Crash trying to copy tuplet across barline
I don't expect it to succeed, but the crash happens just before we would have popped up an error message, a zero-dereference.
1) empty 4/4 score
2) in one measure, enter 6 Ctrl+3 c d e d c to enter a quarter note tripet (and two more notes just to fill out the measure)
3) in another measure, enter 5 c d e f
4) select the first measure, copy
5) click the f in the second measure, paste