Program: 112743
Project: 112743
Buggy source:
/** 
 * Discards a random card
 * @param side
 * @param boardState The BoardState before this card has performed its action.  It will be manipulated and returned.
 * @return The boardState is manipulated and returned
 */
@Override public HearthTreeNode useOn(PlayerSide side,Minion targetMinion,HearthTreeNode boardState,Deck deckPlayer0,Deck deckPlayer1,boolean singleRealizationOnly) throws HSException {
  HearthTreeNode toRet=null;
  if (singleRealizationOnly) {
    toRet=super.useOn(side,targetMinion,boardState,deckPlayer0,deckPlayer1,singleRealizationOnly);
    IdentityLinkedList<Card> hand=PlayerSide.CURRENT_PLAYER.getPlayer(toRet).getHand();
    if (hand.size() > 0) {
      Card targetCard=hand.get((int)(Math.random() * hand.size()));
      toRet.data_.removeCard_hand(targetCard);
    }
  }
 else {
    int targetCharacterIndex=targetMinion instanceof Hero ? 0 : side.getPlayer(boardState).getMinions().indexOf(targetMinion) + 1;
    int thisCardIndex=side.getPlayer(boardState).getHand().indexOf(this);
    toRet=new RandomEffectNode(boardState,new HearthAction(HearthAction.Verb.USE_CARD,PlayerSide.CURRENT_PLAYER,0,side,targetCharacterIndex));
    for (int indx=0; indx < toRet.data_.getCurrentPlayerHand().size(); ++indx) {
      if (indx != thisCardIndex) {
        HearthTreeNode cNode=new HearthTreeNode((BoardModel)toRet.data_.deepCopy());
        Minion cTargetMinion=cNode.data_.getCurrentPlayerCharacter(targetCharacterIndex);
        Soulfire cCard=(Soulfire)cNode.data_.getCurrentPlayerHand().get(thisCardIndex);
        cNode=cCard.callSuperUseOn(side,cTargetMinion,cNode,deckPlayer0,deckPlayer1,false);
        if (cNode != null) {
          cNode.data_.removeCard_hand(cNode.data_.getCurrentPlayerHand().get(indx < thisCardIndex ? indx : indx - 1));
          toRet.addChild(cNode);
        }
      }
    }
  }
  return toRet;
}

Fixed version (ground truth):
/** 
 * Discards a random card
 * @param side
 * @param boardState The BoardState before this card has performed its action.  It will be manipulated and returned.
 * @return The boardState is manipulated and returned
 */
@Override public HearthTreeNode useOn(PlayerSide side,Minion targetMinion,HearthTreeNode boardState,Deck deckPlayer0,Deck deckPlayer1,boolean singleRealizationOnly) throws HSException {
  HearthTreeNode toRet=null;
  if (singleRealizationOnly) {
    toRet=super.useOn(side,targetMinion,boardState,deckPlayer0,deckPlayer1,singleRealizationOnly);
    IdentityLinkedList<Card> hand=PlayerSide.CURRENT_PLAYER.getPlayer(toRet).getHand();
    if (hand.size() > 0) {
      Card targetCard=hand.get((int)(Math.random() * hand.size()));
      toRet.data_.removeCard_hand(targetCard);
    }
  }
 else {
    int targetCharacterIndex=targetMinion instanceof Hero ? 0 : side.getPlayer(boardState).getMinions().indexOf(targetMinion) + 1;
    int thisCardIndex=PlayerSide.CURRENT_PLAYER.getPlayer(boardState).getHand().indexOf(this);
    if (boardState.data_.getCurrentPlayerHand().size() == 1) {
      toRet=this.callSuperUseOn(side,targetMinion,boardState,deckPlayer0,deckPlayer1,false);
    }
 else {
      toRet=new RandomEffectNode(boardState,new HearthAction(HearthAction.Verb.USE_CARD,PlayerSide.CURRENT_PLAYER,thisCardIndex,side,targetCharacterIndex));
      for (int indx=0; indx < toRet.data_.getCurrentPlayerHand().size(); ++indx) {
        if (indx != thisCardIndex) {
          HearthTreeNode cNode=new HearthTreeNode((BoardModel)toRet.data_.deepCopy());
          Minion cTargetMinion=cNode.data_.getCharacter(side,targetCharacterIndex);
          Soulfire cCard=(Soulfire)cNode.data_.getCurrentPlayerHand().get(thisCardIndex);
          cNode=cCard.callSuperUseOn(side,cTargetMinion,cNode,deckPlayer0,deckPlayer1,false);
          if (cNode != null) {
            cNode.data_.removeCard_hand(cNode.data_.getCurrentPlayerHand().get(indx < thisCardIndex ? indx : indx - 1));
            toRet.addChild(cNode);
          }
        }
      }
    }
  }
  return toRet;
}