Changing initial time signature in continuous view causes crash

1. My First Score
2. Go to continuous view
3. Drag & drop onto first measure or double click other time stamp from the pallette (i.e. 3/4)
Result: crash.

Windows 10 x64, 99c15fd

May be related to #175261: Dropping time signature from master palette onto measure will crash (which was related only to drag&drop) or even #174721: Cut a time signature before a glissando and toggle in another View causes a crash