Copy and paste empty measures with different time signatures and in a certain order causes a crash

Nigthly October 23 (fc3ea8e)/ Windows7

1 Reproduce exactly the following sequence. From "My first score"

2 Copy and paste on the following measure, or one of the followings

Result: crash

Additional notes

-If you copy and paste the same sequence after filling the measures, there is no crash.

- If you copy and paste the first six measures (so, not with the 9/8), there is no crash

- If you keep this 9/8 measure, but remove (Ctrl + Del.) the second empty measure , there is no
crash. But if you insert a new measure 2 (the second in the score), then again there is a crash.

- If you keep the same sequence of time signatures, but replace the last 9/8 measure (by 3/4, 6/8, C, or whatever, I think I made the detail), then there is no crash.

So it seems that only this 9/8 timesig or measure (in this sequence) is involved. Strange, is not it?

And if you add in this sequence a new timesig (e.g. 3/4) after 9/8, there is no crash!

So it's really a case particularly difficult, tricky, and it is not certain at all that it shall verified and reproduced in real life (of MuseScore)! But we had to report it.

Maybe there has a "minimal" crash, but I have not found yet.