Ludovic Courtès <ludo@gnu.org> writes:

>> It would still be good with a better failure mode, but I'll file this
>> under "pebkac" for now.
>
> Yes, I’m surprised it ended up looping.  Did you try to strace it or
> something to see what was going on?  Perhaps guile failed to start
> altogether and Guile-SSH kept retrying?

Indeed.  Guile-SSH kept trying to start `guile --listen` over and over.