Well, we have seen this in nxagent and added a check to prevent it: https://github.com/ArcticaProject/nx-libs/commit/148eda36d486c0af019267a644c08d5e8c2f4f8b

Judging from the bug report you linked this fix is more a workaround for another problem happening before. Will reopen the nx-libs issue...

Orion Poplawski <orion@nwra.com> schrieb am Di., 14. Jan. 2020, 04:50:
This was filed against Fedora:
https://bugzilla.redhat.com/show_bug.cgi?id=1790606

And this X11 report seems relevant:
https://gitlab.freedesktop.org/xorg/xserver/issues/283

--
Orion Poplawski
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NWRA, Boulder/CoRA Office             FAX: 303-415-9702
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