The signal handler that seems to have been the cause of this issue was
removed in upstream commit 292f83b02f32c55b38ba685346e3f114c3f6b724
(https://gitlab.com/graphviz/graphviz/-/commit/292f83b02f32c55b38ba685346e3f114c3f6b724).
This landed in Graphviz 8.0.5.
