Program: 90192
Project: 90192
Buggy source:
/** 
 * Parse a crawl.log line into a valid CrawlDataItem. If CrawlLogIterator is ok with this line, we must make sure that it has an origin by finding missing ones in the CDX file. If multiple origins are found in the CDX files, the one that was harvested last is chosen. If no origin can be found, the item is rejected. We assume that super.parseLine() delivers us the items in the crawl.log in the given (sorted) order with non-null URLs, though we admit that some undeclared exceptions can be thrown by it.
 * @param line A crawl.log line to parse.
 * @return A CrawlDataItem with a valid origin field, or null if we couldnot determine an appropriate origin.
 * @throws IOFailure if there is an error reading the files.
 */
protected CrawlDataItem parseLine(String line){
  CrawlDataItem item;
  log.trace("String_Node_Str" + line);
  try {
    item=super.parseLine(line);
  }
 catch (  RuntimeException e) {
    log.debug("String_Node_Str" + line + "String_Node_Str",e);
    return null;
  }
  if (item != null && item.getContentDigest() != null) {
    if (item.getContentDigest().toLowerCase().startsWith(SHA1_PREFIX)) {
      item.setContentDigest(item.getContentDigest().substring(SHA1_PREFIX.length()));
    }
  }
  if (item != null && item.getOrigin() == null) {
    CDXRecord foundRecord=null;
    while (lastRecord == null || lastRecord.getURL().compareTo(item.getURL()) <= 0) {
      if (lastRecord != null && lastRecord.getURL().equals(item.getURL())) {
        if (foundRecord == null || lastRecord.getArcfile().compareTo(foundRecord.getArcfile()) > 0 || (lastRecord.getArcfile().equals(foundRecord.getArcfile())) && (lastRecord.getOffset() > foundRecord.getOffset())) {
          foundRecord=lastRecord;
          log.trace("String_Node_Str" + foundRecord.getArcfile() + "String_Node_Str"+ foundRecord.getOffset()+ "String_Node_Str");
        }
      }
      try {
        String record=reader.readLine();
        if (record == null) {
          break;
        }
        if (record.length() == 0) {
          continue;
        }
        try {
          lastRecord=new CDXRecord(record);
        }
 catch (        ArgumentNotValid e) {
          log.debug("String_Node_Str" + record + "String_Node_Str",e);
          continue;
        }
        log.trace("String_Node_Str" + record + "String_Node_Str");
      }
 catch (      IOException e) {
        throw new IOFailure("String_Node_Str",e);
      }
    }
    if (foundRecord == null) {
      log.debug("String_Node_Str" + item.getURL() + "String_Node_Str"+ (lastRecord == null ? "String_Node_Str" : lastRecord.getURL())+ "String_Node_Str");
      return null;
    }
    String origin=foundRecord.getArcfile() + "String_Node_Str" + foundRecord.getOffset();
    item.setOrigin(origin);
    log.debug("String_Node_Str" + item.getURL() + "String_Node_Str"+ origin+ "String_Node_Str");
  }
  return item;
}

Fixed version (ground truth):
/** 
 * Parse a crawl.log line into a valid CrawlDataItem. If CrawlLogIterator is ok with this line, we must make sure that it has an origin by finding missing ones in the CDX file. If multiple origins are found in the CDX files, the one that was harvested last is chosen. If no origin can be found, the item is rejected. We assume that super.parseLine() delivers us the items in the crawl.log in the given (sorted) order with non-null URLs, though we admit that some undeclared exceptions can be thrown by it.
 * @param line A crawl.log line to parse.
 * @return A CrawlDataItem with a valid origin field, or null if we couldnot determine an appropriate origin.
 * @throws IOFailure if there is an error reading the files.
 */
protected CrawlDataItem parseLine(String line){
  CrawlDataItem item;
  log.trace("String_Node_Str" + line);
  try {
    item=super.parseLine(line);
  }
 catch (  RuntimeException e) {
    log.debug("String_Node_Str" + line + "String_Node_Str",e);
    return null;
  }
  if (item != null && item.getContentDigest() != null) {
    if (item.getContentDigest().toLowerCase().startsWith(SHA1_PREFIX)) {
      item.setContentDigest(item.getContentDigest().substring(SHA1_PREFIX.length()));
    }
  }
  if (item != null && item.getOrigin() == null) {
    CDXRecord foundRecord=null;
    while (lastRecord == null || lastRecord.getURL().compareTo(item.getURL()) <= 0) {
      if (lastRecord != null && lastRecord.getURL().equals(item.getURL())) {
        if (foundRecord == null || lastRecord.getDate().compareTo(foundRecord.getDate()) > 0) {
          foundRecord=lastRecord;
          log.trace("String_Node_Str" + foundRecord.getArcfile() + "String_Node_Str"+ foundRecord.getOffset()+ "String_Node_Str");
        }
      }
      try {
        String record=reader.readLine();
        if (record == null) {
          break;
        }
        if (record.length() == 0) {
          continue;
        }
        try {
          lastRecord=new CDXRecord(record);
        }
 catch (        ArgumentNotValid e) {
          log.debug("String_Node_Str" + record + "String_Node_Str",e);
          continue;
        }
        log.trace("String_Node_Str" + record + "String_Node_Str");
      }
 catch (      IOException e) {
        throw new IOFailure("String_Node_Str",e);
      }
    }
    if (foundRecord == null) {
      log.debug("String_Node_Str" + item.getURL() + "String_Node_Str"+ (lastRecord == null ? "String_Node_Str" : lastRecord.getURL())+ "String_Node_Str");
      return null;
    }
    String origin=foundRecord.getArcfile() + "String_Node_Str" + foundRecord.getOffset();
    item.setOrigin(origin);
    log.debug("String_Node_Str" + item.getURL() + "String_Node_Str"+ origin+ "String_Node_Str");
  }
  return item;
}