每当我保存Realm对象时，我都会崩溃，崩溃点指向类型为SaleItemVariation的属性，该属性从RLMAccessor.mm设置为nil。if(_promote_existing&&[objisKindOfClass:_info.rlmObjectSchema.objectClass]&&!prop.swiftIvar){//settheivarsforobjectandarraypropertiestonilasotherwisethe//accessorsretainobjectsthatarenolongeraccessibleviatheproperties//thi