exciting results! i wrapped up a similar invocation and threw it into my notcurses drone CI, and there i fail exactly as i do within the debian CI (i.e. we never terminate, though we don't soak the CPU).
https://drone.dsscaw.com:4443/dankamongmen/notcurses/10240/1/2 i ought now be able to resolve this quickly, as i finally seem able to reproduce it locally =].
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