.MTS files from my Panasonic camcorder open fine in the source player but dragging to the timeline causes Shotcut 18.06 to abruptly close.
Fine in earlier versions up to 18.03 (I skipped until 18.06)
I have plenty of MTS files from a variety of cameras. It is the very common AVCHD format. My samples all work fine. There is an item on the road map (used to be?) to run a quick test on every newly opened file in a separate child process to prevent crashes like this. It will be coming with the forthcoming media library feature that reaps the metadata from the file in the same stroke.