error building emacs due to ctl-x-6-map

[Eric S Fraga]

Hello,

I have just updated emacs from git and tried building [1] and I get the
following error:

--8<---------------cut here---------------start------------->8---
make[2]: Leaving directory '/home/ucecesf/git/emacs/lisp'
cp -f temacs bootstrap-emacs
rm -f bootstrap-emacs.pdmp
./temacs --batch  -l loadup --temacs=pbootstrap
Loading loadup.el (source)...
[...]
Loading /home/ucecesf/git/emacs/lisp/loaddefs.el (source)...
Symbol’s value as variable is void: ctl-x-6-map
make[1]: *** [Makefile:817: bootstrap-emacs.pdmp] Error 255
--8<---------------cut here---------------end--------------->8---

Thanks,
eric

Footnotes:
[1] because doc-view is not working properly, flashing repeatedly with
     some comment about pdf->png being killed, so hoping that a more
     recent version works properly.

-- 
Eric S Fraga via Emacs 27.0.50 & org 9.2.6 on Debian bullseye/sid