bug#45443: 28.0.50; Can't find definition of compilation--message->loc

[Eli Zaretskii]

> From: Andrea Corallo <akrl@sdf.org>
> Cc: Daniel Martín <mardani29@yahoo.es>,  rms@gnu.org,
>   45443@debbugs.gnu.org
> Date: Sun, 27 Dec 2020 17:59:09 +0000
> 
> > Why do we need to expand macros? isn't it enough to find the defstruct
> > itself, by looking for a partial match?
> 
> I haven't look at the patch, but I think the approach of macro expanding
> is more general as should be able to track any function definition that
> is synthesized by any macro.

It is also more expensive and complicated.