Запуск запроса на выборку CoreData [Any] в [AnyObject] вызывает утечку памяти

Я столкнулся с утечкой памяти, которая неспособна понять PFB

Трассировка вызовов:

• + 0x196 callq "DYLD-STUB $$ NSManagedObjectContext.fetch(NSFetchRequest) throws → [A]"
• + 0x8c callq "_arrayForceCast ([A]) → [B]"
• + 0xde callq "Collection.map((A.Iterator.Element) throws → A1) throws → [A1]"
• + 0x19e callq "ContiguousArray.reserveCapacity(Int) → ()"
• + 0xaa callq "_ContiguousArrayBuffer.init(uninitializedCount: Int, minimumCapacity: Int) → _ContiguousArrayBuffer"
• + 0x42 callq "ManagedBufferPointer.init(_uncheckedBufferClass: AnyObject.Type, minimumCapacity: Int) → ManagedBufferPointer"
• + 0x0f callq "swift_slowAlloc"
• + 0x04 callq "DYLD-STUB $$ malloc"
• + 0x13 callq "malloc_zone_malloc"
• + 0x8f movzbl 71543 (% rip),% eax

Edit:

Далее я исследовал код, и я узнал, что настоящая утечка возникает, когда я пытаюсь принудительно использовать тип литья [Any] для [AnyObject] в запросе на выборку coredata​​p >

func fetchEntity<T: NSManagedObject>(entityClass:T.Type,setPredicate:NSPredicate?) -> [AnyObject]
{
    let entityName = NSStringFromClass(entityClass)
    let fetchRequest:NSFetchRequest<NSFetchRequestResult> = NSFetchRequest(entityName: entityName)
    fetchRequest.predicate = setPredicate
    fetchRequest.returnsObjectsAsFaults = false

    var result:[AnyObject] = []
    do
    {
        result = try cdh.managedObjectContext.fetch(fetchRequest) --> right here is the leak, when i cast the return object of [Any] to [AnyObject]

    }catch let error as NSError
    {
        debugPrint("error in fetchrequest is",error)
        result = []
    }

    return result
}

EDIT: @Джон, Kuba

Model.getEntities(entityType: EX_TEACHER.self, completion: {[unowned self] entityobjects in
            self.teacherList = entityobjects
    })

//в классе модели

 class func getEntities<T: NSManagedObject>(entityType: T.Type,completion: ([AnyObject]) -> Void)
{
    let  teacherList = coreDataOperation.fetchEntity(entityClass: entityType, setPredicate: nil)

    completion(teacherList)

}

//cdh.managedObjectКонтактный код

lazy var cdh:CoreDataStore = {
    let cdh = CoreDataStore()
    return cdh
}()

class CoreDataStore: NSObject{
lazy var managedObjectContext: NSManagedObjectContext = {
    // Returns the managed object context for the application (which is already bound to the persistent store coordinator for the application.) This property is optional since there are legitimate error conditions that could cause the creation of the context to fail.
    let coordinator = self.persistentStoreCoordinator
    var managedObjectContext = NSManagedObjectContext(concurrencyType: .mainQueueConcurrencyType)
    managedObjectContext.persistentStoreCoordinator = coordinator
    return managedObjectContext
}() }

Ответы

        do
        {

        var result: AnyObject = try cdh.managedObjectContext.fetch(fetchRequest) 
       let resultMirror = Mirror(reflecting: result) 
       print(resultMirror.subjectType)    //gives you the return type  from coredata


        }catch let error as NSError
        {
            debugPrint("error in fetchrequest is",error)
            result = []
        }