Crashing marking instruments invisible with hide empty staves enabled
Go to instruments, uncheck 'visible' flag on everything but the horns, hit okay, crash.
It doesn't crash if you only uncheck one instrument, or even the entire first page of instruments. You have to uncheck most of them.
I was trying to eyeball where I needed to put cues without messing with the currently crash-happy parts by making nothing but a single stave visible, if you're wondering why someone might do this.