bug#54367: 29.0.50; error on "M-x list-package"

[Pankaj Jangid]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Do you have a package that refers to that variable (without requiring
> mm-decode first)?

Emacs works fine with a fresh ".emacs.d" directory. I created a new
~/.emacs.d and then copied my init.el into it. With just this emacs
works fine.

Probably some package has gone rogue in my older emacs.d.

Need to find out.