pacman writes its errors to stderr, which the runner folds into the error rather than the output;
the stale-index classifier read the output alone and never saw a single 'failed retrieving file',
so a ten-week-old database on the control node reported as a wall of 404s from the mirrors. The
classifier now reads everything pacman said, knows a failed signature as the same staleness, tells a
mirror outage with a fresh database apart from it, and names the database's date and age beside the
remedy: a full upgrade by the operator, never a one-package sync, which on this distribution is a
partial upgrade. Whose job keeping the database current is stays issue 205's question.