Crash: clef popover I think

Just attaching a crash report for the team.

I invoked the clef popover, typed 8vb then enter, and Dorico promptly crashed.
Dorico_2017-12-08-173345_LNMBP.crash.zip (17.7 KB)

Addendum: I’m pretty sure that at the start of the selection there was already a clef change (from treble to bass). I’ve just reapplied the 8ba (having saved!) and it’s worked fine.