Re: non-nil not valid any more?

[Andreas Röhler]

On 11.06.20 20:10, Michael Heerdegen wrote:
> Andreas Röhler <andreas.roehler@easy-emacs.de> writes:
>
> > Hi,
> >
> > IIRC it was possible to write something like
> >
> > (if non-nil (message "%s" "Wahr")(message "%s" "Falsch"))
> >
> > Now get
> >
> > Debugger entered--Lisp error: (void-variable non-nil)
> Are you sure it wasn't quoted:
>
>    (if 'non-nil (message "%s" "Wahr")(message "%s" "Falsch"))
>
> or did you define the symbol `non-nil' as a variable (with a non-nil
> value)?  :non-nil would work, too.
>
> Michael.

Seems that was a long living mistake. As `t' is a common char, assumed 
in earlier lisp existed nil and non-nil as symbols for true and false.