Floating point Exception (core dumped) when running trainhog.cpp from Opencv

Question

Hello, I am developing a solution for object detection in an image, using HOG+SVM. So far I have only set up my database of positive and negative samples.

I was using the sample code of Opencv trainghog.cpp, just entered my parameters as below:

const char* keys =
    {
        "{help h|     | show help message}"
        "{pd    |../../amostras/positivas| path of directory contains possitive images}"
        "{nd    |../../amostras/negativas| path of directory contains negative images}"
        "{td    |../../testes| path of directory contains test images}"
        "{tv    |     | test video file name}"
        "{dw    |64| width of the detector}"
        "{dh    |64| height of the detector}"
        "{d     |false| train twice}"
        "{t     |false| test a trained detector}"
        "{v     |true| visualize training steps}"
        "{fn    || file name of trained SVM}"
    };

I have not changed any other line in the code. Positive images are read, when it is the turn of negative images, this appears:

Does anyone know what this mistake could be?

As suggested, here is the link that contains the example code: https://github.com/opencv/opencv/blob/master/samples/cpp/train_HOG.cpp