bug#36649: 27.0.50; pure space and pdumper

[Eli Zaretskii]

> From: Robert Pluim <rpluim@gmail.com>
> Cc: pipcet@gmail.com,  eggert@cs.ucla.edu,  schwab@linux-m68k.org,
>   stefankangas@gmail.com,  36649@debbugs.gnu.org,  larsi@gnus.org,
>   akrl@sdf.org
> Date: Thu, 04 Mar 2021 17:42:56 +0100
> 
>     >> I think Emacs already assumes Qnil == 0, since there are places that
>     >> use ! to check for Qnil rather than using NILP.
> 
>     Eli> Those are bugs that need to be fixed.  Fast.
> 
> Hmm,
> 
> ./configure --enable-check-lisp-object-type
> 
> for emacs-master and emacs-27 builds fine, so maybe Iʼm imagining things.

"Imagination is more important than knowledge".  Albert Einstein.