ssh:with-command does not work is remote connection is using a c shell

[timotheosh]

How to replicate

Connect to a remote host as a user who uses the c shell (or tcsh).

(flet ((read-lines (s)
  (loop for line = (read-line s nil nil)
        while line
        collect line)
      (ssh:with-connection (conn "julian" (ssh:agent "thawes"))
            (ssh:with-command (conn iostream "ls -al")
                      (read-lines iostream))))

Expected Behavior

Get a list of files.

What happens instead

The stream is empty (and still returns 0) but there is now a file on the remote host called 1 with the expected output (list of files).

I tried this with various shells and it seems to only happen if the remote shell is csh or a derivative of csh. I don't have this problem with any bourne compatible shells. /bin/sh bash and ksh all work as expected.