Godot often crashes at random on X11

The Godot editor or Godot games often crash at random on Linux due to an open X11 bug:

Rémi Verschelde @akien:

Hello, Godot maintainer here. We still get regular bug reports about this, and this doesn’t seem to be fixed in latest libX11 1.8.9.

Every version since 1.8.3 seems to have exposed new random threading related crashes.

This issue can be worked around by downgrading libx11 to version 1.8.2-1.

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