bug#40968: 28.0.50; (apply nil)

[Stefan Monnier <monnier@iro.umontreal.ca>]

> as implying that (apply FUNCTION) is equivalent to (funcall FUNCTION)

I think the current half-broken semantics is a fairly
natural generalization:

    (apply ... ARGS)

is equivalent to

    (funcall ... ,@ARGS)

so when `...` is empty it means that

    (apply ARGS)

should be equivalent to

    (funcall ,@ARGS)
aka
    (apply (car ARGS) (cdr ARGS))

When ARGS is the empty list we should probably signal an error (just
like (apply (car ARGS) (cdr ARGS)) would, BTW).


        Stefan