Program: 1144
Project: 1144
Buggy source:
/** 
 * Responsible for tick update - see if we should attempt to spawn something
 * @param delta time step since last update
 */
public void update(float delta){
  tick+=delta * 1000;
  if (tick - lastTick < timeBetweenSpawns) {
    return;
  }
  logger.info("String_Node_Str");
  lastTick=tick;
  int maxMobs=entityManager.getComponentCount(SpawnerComponent.class) * maxMobsPerSpawner + maxMobsPerSpawner;
  int currentMobs=entityManager.getComponentCount(SimpleAIComponent.class);
  logger.info("String_Node_Str",currentMobs,maxMobs);
  if (currentMobs >= maxMobs) {
    logger.info("String_Node_Str");
    return;
  }
  logger.info("String_Node_Str",entityManager.getComponentCount(SpawnerComponent.class));
  for (  EntityRef entity : entityManager.iteratorEntities(SpawnerComponent.class,BlockComponent.class)) {
    logger.info("String_Node_Str" + entity);
    SpawnerComponent spawnComp=entity.getComponent(SpawnerComponent.class);
    BlockComponent blockComp=entity.getComponent(BlockComponent.class);
    if (currentMobs < maxMobs) {
      Vector3f pos=blockComp.getPosition().toVector3f();
      logger.info("String_Node_Str",pos);
      String chosenSpawnerType=spawnComp.types.get(random.randomIntAbs(spawnComp.types.size()));
      Set randomType=typeLists.get(chosenSpawnerType);
      logger.info("String_Node_Str",chosenSpawnerType,randomType.size());
      if (randomType.size() == 0) {
        logger.warn("String_Node_Str");
        return;
      }
      int anotherRandomIndex=random.randomIntAbs(randomType.size());
      Object[] randomPrefabs=randomType.toArray();
      Prefab chosenPrefab=(Prefab)randomPrefabs[anotherRandomIndex];
      logger.info("String_Node_Str",anotherRandomIndex,chosenSpawnerType,chosenPrefab);
      factory.generateGelatinousCube(pos,chosenPrefab);
      currentMobs++;
    }
  }
}

Fixed version (ground truth):
/** 
 * Responsible for tick update - see if we should attempt to spawn something
 * @param delta time step since last update
 */
public void update(float delta){
  tick+=delta * 1000;
  if (tick - lastTick < timeBetweenSpawns) {
    return;
  }
  logger.info("String_Node_Str");
  lastTick=tick;
  int maxMobs=entityManager.getComponentCount(SpawnerComponent.class) * maxMobsPerSpawner + maxMobsPerSpawner;
  int currentMobs=entityManager.getComponentCount(SimpleAIComponent.class);
  logger.info("String_Node_Str",currentMobs,maxMobs);
  if (currentMobs >= maxMobs) {
    logger.info("String_Node_Str");
    return;
  }
  logger.info("String_Node_Str",entityManager.getComponentCount(SpawnerComponent.class));
  for (  EntityRef entity : entityManager.iteratorEntities(SpawnerComponent.class,BlockComponent.class)) {
    logger.info("String_Node_Str",entity);
    SpawnerComponent spawnComp=entity.getComponent(SpawnerComponent.class);
    int spawnTypes=spawnComp.types.size();
    if (spawnTypes == 0) {
      logger.warn("String_Node_Str");
      continue;
    }
    BlockComponent blockComp=entity.getComponent(BlockComponent.class);
    if (currentMobs < maxMobs) {
      Vector3f pos=blockComp.getPosition().toVector3f();
      logger.info("String_Node_Str",pos);
      String chosenSpawnerType=spawnComp.types.get(random.randomIntAbs(spawnComp.types.size()));
      Set randomType=typeLists.get(chosenSpawnerType);
      logger.info("String_Node_Str",chosenSpawnerType,randomType.size());
      if (randomType.size() == 0) {
        logger.warn("String_Node_Str");
        return;
      }
      int anotherRandomIndex=random.randomIntAbs(randomType.size());
      Object[] randomPrefabs=randomType.toArray();
      Prefab chosenPrefab=(Prefab)randomPrefabs[anotherRandomIndex];
      logger.info("String_Node_Str",anotherRandomIndex,chosenSpawnerType,chosenPrefab);
      factory.generateGelatinousCube(pos,chosenPrefab);
      currentMobs++;
    }
  }
}