On Wed, Nov 1, 2017 at 9:40 AM Kaushal Modi <kaushal.modi@gmail.com> wrote:

> So need to figure out what could cause that client parameter to be set to
> "Unprintable entity".
>

This is the further I good go in elisp land:

Evaluating:

  (pp (frame-parameters (car (frame-list))))

gives (after removing buffer-list, buried-buffers-list, environment forms):

"((parent-id . 20506031)
 (outer-window-id . \"52429003\")
 (window-id . \"52429034\")
 (top . 0)
 (left . 2560)
 (width . 282)
 (height . 67)
 (name . \"emacs [emacs-26]   *scratch-emacs-lisp-mode**\")
 (fullscreen-restore)
 (explicit-name)
 (icon-name)
 (unsplittable)
 (modeline . t)
 (frameset--mini t . t)
 (frameset--id . \"D44A-14E2-2416-0AA9\")
 (display . \":1.0\")
 (tty . \"/dev/pts/10\")
 (tty-type . \"xterm-24bits\")
 (sticky)
 (cursor-color . \"white\")
 (background-mode . dark)
 (display-type . color)
 (client . \"Unprintable entity\")
 (z-group)
 (skip-taskbar)
 (visibility . t)
 (fullscreen)
 (no-accept-focus)
 (no-focus-on-map)
 (alpha)
 (scroll-bar-height . 0)
 (scroll-bar-width . 0)
 (cursor-type . box)
 (auto-lower)
 (auto-raise)
 (icon-type . t)
 (inhibit-double-buffering)
 (tool-bar-position . top)
 (wait-for-wm . t)
 (title)
 (buffer-predicate)
 (tool-bar-lines . 0)
 (menu-bar-lines . 0)
 (scroll-bar-background)
 (scroll-bar-foreground)
 (no-special-glyphs)
 (right-fringe . 8)
 (left-fringe . 8)
 (line-spacing)
 (screen-gamma)
 (border-color . \"black\")
 (mouse-color . \"black\")
 (background-color . \"#282828\")
 (foreground-color . \"#f7f7f7\")
 (horizontal-scroll-bars)
 (vertical-scroll-bars)
 (bottom-divider-width . 0)
 (right-divider-width . 1)
 (internal-border-width . 0)
 (border-width . 0)
 (font-parameter .
\"-unknown-PragmataPro-normal-normal-normal-*-18-*-*-*-*-0-iso10646-1\")
 (font .
\"-unknown-PragmataPro-normal-normal-normal-*-18-*-*-*-*-0-iso10646-1\")
 (font-backend xft x)
 (override-redirect)
 (undecorated)
 (parent-frame)
 (minibuffer . t))
"

Now frame-parameters is a C function and somehow derives the client
parameter to be "Unprintable entity". Let me know how I can further debug
this.
-- 

Kaushal Modi