SWIFT Thread 1: EXC Bad instruction XCODE IOS - ios

Question

I am very new to stackexchange so please let me know if i need to provide more information.
I tried to install the Corelocation and Mapkit and use them togheter. Every since i followed Vea Software Tutorial i have recived the following error:
Thread 1: EXC_BAD_INSTRUCTION(code=EXC_1386_INVOP,subcode=0x0)
In the compiler it says
fatal error: Unexpectedly found nil while unwrapping an Optional
Value(llDB)
The error is appering right at this line, but when i delete it, it appears at another Mapkit/Location core line. The error:
self.mapView.showsUserLocation = true
EDIT: When i remove the line above, the same error appears on
self.mapView.setRegion(region, animated: true)
I have been searching around for a while on the internet but nothing really helps me out. Thank you for your time.
If you need the whole viewcontroller code. Here it is.
import UIKit
import Parse
import CoreLocation
import MapKit
class ViewController: UIViewController, CLLocationManagerDelegate, MKMapViewDelegate {
#IBOutlet weak var mapView: MKMapView!
let locationManager = CLLocationManager()
#IBOutlet var UsernameTextField: UITextField!
#IBOutlet var PasswordTF: UITextField!
#IBOutlet var EmailTF: UITextField!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.locationManager.delegate = self
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest
self.locationManager.requestWhenInUseAuthorization()
self.locationManager.startUpdatingLocation()
self.mapView.showsUserLocation = true
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: - Location Delegate Methods
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
let location = locations.last
let center = CLLocationCoordinate2D(latitude: location!.coordinate.latitude, longitude: location!.coordinate.longitude)
let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 1, longitudeDelta: 1))
self.mapView.setRegion(region, animated: true)
self.locationManager.stopUpdatingLocation()
}
func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
print("Error:" + error.localizedDescription)
}
}

Answer 1

This just an hypothesis by I noticed you use
self.mapView.setRegion(region, animated: true)
in the CLLocationManager delegate and start updating before mapView is actually showing (i.e. in viewDidLoad).
Could it be that mapView is trying to update its visual states before being installed in the view hierarchy ?