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Changes between Initial Version and Version 1 of Ticket #15277, comment 15

initial	v1
1	1	Curiously if the external screen is already connected and then ChimeraX is started on the iMac display, the file history is hidden, and the external screen is unplugged, then it does not crash. So maybe the key ingredients are that chimerax is running while a screen is plugged in and then a subsequent draw primes it to crash when the screen is later removed. So maybe the time to handle the problem is when the screen is added.
	2
	3	If ChimeraX is started with two displays, then the display is unplugged, no crash, then the display plugged back in, no crash, then the display unplugged and it crashes. So it does seem that the bug is happening when a display is added while ChimeraX is running, then it will crash on the next unplug.