bug#58857: 28.2; Emacs on macOS seg faults when deleting fullscreen frame

[Gerd Möllmann]

Po Lu <luangruo@yahoo.com> writes:

> Unfortunately, I can't make sense of that Apple mumbo jumbo, sorry.
> According to a web search, it occurs on iOS when two animations are run
> by the toolkit at the same time (which is probably the same on Mac OS.)
> I guess it's fine if it doesn't lead to crashes.

I'll holler if I find something out.