Hi,

        This bug is still present in Emacs 25.0.94

        When trying to kill it via C-x C-c `save-buffers-kill-terminal'
        I just see the message:

get-device-terminal: Invalid argument #<terminal 9> in
'get-device-terminal'

        Neither "File->Quit" or "File->Delete Frame" from the menubar
        nor clicking on X to close the frame kills Emacs or closes
        its frame -- the Emacs frame remains on the screen.

        I'll be able to keep the process around for a little while
        (i.e. not kill it from the command line) if more info
        is reqested to dbug this.
        
        Thanks.