Steps to reproduce bug
1. Open demo score
2. Drag an "8va" line from the Lines palette to somewhere on the treble staff
3. Create > Instruments
4. Click on Staff 1, treble clef and Remove it
5. Press OK
MuseScore crashes
MuseScore version: r.2681
(Operating System: Windows XP)
Comments
Hopefully fixed in r2687
Automatically closed -- issue fixed for 2 weeks with no activity.