OpenCV: Causing unhandled exception when extract ORB feature

I'm new on openCV. I'm working on feature matching. Currently, I would like to extract ORB feature using openCV. I searched example and guide line how to use ORB feature on openCV. I tried a very simple source code to extract ORB feature that I referred on the internet. But I don't know why it threw an unhandled exception with the message like "Unhandled exception at 0x1000AAD2 (Ldcnlib.dll) in motors.exe: 0xC0000005: Access violation writing location 0x00000025". It's often a kind of memory error. But I cannot find the reason out. Could anyone help me to find the solution to solve this error? The input image size is 240x98.

Source code:

#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>

#include "opencv2/features2d/features2d.hpp"
#include <vector>

using namespace cv;
using namespace std;

int main( int argc, char** argv )
{   
    Mat img_1 = imread("008_1.jpg",CV_LOAD_IMAGE_GRAYSCALE);
    if (!img_1.data){           
        cout << "error"<< endl;
        return -1;
    }

    // declare variables
    OrbFeatureDetector  detector;   
    vector<KeyPoint> kp1;
    Mat desc1;

    detector.detect(img_1,kp1);

    // to do more

    waitKey(0); // Wait for a keystroke in the window
    return 0;
}