fix

service/service_price.go

@@ -327,6 +327,9 @@ func (ps *PriceService) GenerateLadderPrice(sku model.LySku) model.LySku {
 				if costMapIndex <= 0 {
 					costMapIndex = 0
 				}
+				if costMapIndex >= len(priceRatioList) {
+					return sku
+				}
 				priceRatioAndPurchases = priceRatioList[costMapIndex]
 				priceCnRatio := priceRatioAndPurchases.Ratio
 				priceUsRatio := priceRatioAndPurchases.RatioUsd