kernel messages with 1.3.99: Attempt to open closing tty cua0. / Ack!!!! This should never happen!!

lilo (
Thu, 9 May 1996 16:09:19 -0500 (CDT)

I've been getting the above two kernel messages trying to start dip against
/dev/cua0 after a fairly normal shutdown (power off to the modem and
subsequent SIGHUP to dip process as session leader)

I don't seem to be able to reset the serial device. I'll keep trying.