On 27.08.19 11:44, Ludovic Courtès wrote: > This backtrace is not from current master (there’s now a new (guix lint) > module.) Could you post the backtrace for master? Backtrace on master (d78bc23411): guix lint --checkers=refresh hello Backtrace:ello@2.10 [refresh]... 9 (apply-smob/1 #) In ice-9/boot-9.scm: 705:2 8 (call-with-prompt _ _ #) In ice-9/eval.scm: 619:8 7 (_ #(#(#))) In guix/ui.scm: 1692:12 6 (run-guix-command _ . _) In srfi/srfi-1.scm: 640:9 5 (for-each # …) In guix/scripts/lint.scm: 57:4 4 (run-checkers # …) In srfi/srfi-1.scm: 640:9 3 (for-each # …) In guix/scripts/lint.scm: 64:17 2 (_ _) In guix/lint.scm: 1010:2 1 (check-for-updates #) In ice-9/boot-9.scm: 829:9 0 (catch srfi-34 # …) ice-9/boot-9.scm:829:9: In procedure catch: Wrong type to apply: #f It's slightly different then on 1.0.1 (now at guix/lint.scm), but the error seems to be the same.