Program: 154159
Project: 154159
Buggy source:
/** 
 * @param action
 * @param target
 * @param targetRootStr
 * @param targetPrefixStr prefix for new nodes in target - if this prefix equals the prefix of a term's ID, don't generate a new ID for the term copy
 */
private void processAttachAction(Node action,TaxonStore target,String targetRootStr,String targetPrefixStr){
  @SuppressWarnings("String_Node_Str") List<String> columns=(List<String>)Collections.EMPTY_LIST;
  Map<Integer,String> synPrefixes=new HashMap<Integer,String>();
  final String formatStr=getAttribute(action,ATTACHFORMATSTR);
  final String cladeRootStr=getAttribute(action,ATTACHROOTSTR);
  final String sourceParentStr=getAttribute(action,ATTACHPARENTSTR);
  final String sourcePrefixStr=getAttribute(action,ATTACHPREFIXSTR);
  NodeList childNodes=action.getChildNodes();
  if (childNodes.getLength() > 0) {
    columns=processChildNodesOfAttach(childNodes,synPrefixes);
  }
  Merger m=getMerger(formatStr,columns,synPrefixes);
  if (!m.canAttach()) {
    throw new RuntimeException("String_Node_Str" + formatStr + "String_Node_Str");
  }
  if (!m.canPreserveID() && (sourcePrefixStr != null) && (!sourcePrefixStr.equals(targetPrefixStr))) {
    throw new RuntimeException("String_Node_Str" + formatStr + "String_Node_Str");
  }
  String sourceURLStr=action.getAttributes().getNamedItem("String_Node_Str").getNodeValue();
  File sourceFile=getSourceFile(sourceURLStr);
  logger.info("String_Node_Str" + sourceURLStr);
  if (targetPrefixStr == null) {
    logger.warn("String_Node_Str");
    targetPrefixStr=sourceFile.getName();
  }
  m.setSource(sourceFile);
  m.setTarget(target);
  if (sourceParentStr != null) {
    if (cladeRootStr != null)     m.attach(sourceParentStr,cladeRootStr,targetPrefixStr);
 else     m.attach(sourceParentStr,sourceParentStr,targetPrefixStr);
  }
 else {
    if (cladeRootStr != null)     m.attach(targetRootStr,cladeRootStr,targetPrefixStr);
 else     m.attach(targetRootStr,targetRootStr,targetPrefixStr);
  }
}

Fixed version (ground truth):
/** 
 * @param action
 * @param target
 * @param targetRootStr
 * @param targetPrefixStr prefix for new nodes in target - if this prefix equals the prefix of a term's ID, don't generate a new ID for the term copy
 */
private void processAttachAction(Node action,TaxonStore target,String targetRootStr,String targetPrefixStr){
  @SuppressWarnings("String_Node_Str") List<String> columns=(List<String>)Collections.EMPTY_LIST;
  Map<Integer,String> synPrefixes=new HashMap<Integer,String>();
  final String formatStr=getAttribute(action,ATTACHFORMATSTR);
  final String cladeRootStr=getAttribute(action,ATTACHROOTSTR);
  final String sourceParentStr=getAttribute(action,ATTACHPARENTSTR);
  final String sourcePrefixStr=getAttribute(action,ATTACHPREFIXSTR);
  NodeList childNodes=action.getChildNodes();
  if (childNodes.getLength() > 0) {
    columns=processChildNodesOfAttach(childNodes,synPrefixes);
  }
  Merger m=getMerger(formatStr,columns,synPrefixes);
  if (!m.canAttach()) {
    throw new RuntimeException("String_Node_Str" + formatStr + "String_Node_Str");
  }
  if (!m.canPreserveID() && (sourcePrefixStr != null) && (!sourcePrefixStr.equals(targetPrefixStr))) {
    throw new RuntimeException("String_Node_Str" + formatStr + "String_Node_Str");
  }
  String sourceURLStr=action.getAttributes().getNamedItem("String_Node_Str").getNodeValue();
  File sourceFile=getSourceFile(sourceURLStr);
  logger.info("String_Node_Str" + sourceURLStr);
  if (targetPrefixStr == null) {
    logger.warn("String_Node_Str");
    targetPrefixStr=sourceFile.getName();
  }
  m.setSource(sourceFile);
  m.setTarget(target);
  if (sourceParentStr != null) {
    if (cladeRootStr != null)     m.attach(sourceParentStr,cladeRootStr,sourcePrefixStr);
 else     m.attach(sourceParentStr,sourceParentStr,sourcePrefixStr);
  }
 else {
    if (cladeRootStr != null)     m.attach(targetRootStr,cladeRootStr,sourcePrefixStr);
 else     m.attach(targetRootStr,targetRootStr,sourcePrefixStr);
  }
}