bug#37840: Missing in the Emacs manuals:

[Eli Zaretskii]

> From: martin rudalics <rudalics@gmx.at>
> Date: Sun, 10 Nov 2019 19:33:17 +0100
> Cc: 37840@debbugs.gnu.org, Juri Linkov <juri@linkov.net>
> 
> The speedbar code uses 'switch-to-buffer' internally to switch to
> its own buffer in its own window on its own frame.  Any
> customization of 'switch-to-buffer' to do something like switch to
> _any_ buffer in another frame will make the speedbar choke because
> its buffer won't be displayed in the same window where it expects
> it.

That seems unfortunate.  Can we somehow make Speedbar insulated from
the switch-to-buffer customizations?