Program: 159862
Project: 159862
Buggy source:
@Override public boolean apply(Game game,Ability source){
  Player controller=game.getPlayer(source.getControllerId());
  if (controller == null) {
    return false;
  }
  for (  UUID playerId : controller.getInRange()) {
    Cards playerLibrary=new CardsImpl();
    Player player=game.getPlayer(playerId);
    playerLibrary.addAll(player.getLibrary().getCardList());
    String playerName=new StringBuilder(player.getName()).append("String_Node_Str").toString();
    if (source.getControllerId().equals(player.getId())) {
      playerName="String_Node_Str";
    }
    TargetCardInLibrary target=new TargetCardInLibrary(new FilterNonlandCard(new StringBuilder("String_Node_Str").append(playerName).append("String_Node_Str").toString()));
    if (controller.choose(Constants.Outcome.Benefit,playerLibrary,target,game)) {
      UUID targetId=target.getFirstTarget();
      Card card=player.getLibrary().remove(targetId,game);
      if (card != null) {
        card.moveToExile(source.getSourceId(),"String_Node_Str",source.getSourceId(),game);
      }
    }
    player.shuffleLibrary(game);
  }
  ExileZone JaceExileZone=game.getExile().getExileZone(source.getSourceId());
  FilterCard filter=new FilterCard("String_Node_Str");
  TargetCardInExile target=new TargetCardInExile(filter,source.getSourceId());
  while (JaceExileZone.count(filter,game) > 0 && controller.choose(Outcome.PlayForFree,JaceExileZone,target,game)) {
    Card card=game.getCard(target.getFirstTarget());
    if (card != null) {
      if (controller.cast(card.getSpellAbility(),game,true)) {
        game.getExile().removeCard(card,game);
      }
    }
    target.clearChosen();
  }
  return true;
}

Fixed version (ground truth):
@Override public boolean apply(Game game,Ability source){
  Player controller=game.getPlayer(source.getControllerId());
  if (controller == null) {
    return false;
  }
  for (  UUID playerId : controller.getInRange()) {
    Cards playerLibrary=new CardsImpl();
    Player player=game.getPlayer(playerId);
    playerLibrary.addAll(player.getLibrary().getCardList());
    String playerName=new StringBuilder(player.getName()).append("String_Node_Str").toString();
    if (source.getControllerId().equals(player.getId())) {
      playerName="String_Node_Str";
    }
    TargetCardInLibrary target=new TargetCardInLibrary(new FilterNonlandCard(new StringBuilder("String_Node_Str").append(playerName).append("String_Node_Str").toString()));
    if (controller.choose(Outcome.Benefit,playerLibrary,target,game)) {
      UUID targetId=target.getFirstTarget();
      Card card=player.getLibrary().remove(targetId,game);
      if (card != null) {
        card.moveToExile(source.getSourceId(),"String_Node_Str",source.getSourceId(),game);
      }
    }
    player.shuffleLibrary(game);
  }
  ExileZone JaceExileZone=game.getExile().getExileZone(source.getSourceId());
  FilterCard filter=new FilterCard("String_Node_Str");
  TargetCardInExile target=new TargetCardInExile(filter,source.getSourceId());
  while (JaceExileZone.count(filter,game) > 0 && controller.choose(Outcome.PlayForFree,JaceExileZone,target,game)) {
    Card card=game.getCard(target.getFirstTarget());
    if (card != null) {
      if (controller.cast(card.getSpellAbility(),game,true)) {
        game.getExile().removeCard(card,game);
      }
    }
    target.clearChosen();
  }
  return true;
}