[m-rev.] for post-commit review: report on more kinds of coerce_fails

[Zoltan Somogyi]

On Mon, 27 Jul 2026 13:23:13 +0200 (CEST), "Zoltan Somogyi" <zoltan.somogyi at runbox.com> wrote:
> > > I can see three possible approaches.
> > > 
> > > - never use module qualification
> > > - always use module qualification
> > > - use module qualification only if any module qualification differs
> > >   between the from-type and the to-type. (Unlike a type_ctor, a full type
> > >   may contain more than one sym_name.)
> > > 
> > > I thin the third option is best in balancing the two concerns of
> > > 
> > > - presenting information when it can be helpful
> > > - not presenting information when it is not useful, but is only clutter.
> > > 
> > > What do you think?
> > 
> > That sounds okay.
> 
> I will do this soon.

This diff does that.

Zoltan.
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