I am using OpenCV 4.1.1.
When I try to run the trackbar tutorial code, I get the segmentation fault (core dumped) error.
It seems that the crash occurs when the trackbar is created in an existing window initialized by cv2.namedWindow() and does not occur when the 2nd argument of cv2.createTrackBar(window name) is a name of a non-existent window.
Is it a bug with the latest release or is there some fault in my installation?
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