@EventHandler(ignoreCancelled = true)
  public void onInventoryOpen(InventoryOpenEvent event) {
    Inventory inv = event.getInventory();
    Location location;
    try {
      location = inv.getLocation();
    } catch (AbstractMethodError e) {
      System.err.println(new StringBuilder("Caught AbstractMethodError calling Inventory#getLocation on class ")
          .append(inv.getClass().getName())
          .append("\nType: ").append(inv.getType())
          .append("\nTitle: ").append(inv.getTitle())
          .append("\nHolder: ").append(inv.getHolder()));
      return;
    }
  }

[Server thread/WARN]: Caught AbstractMethodError calling Inventory#getLocation on class org.bukkit.craftbukkit.v1_9_R1.inventory.CraftInventory
Type: CHEST
Title: Minecart with Chest
Holder: CraftMinecartChest{inventory=org.bukkit.craftbukkit.v1_9_R1.inventory.CraftInventory@22eb6}