Hello all,

Sorry about the confusing subject line, it’s the best I could think of to 
succinctly summarize the issue at hand. I’ve been running into an issue with 
FreeBSD from 10.x to 12-CURRENT and wanted to check with the mailing list 
before I bugged it to make sure it is a FreeBSD bug and not a WSL (the new 
Linux subsystem for Windows) bug.

When I ssh into a FreeBSD host from a TERM=xterm-256color host that has no 
problem SSHing into Linux machines, the following behavior is observed 
(regardless of the $TERM value under FreeBSD or the SSH shell I’m logging into).

Imagine the prompt currently reads as follows with the cursor at the space 
denoted by _ in the text below:

user@freebsd % foo_bar

If I type in ` foo` at this point, the prompt now reads

user@freebsd %  foo foo_

However, the _actual_ contents of the prompt are really

user@freebsd % foo foo bar_

i.e. the _displayed_ prompt acted as if OVERWRITE were on, but the actual 
behavior is that INSERT was enabled. The actual behavior is the expected 
behavior, which is what the prompt should have shown.

I do not experience this behavior when using, say, Putty instead of OpenSSH 
under WSL. I also do not experience this behavior when SSHing into a 
non-FreeBSD host.

If this is not a FreeBSD bug, I’ll raise it with the WSL team who have proven 
to be very earnest in their attempts at fixing all compatibility issues via 
their GitHub presence.

(A screenshot of the observed behavior, if it helps: 
http://i.imgur.com/k6hVtbQ.png )

Thank you,

Mahmoud Al-Qudsi
NeoSmart Technologies
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