In Windows the WIN+SHIFT+Arrow key combination will shift a window from one screen to another on multimonitor systems.
I shifted L5 from the center to my right hand screen on accident ("wrong" window was active - L5 instead of something else).
I immediately tried to shift the window back but forgot to press SHIFT which resulted in L5 taking the left 1/2 of the right hand screen, a corrected press of the full combination should have brought L5 back to center, but it crashed complaining in the log that: "width and height must be non-negative."
Logs attached.
