When I press shift-cmd-d, which is correctly resolving to editor:duplicate-lines, it duplicates the entire buffer if I don’t have a line selected.
I realize there is an outstanding enhancement request to duplicate the current line if there is no selection, but this is an actual bug report. Duplicating the entire buffer is particularly bad since in larger buffers it doesn’t look like anything happened. You might hit it a couple of times and won’t know what’s wrong until later when things start acting weird in your browser or fail to compile. (Yes, I did that. Twice.)
Version 0.81.0, but I might have seen this in previous builds.