespaces=objectBuilder.addExtraNamespacesToNamespaceResolver(descriptor,marshalRecord,session);
  writeExtraNamespaces(extraNamespaces,marshalRecord,session);
  if ((xmlCompositeObjectMapping.getReferenceDescriptor() == null) && (descriptor.getSchemaReference() != null)) {
    addTypeAttributeIfNeeded(descriptor,xmlCompositeObjectMapping,marshalRecord);
  }
  objectBuilder.buildRow(marshalRecord,objectValue,(org.eclipse.persistence.internal.sessions.AbstractSession)session,marshaller);
  if (!xPathFragment.isSelfFragment()) {
    marshalRecord.endElement(xPathFragment,namespaceResolver);
  }
  objectBuilder.removeExtraNamespacesFromNamespaceResolver(marshalRecord,extraNamespaces,session);
  if ((marshaller != null) && (marshaller.getMarshalListener() != null)) {
    marshaller.getMarshalListener().afterMarshal(objectValue);
  }
  return true;
}

Fixed version (ground truth):
public boolean marshal(XPathFragment xPathFragment,MarshalRecord marshalRecord,Object object,AbstractSession session,NamespaceResolver namespaceResolver,XMLMarshaller marshaller){
  if (xmlCompositeObjectMapping.isReadOnly()) {
    return false;
  }
  if (xPathFragment.hasLeafElementType()) {
    marshalRecord.setLeafElementType(xPathFragment.getLeafElementType());
  }
  Object objectValue=xmlCompositeObjectMapping.getAttributeValueFromObject(object);
  if (xmlCompositeObjectMapping.getConverter() != null) {
    Converter converter=xmlCompositeObjectMapping.getConverter();
    if (converter instanceof XMLConverter) {
      objectValue=((XMLConverter)converter).convertObjectValueToDataValue(objectValue,session,marshaller);
    }
 else {
      objectValue=converter.convertObjectValueToDataValue(objectValue,session);
    }
  }
  if (null == objectValue) {
    return xmlCompositeObjectMapping.getNullPolicy().compositeObjectMarshal(xPathFragment,marshalRecord,object,session,namespaceResolver);
  }
  if ((marshaller != null) && (marshaller.getMarshalListener() != null)) {
    marshaller.getMarshalListener().beforeMarshal(objectValue);
  }
  XPathFragment groupingFragment=marshalRecord.openStartGroupingElements(namespaceResolver);
  marshalRecord.closeStartGroupingElements(groupingFragment);
  XMLDescriptor descriptor=(XMLDescriptor)session.getDescriptor(objectValue);
  TreeObjectBuilder objectBuilder=(TreeObjectBuilder)descriptor.getObjectBuilder();
  if (!xPathFragment.isSelfFragment()) {
    getXPathNode().startElement(marshalRecord,xPathFragment,object,session,namespaceResolver,objectBuilder,objectValue);
  }
  List extraNamespaces=objectBuilder.addExtraNamespacesToNamespaceResolver(descriptor,marshalRecord,session);
  writeExtraNamespaces(extraNamespaces,marshalRecord,session);
  if ((xmlCompositeObjectMapping.getReferenceDescriptor() == null) && (descriptor.getSchemaReference() != null)) {
    addTypeAttributeIfNeeded(descriptor,xmlCompositeObjectMapping,marshalRecord);
  }
  objectBuilder.buildRow(marshalRecord,objectValue,(org.eclipse.persistence.internal.sessions.AbstractSession)session,marshaller);
  if (!xPathFragment.isSelfFragment()) {
    marshalRecord.endElement(xPathFragment,namespaceResolver);
  }
  objectBuilder.removeExtraNamespacesFromNamespaceResolver(marshalRecord,extraNamespaces,session);
  if ((marshaller != null) && (marshaller.getMarshalListener() != null)) {
    marshaller.getMarshalListener().afterMarshal(objectValue);
  }
  return true;
}