Program: 187511
Project: 187511
Buggy source:
public void schedule(){
  if (pickup && (!Permissions.hasExtended(myPet.getOwner().getPlayer(),"String_Node_Str") || myPet.getOwner().isInExternalGames())) {
    pickup=false;
    myPet.sendMessageToOwner(Util.formatText(Locales.getString(("String_Node_Str"),myPet.getOwner().getPlayer()),myPet.getPetName(),Locales.getString("String_Node_Str",myPet.getOwner())));
    return;
  }
  if (range > 0 && pickup && myPet.getStatus() == PetState.Here && myPet.getSkills().isSkillActive(Inventory.class)) {
    for (    Entity entity : myPet.getCraftPet().getNearbyEntities(range,range,range)) {
      if (entity instanceof Item) {
        Item itemEntity=(Item)entity;
        ItemStack itemStack=itemEntity.getItemStack();
        if (itemStack.getAmount() > 0) {
          PlayerPickupItemEvent playerPickupEvent=new PlayerPickupItemEvent(myPet.getOwner().getPlayer(),itemEntity,itemStack.getAmount());
          Bukkit.getServer().getPluginManager().callEvent(playerPickupEvent);
          if (playerPickupEvent.isCancelled()) {
            continue;
          }
          CustomInventory inv=myPet.getSkills().getSkill(Inventory.class).inv;
          int itemAmount=inv.addItem(itemStack);
          if (itemAmount == 0) {
            for (            Entity p : itemEntity.getNearbyEntities(20,20,20)) {
              if (p instanceof Player) {
                ((CraftPlayer)p).getHandle().playerConnection.sendPacket(new Packet22Collect(entity.getEntityId(),myPet.getCraftPet().getEntityId()));
              }
            }
            myPet.getCraftPet().getHandle().makeSound("String_Node_Str",0.2F,1.0F);
            itemStack.setAmount(0);
            itemEntity.remove();
          }
 else {
            itemStack.setAmount(itemAmount);
          }
        }
      }
      if (expPickup && entity instanceof ExperienceOrb) {
        ExperienceOrb expEntity=(ExperienceOrb)entity;
        myPet.getOwner().getPlayer().giveExp(expEntity.getExperience());
        for (        Entity p : expEntity.getNearbyEntities(20,20,20)) {
          if (p instanceof Player) {
            ((CraftPlayer)p).getHandle().playerConnection.sendPacket(new Packet22Collect(entity.getEntityId(),myPet.getCraftPet().getEntityId()));
          }
        }
        expEntity.setExperience(0);
        expEntity.remove();
      }
    }
  }
}

Fixed version (ground truth):
public void schedule(){
  if (pickup && (!Permissions.hasExtended(myPet.getOwner().getPlayer(),"String_Node_Str") || myPet.getOwner().isInExternalGames())) {
    pickup=false;
    myPet.sendMessageToOwner(Util.formatText(Locales.getString(("String_Node_Str"),myPet.getOwner().getPlayer()),myPet.getPetName(),Locales.getString("String_Node_Str",myPet.getOwner())));
    return;
  }
  if (range > 0 && pickup && myPet.getStatus() == PetState.Here && myPet.getSkills().isSkillActive(Inventory.class)) {
    for (    Entity entity : myPet.getCraftPet().getNearbyEntities(range,range,range)) {
      if (!entity.isDead()) {
        if (entity instanceof Item) {
          Item itemEntity=(Item)entity;
          ItemStack itemStack=itemEntity.getItemStack();
          if (itemStack.getAmount() > 0) {
            PlayerPickupItemEvent playerPickupEvent=new PlayerPickupItemEvent(myPet.getOwner().getPlayer(),itemEntity,itemStack.getAmount());
            Bukkit.getServer().getPluginManager().callEvent(playerPickupEvent);
            if (playerPickupEvent.isCancelled()) {
              continue;
            }
            CustomInventory inv=myPet.getSkills().getSkill(Inventory.class).inv;
            int itemAmount=inv.addItem(itemStack);
            if (itemAmount == 0) {
              for (              Entity p : itemEntity.getNearbyEntities(20,20,20)) {
                if (p instanceof Player) {
                  ((CraftPlayer)p).getHandle().playerConnection.sendPacket(new Packet22Collect(entity.getEntityId(),myPet.getCraftPet().getEntityId()));
                }
              }
              myPet.getCraftPet().getHandle().makeSound("String_Node_Str",0.2F,1.0F);
              itemStack.setAmount(0);
              itemEntity.remove();
            }
 else {
              itemStack.setAmount(itemAmount);
              itemEntity.setItemStack(itemStack);
            }
          }
        }
        if (expPickup && entity instanceof ExperienceOrb) {
          ExperienceOrb expEntity=(ExperienceOrb)entity;
          myPet.getOwner().getPlayer().giveExp(expEntity.getExperience());
          for (          Entity p : expEntity.getNearbyEntities(20,20,20)) {
            if (p instanceof Player) {
              ((CraftPlayer)p).getHandle().playerConnection.sendPacket(new Packet22Collect(entity.getEntityId(),myPet.getCraftPet().getEntityId()));
            }
          }
          expEntity.setExperience(0);
          expEntity.remove();
        }
      }
    }
  }
}