- 
    
Bug
 - 
    Resolution: Unresolved
 - 
    
P3: Somewhat important
 - 
    None
 - 
    Qt Creator 14.0.0-rc1
 
I don't know exactly what may have caused it, but I played a bit around with the QuickToolBar inside some qml file (some pretty easy stuff, with a rectangle and some animation of this..)
But I also did more other stuff - so, not sure what really caused the crash on close...
see also attached backtrace