bug#30489: 26.0.91; [PATCH] Data associated with json-readtable-error not a list

[Eli Zaretskii]

> From: Noam Postavsky <npostavs@gmail.com>
> Date: Thu, 15 Mar 2018 22:39:18 -0400
> Cc: 30489@debbugs.gnu.org
> 
> "Basil L. Contovounesios" <contovob@tcd.ie> writes:
> 
> > -    `(cond ,@res (t (signal 'json-readtable-error ,char)))))
> > +    `(cond ,@res (t (signal 'json-readtable-error ,(list char))))))
> 
> > When signalling json-readtable-error, the macro json-readtable-dispatch
> > passes the unrecognised character as error data verbatim, rather than as
> > a list.  Attached is a patch which fixes this.
> 
> Should this be applied to emacs-26?  It seems to fix a regression
> relative to Emacs 25 (where this error just had `nil' as the data) and
> the patch looks safe enough.

What change(s) introduced the regression?