已调用CV_GET_SEQ_ELEM abort（）

Question

我收到错误：abort（）被称为

Mat M = cvarrToMat(img);
int n = features->total;
Point point;
for (int i = 0; i < n; i++)
{
    point = *CV_GET_SEQ_ELEM(Point, features, i);
    circle(M, point, 2, Scalar(0, 0, 255));
}