Fix #12415, 9c49a61, df400ef: Aircraft::tile is valid only for front vehicle (#12416)

(cherry picked from commit 243c6bead327f2654455c8da6fc1a1cef4f5cf62)

# Conflicts:
#	src/economy.cpp

src/aircraft.h

@@ -114,6 +114,7 @@ struct Aircraft final : public SpecializedVehicle<Aircraft, VEH_AIRCRAFT> {
 	void OnPeriodic() override;
 	uint Crash(bool flooded = false) override;
 	TileIndex GetOrderStationLocation(StationID station) override;
+	TileIndex GetCargoTile() const override { return this->First()->tile; }
 	ClosestDepot FindClosestDepot() override;
 
 	/**

src/economy.cpp

@@ -1569,7 +1569,7 @@ void PrepareUnload(Vehicle *front_v)
 						front_v->last_station_visited, next_station.Get(v->cargo_type),
 						GetUnloadType(v), ge,
 						front_v->cargo_payment,
-						v->tile);
+						v->GetCargoTile());
 				if (v->cargo.UnloadCount() > 0) SetBit(v->vehicle_flags, VF_CARGO_UNLOADING);
 			}
 		}
@@ -1727,7 +1727,7 @@ struct ReturnCargoAction
 	 */
 	bool operator()(Vehicle *v)
 	{
-		v->cargo.Return(UINT_MAX, &this->st->goods[v->cargo_type].CreateData().cargo, this->next_hop, v->tile);
+		v->cargo.Return(UINT_MAX, &this->st->goods[v->cargo_type].CreateData().cargo, this->next_hop, v->GetCargoTile());
 		return true;
 	}
 };
@@ -1764,7 +1764,7 @@ struct FinalizeRefitAction
 	{
 		if (this->do_reserve || (cargo_type_loading == nullptr || (cargo_type_loading->current_order.GetCargoLoadTypeRaw(v->cargo_type) & OLFB_FULL_LOAD))) {
 			this->st->goods[v->cargo_type].CreateData().cargo.Reserve(v->cargo_cap - v->cargo.RemainingCount(),
-					&v->cargo, this->next_station.Get(v->cargo_type), v->tile);
+					&v->cargo, this->next_station.Get(v->cargo_type), v->GetCargoTile());
 		}
 		this->consist_capleft[v->cargo_type] += v->cargo_cap - v->cargo.RemainingCount();
 		return true;
@@ -1869,7 +1869,7 @@ struct ReserveCargoAction {
 		}
 		if (v->cargo_cap > v->cargo.RemainingCount() && MayLoadUnderExclusiveRights(st, v)) {
 			st->goods[v->cargo_type].CreateData().cargo.Reserve(v->cargo_cap - v->cargo.RemainingCount(),
-					&v->cargo, next_station.Get(v->cargo_type), v->tile);
+					&v->cargo, next_station.Get(v->cargo_type), v->GetCargoTile());
 		}
 
 		return true;
@@ -2107,7 +2107,7 @@ static void LoadUnloadVehicle(Vehicle *front)
 					uint new_remaining = v->cargo.RemainingCount() + v->cargo.ActionCount(VehicleCargoList::MTA_DELIVER);
 					if (v->cargo_cap < new_remaining) {
 						/* Return some of the reserved cargo to not overload the vehicle. */
-						v->cargo.Return(new_remaining - v->cargo_cap, &ged->cargo, INVALID_STATION, v->tile);
+						v->cargo.Return(new_remaining - v->cargo_cap, &ged->cargo, INVALID_STATION, v->GetCargoTile());
 					}
 
 					/* Keep instead of delivering. This may lead to no cargo being unloaded, so ...*/
@@ -2134,7 +2134,7 @@ static void LoadUnloadVehicle(Vehicle *front)
 				}
 			}
 
-			amount_unloaded = v->cargo.Unload(amount_unloaded, &ged->cargo, payment, v->tile);
+			amount_unloaded = v->cargo.Unload(amount_unloaded, &ged->cargo, payment, v->GetCargoTile());
 			remaining = v->cargo.UnloadCount() > 0;
 			if (amount_unloaded > 0) {
 				dirty_vehicle = true;
@@ -2210,7 +2210,7 @@ static void LoadUnloadVehicle(Vehicle *front)
 				if (v->cargo.StoredCount() == 0) TriggerVehicle(v, VEHICLE_TRIGGER_NEW_CARGO);
 				if (_settings_game.order.gradual_loading) cap_left = std::min(cap_left, GetLoadAmount(v));
 
-				uint loaded = ged->cargo.Load(cap_left, &v->cargo, next_station.Get(v->cargo_type), v->tile);
+				uint loaded = ged->cargo.Load(cap_left, &v->cargo, next_station.Get(v->cargo_type), v->GetCargoTile());
 				if (v->cargo.ActionCount(VehicleCargoList::MTA_LOAD) > 0) {
 					/* Remember if there are reservations left so that we don't stop
 					 * loading before they're loaded. */

src/vehicle_base.h

@@ -957,6 +957,8 @@ public:
 	 */
 	virtual TileIndex GetOrderStationLocation([[maybe_unused]] StationID station) { return INVALID_TILE; }
 
+	virtual TileIndex GetCargoTile() const { return this->tile; }
+
 	/**
 	 * Find the closest depot for this vehicle and tell us the location,
 	 * DestinationID and whether we should reverse.