Program: 141879
Project: 141879
Buggy source:
/** 
 * This is an internal method called by track_ecommerce_transaction. It is not for public use.
 * @param order_id Order ID
 * @param sku Item SKU
 * @param price Item price
 * @param quantity Item quantity
 * @param name Item name
 * @param category Item category
 * @param currency The currency the price is expressed in
 * @param context Custom context for the event
 * @param timestamp Optional user-provided timestamp for the event
 */
protected void trackEcommerceTransactionItem(String order_id,String sku,Double price,Integer quantity,String name,String category,String currency,Map context,long timestamp){
  Preconditions.checkNotNull(name);
  Preconditions.checkNotNull(category);
  Preconditions.checkNotNull(currency);
  Preconditions.checkArgument(!order_id.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!sku.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!name.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!category.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!currency.isEmpty(),"String_Node_Str");
  Payload payload=new TrackerPayload();
  payload.add(Parameter.EVENT,Constants.EVENT_ECOMM_ITEM);
  payload.add(Parameter.TI_ITEM_ID,order_id);
  payload.add(Parameter.TI_ITEM_SKU,sku);
  payload.add(Parameter.TI_ITEM_NAME,name);
  payload.add(Parameter.TI_ITEM_CATEGORY,category);
  payload.add(Parameter.TI_ITEM_PRICE,price);
  payload.add(Parameter.TI_ITEM_QUANTITY,quantity);
  payload.add(Parameter.TI_ITEM_CURRENCY,currency);
  completePayload(payload,context,timestamp);
  addTrackerPayload(payload);
}

Fixed version (ground truth):
/** 
 * This is an internal method called by track_ecommerce_transaction. It is not for public use.
 * @param order_id Order ID
 * @param sku Item SKU
 * @param price Item price
 * @param quantity Item quantity
 * @param name Item name
 * @param category Item category
 * @param currency The currency the price is expressed in
 * @param context Custom context for the event
 * @param timestamp Optional user-provided timestamp for the event
 */
protected void trackEcommerceTransactionItem(String order_id,String sku,Double price,Integer quantity,String name,String category,String currency,List<Map> context,long timestamp){
  Preconditions.checkNotNull(name);
  Preconditions.checkNotNull(category);
  Preconditions.checkNotNull(currency);
  Preconditions.checkArgument(!order_id.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!sku.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!name.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!category.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!currency.isEmpty(),"String_Node_Str");
  Payload payload=new TrackerPayload();
  payload.add(Parameter.EVENT,Constants.EVENT_ECOMM_ITEM);
  payload.add(Parameter.TI_ITEM_ID,order_id);
  payload.add(Parameter.TI_ITEM_SKU,sku);
  payload.add(Parameter.TI_ITEM_NAME,name);
  payload.add(Parameter.TI_ITEM_CATEGORY,category);
  payload.add(Parameter.TI_ITEM_PRICE,price);
  payload.add(Parameter.TI_ITEM_QUANTITY,quantity);
  payload.add(Parameter.TI_ITEM_CURRENCY,currency);
  completePayload(payload,context,timestamp);
  addTrackerPayload(payload);
}