Re: using finalizers

[LdBeth]

>>>>> In <jwv35m94fqf.fsf-monnier+emacs@gnu.org> 
>>>>>   Stefan Monnier <monnier@iro.umontreal.ca> wrote:
Stefan> I don't think Scheme's `letrec` works any differently in this respect,
Stefan> except that instead of nil, variables get a special "void like" value
Stefan> before they're initialized.

Right. With that "void" like value, a sane Scheme would probably
signal error at runtime. The simple letrec subr.el macro does not do
that check.

Stefan> In the above code, the real bug I can see which we should fix is that
Stefan> `make-finalizer` should signal an error if its arg is not a function.

There's nothing wrong with the behavior of `make-finalizer`, it just
treats a symbol as a function specifier, just like elisp does not
doing anything to prevent a user from `fset' symbol `nil' and
`(funcall nil)'.

-- 
LDB