Program: 44424
Project: 44424
Buggy source:
public void onEntityDeath(EntityDeathEvent paramEntityDeathEvent){
  if ((paramEntityDeathEvent.getEntity() instanceof Player))   return;
  LivingEntity localLivingEntity=(LivingEntity)paramEntityDeathEvent.getEntity();
  Player localPlayer=(Player)this.recent.get(paramEntityDeathEvent.getEntity());
  if (localPlayer != null) {
    if (ecoConstants.OD)     paramEntityDeathEvent.getDrops().clear();
    if ((!ecoConstants.BR) && (localPlayer.getItemInHand().getTypeId() == 261)) {
      localPlayer.sendMessage(ecoConstants.MNB);
      this.recent.remove(paramEntityDeathEvent.getEntity());
    }
 else     if ((!ecoConstants.AUSL) && (UnderSeaLevel(localPlayer))) {
      localPlayer.sendMessage(ecoConstants.MNB);
      this.recent.remove(paramEntityDeathEvent.getEntity());
    }
 else {
      if (((!ecoConstants.AC) && (FindSpawnersPlayer(localPlayer)) && (FindSpawnersCreature(localLivingEntity))) || ((!ecoConstants.AC) && (FindSpawnersPlayer(localPlayer))) || ((!ecoConstants.AC) && (FindSpawnersCreature(localLivingEntity)))) {
        if (ecoConstants.CCD)         paramEntityDeathEvent.getDrops().clear();
        if (ecoConstants.MS)         localPlayer.sendMessage(ecoConstants.MNC);
      }
 else       if (ecoCreature.Permissions.has(localPlayer,"String_Node_Str" + localLivingEntity.getClass().getSimpleName())) {
        ecoCreature.getRewardHandler().CashRegistry(localPlayer,cIndex(localLivingEntity.getClass().getSimpleName()),Material.getMaterial(localPlayer.getItemInHand().getTypeId()).name());
      }
      if (ecoConstants.uQuestHooking) {
        double d1=Math.floor(Math.random() * 100.0D);
        if (d1 < ecoConstants.uQuestRQP)         ecoCreature.questInteraction.giveQuestRandom(localPlayer,true);
      }
      for (int i=0; i < ecoConstants.CD[cIndex(localLivingEntity.getClass().getSimpleName())].length; i++) {
        double d2=Math.floor(Math.random() * 100.0D);
        Random localRandom=new Random();
        if (d2 >= ecoConstants.CD[cIndex(localLivingEntity.getClass().getSimpleName())][i][2])         continue;
        int j=(int)ecoConstants.CD[cIndex(localLivingEntity.getClass().getSimpleName())][i][1];
        int k=0;
        if (ecoConstants.FD)         k=j;
 else         k=localRandom.nextInt(j) + 1;
        ItemStack localItemStack=new ItemStack((int)ecoConstants.CD[cIndex(localLivingEntity.getClass().getSimpleName())][i][0],k,0);
        if (localItemStack == null)         continue;
        if (localItemStack.getAmount() == 0)         localPlayer.sendMessage("String_Node_Str");
 else         paramEntityDeathEvent.getDrops().addAll(Arrays.asList(new ItemStack[]{localItemStack}));
      }
      this.recent.remove(paramEntityDeathEvent.getEntity());
    }
  }
}

Fixed version (ground truth):
public void onEntityDeath(EntityDeathEvent paramEntityDeathEvent){
  if ((paramEntityDeathEvent.getEntity() instanceof Player))   return;
  LivingEntity localLivingEntity=(LivingEntity)paramEntityDeathEvent.getEntity();
  Player localPlayer=(Player)this.recent.get(paramEntityDeathEvent.getEntity());
  if (localPlayer != null) {
    if (ecoConstants.OD)     paramEntityDeathEvent.getDrops().clear();
    if ((!ecoConstants.BR) && (localPlayer.getItemInHand().getTypeId() == 261)) {
      localPlayer.sendMessage(ecoConstants.MNB);
      this.recent.remove(paramEntityDeathEvent.getEntity());
    }
 else     if ((!ecoConstants.AUSL) && (UnderSeaLevel(localPlayer))) {
      localPlayer.sendMessage(ecoConstants.MNB);
      this.recent.remove(paramEntityDeathEvent.getEntity());
    }
 else {
      if (((!ecoConstants.AC) && (FindSpawnersPlayer(localPlayer)) && (FindSpawnersCreature(localLivingEntity))) || ((!ecoConstants.AC) && (FindSpawnersPlayer(localPlayer))) || ((!ecoConstants.AC) && (FindSpawnersCreature(localLivingEntity)))) {
        if (ecoConstants.CCD)         paramEntityDeathEvent.getDrops().clear();
        if (ecoConstants.MS)         localPlayer.sendMessage(ecoConstants.MNC);
      }
 else       if (ecoCreature.Permissions.has(localPlayer,"String_Node_Str" + localLivingEntity.getClass().getSimpleName())) {
        ecoCreature.getRewardHandler().CashRegistry(localPlayer,cIndex(localLivingEntity.getClass().getSimpleName()),Material.getMaterial(localPlayer.getItemInHand().getTypeId()).name());
      }
      if (ecoConstants.uQuestHooking) {
        double d1=Math.floor(Math.random() * 100.0D);
        if (d1 < ecoConstants.uQuestRQP)         ecoCreature.questInteraction.giveQuestRandom(localPlayer,true);
      }
      for (int i=0; i < ecoConstants.CD[cIndex(localLivingEntity.getClass().getSimpleName())].length; i++) {
        double d2=Math.floor(Math.random() * 100.0D);
        Random localRandom=new Random();
        if (d2 >= ecoConstants.CD[cIndex(localLivingEntity.getClass().getSimpleName())][i][2])         continue;
        int j=(int)ecoConstants.CD[cIndex(localLivingEntity.getClass().getSimpleName())][i][1];
        int k=0;
        if (ecoConstants.FD)         k=j;
 else         k=localRandom.nextInt(j) + 1;
        ItemStack localItemStack=new ItemStack((int)ecoConstants.CD[cIndex(localLivingEntity.getClass().getSimpleName())][i][0],k,(short)0);
        if (localItemStack == null)         continue;
        if (localItemStack.getAmount() == 0)         localPlayer.sendMessage("String_Node_Str");
 else         paramEntityDeathEvent.getDrops().addAll(Arrays.asList(new ItemStack[]{localItemStack}));
      }
      this.recent.remove(paramEntityDeathEvent.getEntity());
    }
  }
}