On Jan 22, 2019 7:43 PM, Eli Zaretskii <eliz@gnu.org> wrote:

> Cc: karl@karlotness.com, 34114@debbugs.gnu.org, kaushal.modi@gmail.com
> From: Daniel Colascione <dancol@dancol.org>
> Date: Tue, 22 Jan 2019 17:41:34 -0800
>
> > What is special about frames that precludes them from being recorded
> > by the pdumper?
>
> Frames contain instance-specific state, and I don't think it makes sense
> to try to pretend that individual frames survive from one Emacs
> invocation to another.

Sorry, I still don't think I understand: what is that
instance-specific state, in terms of members of the frame object, or
its attributes?

A frame is always associated with a specific pty, specific X11 window, specific win32 window, etc. These concepts do not exist across different invocations of Emacs. I don't understand what you don't understand.