bug#23750: 25.0.95; bug in url-retrieve or json.el

[Eli Zaretskii]

> Cc: 23750@debbugs.gnu.org, monnier@IRO.UMontreal.CA, sdl.web@gmail.com
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Mon, 20 Jun 2016 23:27:01 +0300
> 
> On 06/20/2016 11:17 PM, Eli Zaretskii wrote:
> 
> > We can replace the call to multibyte-string-p with a comparison of
> > what 'length' and 'string-bytes' return.  That should overcome this
> > issue.
> 
> Why not just call string-to-unibyte?

Because (a) I don't want to see that function in our sources, ever,
and (b) you don't have any control on the error message it produces,
which is not appropriate for application-level checks.