Program: 141880
Project: 141880
Buggy source:
/** 
 * @param order_id ID of the eCommerce transaction
 * @param total_value Total transaction value
 * @param affiliation Transaction affiliation
 * @param tax_value Transaction tax value
 * @param shipping Delivery cost charged
 * @param city Delivery address city
 * @param state Delivery address state
 * @param country Delivery address country
 * @param currency The currency the price is expressed in
 * @param items The items in the transaction
 * @param context Custom context for the event
 * @param timestamp Optional user-provided timestamp for the event
 */
public void trackEcommerceTransaction(String order_id,Double total_value,String affiliation,Double tax_value,Double shipping,String city,String state,String country,String currency,List<TransactionItem> items,Map context,long timestamp){
  Preconditions.checkNotNull(affiliation);
  Preconditions.checkNotNull(city);
  Preconditions.checkNotNull(state);
  Preconditions.checkNotNull(country);
  Preconditions.checkNotNull(currency);
  Preconditions.checkArgument(!order_id.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!affiliation.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!city.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!state.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!country.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!currency.isEmpty(),"String_Node_Str");
  Payload payload=new TrackerPayload();
  payload.add(Parameter.EVENT,Constants.EVENT_ECOMM);
  payload.add(Parameter.TR_ID,order_id);
  payload.add(Parameter.TR_TOTAL,total_value);
  payload.add(Parameter.TR_AFFILIATION,affiliation);
  payload.add(Parameter.TR_TAX,tax_value);
  payload.add(Parameter.TR_SHIPPING,shipping);
  payload.add(Parameter.TR_CITY,city);
  payload.add(Parameter.TR_STATE,state);
  payload.add(Parameter.TR_COUNTRY,country);
  payload.add(Parameter.TR_CURRENCY,currency);
  completePayload(payload,context,timestamp);
  for (  TransactionItem item : items) {
    trackEcommerceTransactionItem((String)item.get(Parameter.TI_ITEM_ID),(String)item.get(Parameter.TI_ITEM_SKU),(Double)item.get(Parameter.TI_ITEM_PRICE),(Integer)item.get(Parameter.TI_ITEM_QUANTITY),(String)item.get(Parameter.TI_ITEM_NAME),(String)item.get(Parameter.TI_ITEM_CATEGORY),(String)item.get(Parameter.TI_ITEM_CURRENCY),(Map)item.get(Parameter.CONTEXT),timestamp);
  }
}

Fixed version (ground truth):
/** 
 * @param order_id ID of the eCommerce transaction
 * @param total_value Total transaction value
 * @param affiliation Transaction affiliation
 * @param tax_value Transaction tax value
 * @param shipping Delivery cost charged
 * @param city Delivery address city
 * @param state Delivery address state
 * @param country Delivery address country
 * @param currency The currency the price is expressed in
 * @param items The items in the transaction
 * @param context Custom context for the event
 * @param timestamp Optional user-provided timestamp for the event
 */
public void trackEcommerceTransaction(String order_id,Double total_value,String affiliation,Double tax_value,Double shipping,String city,String state,String country,String currency,List<TransactionItem> items,List<Map> context,long timestamp){
  Preconditions.checkNotNull(affiliation);
  Preconditions.checkNotNull(city);
  Preconditions.checkNotNull(state);
  Preconditions.checkNotNull(country);
  Preconditions.checkNotNull(currency);
  Preconditions.checkArgument(!order_id.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!affiliation.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!city.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!state.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!country.isEmpty(),"String_Node_Str");
  Preconditions.checkArgument(!currency.isEmpty(),"String_Node_Str");
  Payload payload=new TrackerPayload();
  payload.add(Parameter.EVENT,Constants.EVENT_ECOMM);
  payload.add(Parameter.TR_ID,order_id);
  payload.add(Parameter.TR_TOTAL,total_value);
  payload.add(Parameter.TR_AFFILIATION,affiliation);
  payload.add(Parameter.TR_TAX,tax_value);
  payload.add(Parameter.TR_SHIPPING,shipping);
  payload.add(Parameter.TR_CITY,city);
  payload.add(Parameter.TR_STATE,state);
  payload.add(Parameter.TR_COUNTRY,country);
  payload.add(Parameter.TR_CURRENCY,currency);
  completePayload(payload,context,timestamp);
  for (  TransactionItem item : items) {
    trackEcommerceTransactionItem((String)item.get(Parameter.TI_ITEM_ID),(String)item.get(Parameter.TI_ITEM_SKU),(Double)item.get(Parameter.TI_ITEM_PRICE),(Integer)item.get(Parameter.TI_ITEM_QUANTITY),(String)item.get(Parameter.TI_ITEM_NAME),(String)item.get(Parameter.TI_ITEM_CATEGORY),(String)item.get(Parameter.TI_ITEM_CURRENCY),(List<Map>)item.get(Parameter.CONTEXT),timestamp);
  }
}