drag event in instrument list causes crash
1) Open instruments for a score with more than one instrument.
2) Dont select any staff, or select any other staff
3) try to click and drag the mouse simuntaneously.
Easiest is to just click visible while moving mouse. That should crash immediately.
Crash output is a qassert:
instrwidget.cpp:unknown: ASSERT: "partiturList->currentItem() == item" in file MuseScore/mscore/instrwidget.cpp, line 509