Comment 2 for bug 1828707

there is no such ~/.ssh/known_hosts file exist.
I also try to create an empty one or copy a file with the same name from a 16.04 system, both turn to the same error message as above.

BTW, I find the log from 16.04 doesn't excute the code eval _ipset_known_hosts when trigger the auto completion
the log is like this https://paste.ubuntu.com/p/HHdD2DqQ7D/