bug#15661: 24.3.50; calendar.el broken

[Alan Mackenzie]

Andreas R?hler <andreas.roehler@easy-emacs.de> wrote:
> M-x diary-view-entries RET

> fails saying:

> Symbol's value as variable is void: displayed-month

> AFAIU reason is new defvar behavior, which breaks legacy code.

> calendar.el has a

> (defvar displayed-month)

> which doesn't longer intialise to nil.

I'm not sure it ever did.  At least as far back as Emacs 21, not
specifying an initial value leaves the variable unbound.

> There must be a lot of things be broken that way.

I think I agree with this, though, having fallen into this trap several
times.  ;-)

-- 
Alan Mackenzie (Nuremberg, Germany).