Program: 52691
Project: 52691
Buggy source:
@Override public boolean updateLatestQuotes(Security security,List<Exception> errors){
  if (apiKey == null)   throw new IllegalArgumentException(Messages.MsgAlphaVantageAPIKeyMissing);
  String wknUrl=MessageFormat.format("String_Node_Str" + "String_Node_Str",security.getTickerSymbol(),apiKey);
  try {
    URL obj=new URL(wknUrl);
    HttpURLConnection con=(HttpURLConnection)obj.openConnection();
    con.setConnectTimeout(1000);
    con.setReadTimeout(20000);
    int responseCode=con.getResponseCode();
    if (responseCode != HttpURLConnection.HTTP_OK)     throw new IOException(wknUrl + "String_Node_Str" + responseCode);
    try (Scanner scanner=new Scanner(con.getInputStream(),StandardCharsets.UTF_8.name())){
      String body=scanner.useDelimiter("String_Node_Str").next();
      String[] lines=body.split("String_Node_Str");
      if (lines.length <= 2)       return false;
      if (!"String_Node_Str".equals(lines[0])) {
        errors.add(new IOException(MessageFormat.format(Messages.MsgUnexpectedHeader,body)));
        return false;
      }
      String line=lines[1];
      String[] values=line.split("String_Node_Str");
      if (values.length != 6)       throw new IOException(MessageFormat.format(Messages.MsgUnexpectedValue,line));
      DateTimeFormatter formatter=DateTimeFormatter.ofPattern("String_Node_Str");
      LatestSecurityPrice price=new LatestSecurityPrice();
      price.setTime(LocalDate.parse(values[0],formatter));
      price.setValue(asPrice(values[4]));
      price.setHigh(asPrice(values[2]));
      price.setLow(asPrice(values[3]));
      price.setVolume(Long.parseLong(values[5]));
      price.setPreviousClose(LatestSecurityPrice.NOT_AVAILABLE);
      security.setLatest(price);
      return true;
    }
   }
 catch (  IOException|ParseException e) {
    errors.add(e);
    return false;
  }
}

Fixed version (ground truth):
@Override public boolean updateLatestQuotes(Security security,List<Exception> errors){
  if (apiKey == null)   throw new IllegalArgumentException(Messages.MsgAlphaVantageAPIKeyMissing);
  String wknUrl=MessageFormat.format("String_Node_Str" + "String_Node_Str",security.getTickerSymbol(),apiKey);
  try {
    URL obj=new URL(wknUrl);
    HttpURLConnection con=(HttpURLConnection)obj.openConnection();
    con.setConnectTimeout(1000);
    con.setReadTimeout(20000);
    int responseCode=con.getResponseCode();
    if (responseCode != HttpURLConnection.HTTP_OK)     throw new IOException(wknUrl + "String_Node_Str" + responseCode);
    try (Scanner scanner=new Scanner(con.getInputStream(),StandardCharsets.UTF_8.name())){
      String body=scanner.useDelimiter("String_Node_Str").next();
      String[] lines=body.split("String_Node_Str");
      if (lines.length <= 2)       return false;
      if (!"String_Node_Str".equals(lines[0])) {
        errors.add(new IOException(MessageFormat.format(Messages.MsgUnexpectedHeader,body)));
        return false;
      }
      String line=lines[1];
      String[] values=line.split("String_Node_Str");
      if (values.length != 6)       throw new IOException(MessageFormat.format(Messages.MsgUnexpectedValue,line));
      DateTimeFormatter formatter=DateTimeFormatter.ofPattern("String_Node_Str");
      LatestSecurityPrice price=new LatestSecurityPrice();
      price.setDate(LocalDate.parse(values[0],formatter));
      price.setValue(asPrice(values[4]));
      price.setHigh(asPrice(values[2]));
      price.setLow(asPrice(values[3]));
      price.setVolume(Long.parseLong(values[5]));
      price.setPreviousClose(LatestSecurityPrice.NOT_AVAILABLE);
      security.setLatest(price);
      return true;
    }
   }
 catch (  IOException|ParseException e) {
    errors.add(e);
    return false;
  }
}