bug#66022: 30.0.50; kmacro overwriting global keybindings

[Eli Zaretskii]

> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Cc: Stefan Monnier <monnier@iro.umontreal.ca>,  66022@debbugs.gnu.org
> Date: Sun, 17 Sep 2023 08:40:06 +0200
> 
> I'm using use-package (+ straight) in my init.el, and because of that
> the bindings are done, behind the scenes, with bind-key.  The
> use-package binding f2 looks like (stripped down):
> 
>   (use-package emacs
>     :bind
>     ;; FIXME: The function key bindings sometimes mysteriously
>     ;; disappear, and are replaced with the original bindings in
>     ;; global-map.
>     ("<f2>" . mode-line-other-buffer))

What does use-package do when the "package" is "emacs"?  IOW, at what
point in time will the above binding be executed, and what event will
trigger that?