bug#72141: 29.4; package-upgrade vs package-load-list

[Eli Zaretskii <eliz@gnu.org>]

> From: Thierry Volpiatto <thievol@posteo.net>
> Date: Tue, 16 Jul 2024 14:46:37 +0000
> 
> 
> I think there is a bug here, but please verify with following recipe as
> I don't use widely package installation, at least for myself.  When reading
> the code I believe it is reproductible as well on emacs-30+.
> 
> 1) Install package foo and bar.
> 2) Disable them in package-load-list ((foo nil) (bar nil) all).
> 3) Wait some time until foo and/or bar have new versions available.
> 4) Call package-upgrade-all.  It will call package-upgrade on foo
> and bar (and possibly others).  When package-upgrade find foo
> package it will (1) delete it and (2) call package-install which
> will refuse to install (error) because foo is disabled.
> 
> As a result we have lost foo package, it is now uninstalled.
> Same problem with M-x package-upgrade, foo and bar are listed in
> completion and made available whereas they are going to fail to
> upgrade.

Philip, any comments or suggestions?