bug#38034: 26.3; wrong-type-argument plistp "" (org-caldav, url-dav)

[Nuno Pedrosa]

How or where do I check the value of `tree? (noob here, sorry!)

On Sun, Nov 03, 2019 at 03:57:13PM +0100 or thereabouts, Lars Ingebrigtsen 
wrote:
> 
> Nuno Pedrosa <info@nunopedrosa.net> writes:
> 
> > Debugger entered--Lisp error: (wrong-type-argument plistp "")
> > plist-put("" DAV:status 404)
> > url-dav-process-response(#<killed buffer>
> 
> The backtrace is hard to read as it's posted as HTML, but I think this
> must mean that the error is here:
> 
>       (let ((properties (url-dav-dispatch-node (car tree))))
>       ;; We need to make sure we have a DAV:status node in there for
>       ;; higher-level code;
>       (setq properties (plist-put properties 'DAV:status overall-status))
>       ;; Make this look like a DAV:multistatus parse tree so that
>       ;; nobody but us needs to know the difference.
>       (list (cons url properties))))))
> 
> What's the value of `tree' when you get this backtrace?
> 
> --
> (domestic pets only, the antidote for overdose, milk.)
>    bloggy blog: http://lars.ingebrigtsen.no