Program: 10414
Project: 10414
Buggy source:
@Override public void viewDidLoad(){
  super.viewDidLoad();
  locationManager=new CLLocationManager();
  if (Foundation.getMajorSystemVersion() >= 8) {
    locationManager.requestAlwaysAuthorization();
  }
  locationManager.setDelegate(new CLLocationManagerDelegateAdapter(){
    @Override public void didFail(    CLLocationManager manager,    NSError error){
      System.err.println("String_Node_Str" + error);
    }
    @Override public void didUpdateToLocation(    CLLocationManager manager,    CLLocation newLocation,    CLLocation oldLocation){
      System.err.println(String.format("String_Node_Str",newLocation,oldLocation));
      if (oldLocation == null) {
        MKCoordinateRegion userLocation=new MKCoordinateRegion(newLocation.getCoordinate(),1500,1500);
        regionsMapView.setRegion(userLocation,true);
      }
    }
    @Override public void didEnterRegion(    CLLocationManager manager,    CLRegion region){
      String event=String.format("String_Node_Str",region.getIdentifier(),NSDate.now());
      update(event);
    }
    @Override public void didExitRegion(    CLLocationManager manager,    CLRegion region){
      String event=String.format("String_Node_Str",region.getIdentifier(),NSDate.now());
      update(event);
    }
    @Override public void monitoringDidFail(    CLLocationManager manager,    CLRegion region,    NSError error){
      String event=String.format("String_Node_Str",region.getIdentifier(),error);
      update(event);
    }
  }
);
  locationManager.setDistanceFilter(CLLocationAccuracy.HundredMeters);
  locationManager.setDesiredAccuracy(CLLocationAccuracy.Best);
  locationManager.startUpdatingLocation();
}

Fixed version (ground truth):
@Override public void viewDidLoad(){
  super.viewDidLoad();
  locationManager=new CLLocationManager();
  if (Foundation.getMajorSystemVersion() >= 8) {
    locationManager.requestAlwaysAuthorization();
  }
  locationManager.setDelegate(new CLLocationManagerDelegateAdapter(){
    private CLLocation oldLocation;
    @Override public void didFail(    CLLocationManager manager,    NSError error){
      System.err.println("String_Node_Str" + error);
    }
    @Override public void didUpdateLocations(    CLLocationManager manager,    NSArray<CLLocation> locations){
      CLLocation newLocation=locations.last();
      System.err.println(String.format("String_Node_Str",newLocation,oldLocation));
      if (oldLocation == null) {
        MKCoordinateRegion userLocation=new MKCoordinateRegion(newLocation.getCoordinate(),1500,1500);
        regionsMapView.setRegion(userLocation,true);
      }
    }
    @Override public void didEnterRegion(    CLLocationManager manager,    CLRegion region){
      String event=String.format("String_Node_Str",region.getIdentifier(),NSDate.now());
      update(event);
    }
    @Override public void didExitRegion(    CLLocationManager manager,    CLRegion region){
      String event=String.format("String_Node_Str",region.getIdentifier(),NSDate.now());
      update(event);
    }
    @Override public void monitoringDidFail(    CLLocationManager manager,    CLRegion region,    NSError error){
      String event=String.format("String_Node_Str",region.getIdentifier(),error);
      update(event);
    }
  }
);
  locationManager.setDistanceFilter(CLLocationAccuracy.HundredMeters);
  locationManager.setDesiredAccuracy(CLLocationAccuracy.Best);
  locationManager.startUpdatingLocation();
}