Program: 44653
Project: 44653
Buggy source:
public Node updateTopic(Session session,Topic topic,Node parentTopicJcrNode,Context context) throws RepositoryException {
  Node topicJcrNode=cmsRepositoryEntityUtils.retrieveUniqueNodeForTopic(session,topic.getId());
  if (topicJcrNode == null) {
    if (topic.getId() != null) {
      if (parentTopicJcrNode == null) {
        parentTopicJcrNode=retrieveParentTopicNode(session,topic);
      }
      return addNewTopicJcrNode(parentTopicJcrNode,topic,session,true,context);
    }
 else     throw new CmsException("String_Node_Str" + topic.getId());
  }
  updateSystemBuiltin(topic,topicJcrNode);
  updateOwner(topic,topicJcrNode,session,context);
  updateLocalizedLabels(topic,topicJcrNode);
  updateName(session,topic,topicJcrNode,context);
  Node currentTaxonomyNode=JcrNodeUtils.getTaxonomyJcrNode(topicJcrNode,true);
  String currentTaxonomyName=currentTaxonomyNode.getName();
  if (topic.getParent() != null) {
    updateTopicParent(currentTaxonomyName,topic,topicJcrNode,session,context);
  }
 else {
    if (topic.getTaxonomy() == null || (StringUtils.isBlank(topic.getTaxonomy().getId()) && StringUtils.isBlank(topic.getTaxonomy().getName()))) {
      if (!currentTaxonomyNode.isNodeType(CmsBuiltInItem.Taxonomy.getJcrName())) {
        throw new CmsException("String_Node_Str" + topic.getId() + "String_Node_Str"+ topic.getName()+ "String_Node_Str"+ topicJcrNode.getParent().getPath()+ "String_Node_Str");
      }
      checkThatReferrerContentObjectsAcceptNewTaxonomy(currentTaxonomyName,topic,session,currentTaxonomyName);
    }
 else {
      Node taxonomyNode=retrieveTaxonomyJcrNodeForTopic(session,topic);
      if (taxonomyNode == null) {
        throw new CmsException("String_Node_Str" + topic.getTaxonomy().getName());
      }
      if (!topicJcrNode.getParent().getUUID().equals(taxonomyNode.getUUID())) {
        checkThatReferrerContentObjectsAcceptNewTaxonomy(currentTaxonomyName,topic,session,topic.getTaxonomy().getName());
        session.move(topicJcrNode.getPath(),taxonomyNode.getPath() + CmsConstants.FORWARD_SLASH + topicJcrNode.getName());
      }
    }
  }
  updateOrder(topic,topicJcrNode);
  updateAllowsReferrerContentObject(topic,topicJcrNode);
  return topicJcrNode;
}

Fixed version (ground truth):
public Node updateTopic(Session session,Topic topic,Node parentTopicJcrNode,Context context) throws RepositoryException {
  Node topicJcrNode=context.retrieveNodeForTopic(topic.getId());
  if (topicJcrNode == null) {
    if (topic.getId() != null) {
      if (parentTopicJcrNode == null) {
        parentTopicJcrNode=retrieveParentTopicNode(session,topic,context);
      }
      return addNewTopicJcrNode(parentTopicJcrNode,topic,session,true,context);
    }
 else     throw new CmsException("String_Node_Str" + topic.getId());
  }
  updateSystemBuiltin(topic,topicJcrNode);
  updateOwner(topic,topicJcrNode,session,context);
  updateLocalizedLabels(topic,topicJcrNode);
  updateName(session,topic,topicJcrNode,context);
  Node currentTaxonomyNode=JcrNodeUtils.getTaxonomyJcrNode(topicJcrNode,true);
  String currentTaxonomyName=currentTaxonomyNode.getName();
  if (topic.getParent() != null) {
    updateTopicParent(currentTaxonomyName,topic,topicJcrNode,session,context);
  }
 else {
    if (topic.getTaxonomy() == null || (StringUtils.isBlank(topic.getTaxonomy().getId()) && StringUtils.isBlank(topic.getTaxonomy().getName()))) {
      if (!currentTaxonomyNode.isNodeType(CmsBuiltInItem.Taxonomy.getJcrName())) {
        throw new CmsException("String_Node_Str" + topic.getId() + "String_Node_Str"+ topic.getName()+ "String_Node_Str"+ topicJcrNode.getParent().getPath()+ "String_Node_Str");
      }
      checkThatReferrerContentObjectsAcceptNewTaxonomy(currentTaxonomyName,topic,session,currentTaxonomyName);
    }
 else {
      Node taxonomyNode=retrieveTaxonomyJcrNodeForTopic(session,topic);
      if (taxonomyNode == null) {
        throw new CmsException("String_Node_Str" + topic.getTaxonomy().getName());
      }
      if (!topicJcrNode.getParent().getUUID().equals(taxonomyNode.getUUID())) {
        checkThatReferrerContentObjectsAcceptNewTaxonomy(currentTaxonomyName,topic,session,topic.getTaxonomy().getName());
        session.move(topicJcrNode.getPath(),taxonomyNode.getPath() + CmsConstants.FORWARD_SLASH + topicJcrNode.getName());
      }
    }
  }
  updateOrder(topic,topicJcrNode);
  updateAllowsReferrerContentObject(topic,topicJcrNode);
  return topicJcrNode;
}