bug#46883: 28.0.50; calendar-holidays var setup errors

[adam]

I did but nothing new shows up.

Also while Emacs is running it brings to the front the *Warning* buffer 
with this calendar errors, as it probably continue try to initialize it.

On 2021-03-04 11:37, Lars Ingebrigtsen wrote:
> Adam Faryna <adam@faryna.io> writes:
>
> > The error I get it's actually a warning from *Warning* buffer, that
> > welcomes me every time I start Emacs since update. There are
> > no backtrace after I activate debug-on-error and restart.
>
> You may have to start Emacs with "emacs --debug-init" to get a 
> backtrace
> here.