Program: 99261
Project: 99261
Buggy source:
/** 
 * Given a date, create a new datespec + flags which represent the same options as requested by the WaybackRequest
 * @param timestamp the 14-digit timestamp to use
 * @return a String representing the flags on the WaybackRequest for thespecified date
 */
public static String getDateSpec(WaybackRequest wbRequest,String datespec){
  int dateLen=0;
  if (datespec != null) {
    dateLen=datespec.length();
  }
  StringBuilder sb=new StringBuilder(dateLen + 10);
  if (dateLen > 0) {
    sb.append(datespec);
  }
  if (wbRequest.isCSSContext()) {
    sb.append(ArchivalUrlRequestParser.CSS_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  if (wbRequest.isJSContext()) {
    sb.append(ArchivalUrlRequestParser.JS_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  if (wbRequest.isIMGContext()) {
    sb.append(ArchivalUrlRequestParser.IMG_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  if (wbRequest.isObjectEmbedContext()) {
    sb.append(ArchivalUrlRequestParser.OBJECT_EMBED_WRAPPED_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  if (wbRequest.isIdentityContext()) {
    sb.append(ArchivalUrlRequestParser.IDENTITY_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  if (wbRequest.isIFrameWrapperContext()) {
    sb.append(ArchivalUrlRequestParser.IFRAME_WRAPPED_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  if (wbRequest.isFrameWrapperContext()) {
    sb.append(ArchivalUrlRequestParser.FRAME_WRAPPED_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  return sb.toString();
}

Fixed version (ground truth):
/** 
 * Given a date, create a new datespec + flags which represent the same options as requested by the WaybackRequest
 * @param wbRequest
 * @param datespec The date specification prefix.
 * @return a String representing the flags on the WaybackRequest for thespecified date
 */
public static String getDateSpec(WaybackRequest wbRequest,String datespec){
  int dateLen=0;
  if (datespec != null) {
    dateLen=datespec.length();
  }
  StringBuilder sb=new StringBuilder(dateLen + 10);
  if (dateLen > 0) {
    sb.append(datespec);
  }
  if (wbRequest.isCSSContext()) {
    sb.append(ArchivalUrlRequestParser.CSS_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  if (wbRequest.isJSContext()) {
    sb.append(ArchivalUrlRequestParser.JS_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  if (wbRequest.isIMGContext()) {
    sb.append(ArchivalUrlRequestParser.IMG_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  if (wbRequest.isObjectEmbedContext()) {
    sb.append(ArchivalUrlRequestParser.OBJECT_EMBED_WRAPPED_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  if (wbRequest.isIdentityContext()) {
    sb.append(ArchivalUrlRequestParser.IDENTITY_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  if (wbRequest.isIFrameWrapperContext()) {
    sb.append(ArchivalUrlRequestParser.IFRAME_WRAPPED_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  if (wbRequest.isFrameWrapperContext()) {
    sb.append(ArchivalUrlRequestParser.FRAME_WRAPPED_CONTEXT);
    sb.append(ArchivalUrlRequestParser.FLAG_DELIM);
    dateLen++;
  }
  return sb.toString();
}