ios : memory file operator bool crash - ios

Question

I am using realmswift in my project, so as per apple guidelines I converted whole project into swift 4.2 and all pod libraries into latest version. Project is converted successfully but I get crash everytime when I run project.
I have uploaded screenshot for better understanding.
Now here is my model for inserting value in database
class SyncProductModel: Object, Mappable {
#objc dynamic var id: String?
#objc dynamic var productType : Int = 0
#objc dynamic var name: String?
#objc dynamic var category :String?
#objc dynamic var sku : String?
#objc dynamic var baseMOQ : Double = 0.0
#objc dynamic var isActive : Bool = false
#objc dynamic var isFavourite : Bool = false
#objc dynamic var createdAt : String?
#objc dynamic var updatedAt : String?
#objc dynamic var uom : String?
#objc dynamic var productDesc : String?
#objc dynamic var retailUOM : String?
#objc dynamic var isInCart : Bool = false
var isSelecetd = false
var attachments = List<AttachmentModel>()
var inventory = List<SyncInventoryModel>()
var inventoryModel : SyncInventoryModel?
// var tags = List<tags>()
// var baseProperties = List<baseProperties>()
required convenience init?(map: Map) {
self.init()
}
override class func primaryKey() -> String? {
return "id"
}
func mapping(map: Map) {
id <- map["id"]
productType <- map["type"]
name <- map["name"]
category <- map["category"]
sku <- map["sku"]
var baseQty : Any?
baseQty <- map["baseMOQ"]
baseMOQ = Utilities.getDoubleValue(value: baseQty)
isActive <- map["isActive"]
createdAt <- map["createdAt"]
updatedAt <- map["updatedAt"]
uom <- map["uom"]
productDesc <- map["description"]
retailUOM <- map["retailUOM"]
attachments <- (map["attachments"], ListTransform<AttachmentModel>())
// tags <- (map["attachments"], ListTransform<tags>())
// baseProperties <- (map["baseProperties"], ListTransform<baseProperties>())
}
Here is my code for inserting value into db
for obj in masterProduct
{
if self.realm.isInWriteTransaction {
self.realm.add(obj, update: true)
}
else {
try! self.realm.write {
// Here My application get crashed.
self.realm.add(obj, update: true)
}
}
}
But everytime application get crashed. Please help me I stuck here.
Any help would be appreciated.