GNU bug report logs - #24912
25.1.50; Byte compiler generates incorrect code when second &optional is used

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Message #10 received at 24912-done <at> debbugs.gnu.org (full text, mbox):

From: Philipp Stephani <p.stephani2 <at> gmail.com>
To: 24912-done <at> debbugs.gnu.org
Subject: Re: bug#24912: 25.1.50; Byte compiler generates incorrect code when
 second &optional is used
Date: Tue, 22 Nov 2016 13:10:35 +0000

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Philipp Stephani <p.stephani2 <at> gmail.com> schrieb am Mi., 9. Nov. 2016 um
22:11 Uhr:

>
> emacs -Q
>
> In *scratch*, evaluate:
>
> (funcall
>  (let ((lexical-binding t))
>    (byte-compile
>     (lambda (&optional a b)
>       (list a b))))
>  'a 'b)
>
> Result is (a b), as expected.  Now evaluate
>
> (funcall
>  (let ((lexical-binding t))
>    (byte-compile
>     (lambda (&optional a &optional b)
>       (list a b))))
>  'a 'b)
>
> Result is (b nil).
>
> Emacs should either generate correct code in both cases, or signal an
> error in the latter case.
>
> Fixed with commit  0d913da15c094bf596dd685acecf3438228c15cf.

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