mutated lines: 1
exit=1
stdout bytes: 0
stderr, home shown as ~:
file://~/darkwing-scratch/r54b/tmp/e12/packages/webui/src/queue-read.mjs:18
  const refused = err instanceof QueueError;
                      ^

TypeError: Right-hand side of 'instanceof' is not an object
    at file://~/darkwing-scratch/r54b/tmp/e12/packages/webui/src/queue-read.mjs:18:23
