bug#60423: 29.0.60; goto-address and shr/textsec don't play nicely together

[Eli Zaretskii <eliz@gnu.org>]

> From: Mike Kupfer <kupfer@rawbw.com>
> cc: Eli Zaretskii <eliz@gnu.org>, 60423@debbugs.gnu.org,
>         stefankangas@gmail.com
> Comments: In-reply-to Stefan Monnier <monnier@iro.umontreal.ca>
>    message dated "Sat, 12 Oct 2024 19:13:49 -0400."
> Date: Wed, 16 Oct 2024 14:52:49 -0700
> 
> Stefan Monnier wrote:
> 
> > In this case the problem is that two packages compete for the same URL.
> > I think it makes sense for goto-address to "leave text alone" in this
> > case, but the question remains of how to detect *this* situation.
> > 
> > The underlying text having a `face` property doesn't seem sufficient
> > (especially since multiple `face` properties get merged, so the
> > conflict is less severe).
> > Maybe it should check for the presence of `help-echo and (follow-link
> > or keymap)`?  And make sure the those properties cover exactly the same
> > chunk of text?
> 
> As far as covering the same chunk of text, I'll need to play with this
> some more to see what works.  shr-tag-a inserts a warning emoji with a
> help-echo property, which goto-address somehow manages to clobber.  That
> warning emoji is not something goto-address would normally be looking
> for.

Ping!  How can we make some progress with this bug report?