Vim + Tmux: Resetting tmux tab name when exiting vim

Question

I'm labeling my Tmux tabs with the current file in vim like so:

autocmd BufEnter * let &titlestring = ' ' . expand("%:t")
set title
set t_ts=k

Then I have a VimLeave autocmd to have tmux rename the tab when I exit:

autocmd VimLeave * call system("tmux setw automatic-rename")

However, when I exit vim, the tab is renamed to "Thanks for flying Vim"

Any ideas how to fix this?

Answer 1

'titleold'      string  (default "Thanks for flying Vim")
                global

    This option will be used for the window title when exiting Vim if the
    original title cannot be restored.  Only happens if 'title' is on or
    'titlestring' is not empty.

So

autocmd VimLeave * set notitle

should fix it.