• OpenCV => 3.4.3
• Operating System / Platform => Windows 64 Bit
• Compiler => Visual Studio 2015

Detailed description

I am trying test object_detection.py,
the bug happens when I run indices = cv.dnn.NMSBoxes(boxes, confidences, confThreshold, nmsThreshold)

the params are like:

• boxes: <class 'list'>: [[267, 43, 244, 161], [219, 63, 198, 204], [197, 56, 38, 89], [41, 71, 60, 175], [-3, 130, 62, 206], [177, 163, 101, 181]]
• confidences: <class 'list'>: [0.876075, 0.7604607, 0.9908975, 0.99148935, 0.6421119, 0.98622924]
• confThreshold = 0.5
• nmsThreshold = 0.4

Then I get the error: SystemError: <built-in function NMSBoxes> returned NULL without setting an error, so can anyone help me out ?