Copy previous result at failure

[JinDouer]

In 'run_tracker.py' , if the tracker lose the target in a frame(all sample scores are negative), you still update the target location. Shouldn't the target be locked at the previous location if all sample scores are negative?
if not success:
target_bbox = result[i-1]
bbreg_bbox = result_bb[i-1]
Thank you for you answer?

[nhseob]

The tracker sometimes underestimates the target score (i.e. tracking succeed, but score < 0), in which we still need to update the target location not to miss the target.
I have actually tried with the lines you suggested, but the overall performance slightly got worse.