bug#26486: 25.1.91; unused var warning from cconv.el can't be suppressed

["Basil L. Contovounesios" <contovob@tcd.ie>]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> Noam Postavsky <npostavs@users.sourceforge.net> writes:
>
>> This happens also without a macro.
>>
>> ;; -*- lexical-binding: t; byte-compile-warnings: nil  -*-
>> (with-no-warnings (let (unused)))
>
> This currently gives a warning about both an unused variable and an
> empty let body.
>
> The following seemingly straightforward patch fixes both these things,
> I'd appreciate it if somebody had a look over it first, though.  :-)
> (So Stefan M added to the CCs.)

I suspect this patch causes the following:

$ cat foo.el
;;; foo.el --- foo -*- lexical-binding: t -*-
(let ())
;;; foo.el ends here
$ emacs -Q -script foo.el
Eager macro-expansion failure: (void-function byte-compile-warning-enabled-p)

Thanks,

-- 
Basil