Reconstructed from the source twice now, which is 04-ISSUES/005 in its
own README: a test whose artifact was not pointed at skips rather than
fails, so an unset variable is a green run that proved nothing. The
first attempt today reported "skipped 24" and left a receipt claiming
zero of everything — working exactly as designed, and indistinguishable
at a glance from a suite that had nothing to do.
Also records the two things that cost time either side of it: `check`
says which variables are missing before a long run rather than skipping
quietly, and a heredoc into `newgrp` runs the suite as a child of a
shell that immediately exits, so it needs `setsid nohup … &` or it dies
with the shell that launched it.