Hi Leo, Leo Famulari skribis: > Running suspendable-ports.test > UNRESOLVED: suspendable-ports.test: non-revealed port is closed > ERROR: suspendable-ports.test: revealed port fdes not closed - arguments: ((system-error "seek" "~A" ("Bad file descriptor") (9))) I can’t seem to reproduce it in the Guile build tree, neither with: while ./check-guile suspendable-ports.test ; do : ; done nor with: while ./check-guile ; do : ; done We’ll have to try to gather more info if it comes up again, or see if there are configs that trigger it more easily. Thanks, Ludo’.