Program: 158827
Project: 158827
Buggy source:
@Override protected void readLine(String line,DeckCardLists deckList){
  if (line.length() == 0 || line.startsWith("String_Node_Str")) {
    return;
  }
  boolean sideboard=false;
  if (line.startsWith("String_Node_Str")) {
    line=line.substring(3).trim();
    sideboard=true;
  }
  int delim=line.indexOf(' ');
  String lineNum=line.substring(0,delim).trim();
  String setCode="String_Node_Str";
  if (line.indexOf('[') != -1) {
    int setStart=line.indexOf('[') + 1;
    int setEnd=line.indexOf(']');
    setCode=line.substring(setStart,setEnd).trim();
    delim=setEnd;
  }
  String lineName=line.substring(delim + 1).trim();
  try {
    int num=Integer.parseInt(lineNum);
    CardInfo cardInfo=null;
    if (!setCode.isEmpty()) {
      CardCriteria criteria=new CardCriteria();
      criteria.name(lineName);
      criteria.setCodes(setCode);
      List<CardInfo> cards=null;
      cards=CardRepository.instance.findCards(criteria);
      if (!cards.isEmpty()) {
        cardInfo=cards.get(new Random().nextInt(cards.size()));
      }
    }
 else {
      cardInfo=CardRepository.instance.findPreferedCoreExpansionCard(lineName);
    }
    if (cardInfo == null) {
      sbMessage.append("String_Node_Str").append(lineName).append("String_Node_Str").append(lineCount).append("String_Node_Str");
    }
 else {
      for (int i=0; i < num; i++) {
        if (!sideboard) {
          deckList.getCards().add(new DeckCardInfo(cardInfo.getName(),cardInfo.getCardNumber(),cardInfo.getSetCode()));
        }
 else {
          deckList.getSideboard().add(new DeckCardInfo(cardInfo.getName(),cardInfo.getCardNumber(),cardInfo.getSetCode()));
        }
      }
    }
  }
 catch (  NumberFormatException nfe) {
    sbMessage.append("String_Node_Str").append(lineNum).append("String_Node_Str").append(lineCount).append("String_Node_Str");
  }
}

Fixed version (ground truth):
@Override protected void readLine(String line,DeckCardLists deckList){
  if (line.length() == 0 || line.startsWith("String_Node_Str")) {
    return;
  }
  boolean sideboard=false;
  if (line.startsWith("String_Node_Str")) {
    line=line.substring(3).trim();
    sideboard=true;
  }
  int delim=line.indexOf(' ');
  String lineNum=line.substring(0,delim).trim();
  String setCode="String_Node_Str";
  if (line.indexOf('[') != -1) {
    int setStart=line.indexOf('[') + 1;
    int setEnd=line.indexOf(']');
    setCode=line.substring(setStart,setEnd).trim();
    delim=setEnd;
  }
  String lineName=line.substring(delim + 1).trim();
  try {
    int num=Integer.parseInt(lineNum);
    CardInfo cardInfo=null;
    if (!setCode.isEmpty()) {
      CardCriteria criteria=new CardCriteria();
      criteria.name(lineName);
      criteria.setCodes(setCode);
      List<CardInfo> cards=null;
      cards=CardRepository.instance.findCards(criteria);
      if (!cards.isEmpty()) {
        cardInfo=cards.get(new Random().nextInt(cards.size()));
      }
    }
 else {
      cardInfo=CardRepository.instance.findPreferedCoreExpansionCard(lineName,true);
    }
    if (cardInfo == null) {
      sbMessage.append("String_Node_Str").append(lineName).append("String_Node_Str").append(lineCount).append("String_Node_Str");
    }
 else {
      for (int i=0; i < num; i++) {
        if (!sideboard) {
          deckList.getCards().add(new DeckCardInfo(cardInfo.getName(),cardInfo.getCardNumber(),cardInfo.getSetCode()));
        }
 else {
          deckList.getSideboard().add(new DeckCardInfo(cardInfo.getName(),cardInfo.getCardNumber(),cardInfo.getSetCode()));
        }
      }
    }
  }
 catch (  NumberFormatException nfe) {
    sbMessage.append("String_Node_Str").append(lineNum).append("String_Node_Str").append(lineCount).append("String_Node_Str");
  }
}