Program: 12328
Project: 12328
Buggy source:
private static Set<Downloadable> getAssets(File baseDirectory){
  Set<Downloadable> assets=new HashSet<Downloadable>();
  try {
    URL resourceUrl=new URL("String_Node_Str");
    DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
    DocumentBuilder db=dbf.newDocumentBuilder();
    Document doc=db.parse(resourceUrl.openConnection().getInputStream());
    NodeList nodes=doc.getElementsByTagName("String_Node_Str");
    for (int i=0; i < nodes.getLength(); i++) {
      Node node=nodes.item(i);
      if (node.getNodeType() == 1) {
        Element element=(Element)node;
        String key=getNodeValue(element,"String_Node_Str");
        String etag=element.getElementsByTagName("String_Node_Str") != null ? getNodeValue(element,"String_Node_Str") : "String_Node_Str";
        long size=Long.parseLong(getNodeValue(element,"String_Node_Str"));
        if (size > 0L) {
          File file=new File(baseDirectory,key);
          if (etag.length() > 1) {
            etag=scrubEtag(etag);
            if ((file.isFile()) && (file.length() == size)) {
              String localMD5=Downloadable.getMD5(file);
              if (localMD5.equals(etag))               continue;
            }
          }
          List<URL> urls=new ArrayList<URL>();
          urls.add(new URL(resourceUrl + key));
          Downloadable download=new Downloadable(key,key,etag,size,urls);
          assets.add(download);
        }
      }
    }
  }
 catch (  Exception e) {
  }
  return assets;
}

Fixed version (ground truth):
private static Set<Downloadable> getAssets(File baseDirectory){
  Set<Downloadable> assets=new HashSet<Downloadable>();
  try {
    URL resourceUrl=new URL("String_Node_Str");
    URL localUrl=MCUpdater.getInstance().getMCFolder().resolve("String_Node_Str").toFile().toURI().toURL();
    DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
    DocumentBuilder db=dbf.newDocumentBuilder();
    Document doc=db.parse(resourceUrl.openConnection().getInputStream());
    NodeList nodes=doc.getElementsByTagName("String_Node_Str");
    for (int i=0; i < nodes.getLength(); i++) {
      Node node=nodes.item(i);
      if (node.getNodeType() == 1) {
        Element element=(Element)node;
        String key=getNodeValue(element,"String_Node_Str");
        String etag=element.getElementsByTagName("String_Node_Str") != null ? getNodeValue(element,"String_Node_Str") : "String_Node_Str";
        long size=Long.parseLong(getNodeValue(element,"String_Node_Str"));
        if (size > 0L) {
          File file=new File(baseDirectory,key);
          if (etag.length() > 1) {
            etag=scrubEtag(etag);
            if ((file.isFile()) && (file.length() == size)) {
              String localMD5=Downloadable.getMD5(file);
              if (localMD5.equals(etag))               continue;
            }
          }
          List<URL> urls=new ArrayList<URL>();
          urls.add(new URL(localUrl + key));
          urls.add(new URL(resourceUrl + key));
          Downloadable download=new Downloadable(key,key,etag,size,urls);
          assets.add(download);
        }
      }
    }
  }
 catch (  Exception e) {
  }
  return assets;
}