GNU bug report logs - #30301
26.0.91; setting lexical-binding with C-M-x vs M-x eval-buffer

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Package: emacs;

Reported by: charles <at> aurox.ch (Charles A. Roelli)

Date: Wed, 31 Jan 2018 10:35:01 UTC

Severity: normal

Tags: confirmed, fixed

Found in version 26.0.91

Fixed in version 27.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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Report forwarded to bug-gnu-emacs <at> gnu.org:
bug#30301; Package emacs. (Wed, 31 Jan 2018 10:35:02 GMT) Full text and rfc822 format available.
Acknowledgement sent to charles <at> aurox.ch (Charles A. Roelli):
New bug report received and forwarded. Copy sent to bug-gnu-emacs <at> gnu.org. (Wed, 31 Jan 2018 10:35:02 GMT) Full text and rfc822 format available.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: charles <at> aurox.ch (Charles A. Roelli)
To: bug-gnu-emacs <at> gnu.org
Subject: 26.0.91; setting lexical-binding with C-M-x vs M-x eval-buffer
Date: Wed, 31 Jan 2018 11:41:45 +0100

From the *scratch* buffer in emacs -q, type:

(setq-local lexical-binding t) M-x eval-buffer RET

Afterwards, M-: lexical-binding RET shows "nil", but I expect to see
"t".

If you instead type C-M-x in *scratch*, then M-: lexical-binding RET
does show "t".

For recent discussion also see Bug#30078, which is about turning on
lexical-binding in M-: (eval-expression) -- a different but related
issue.
Added tag(s) confirmed. Request was from Noam Postavsky <npostavs <at> users.sourceforge.net> to control <at> debbugs.gnu.org. (Wed, 31 Jan 2018 11:25:02 GMT) Full text and rfc822 format available.
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#30301; Package emacs. (Wed, 09 Oct 2019 21:32:01 GMT) Full text and rfc822 format available.

Message #10 received at 30301 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: charles <at> aurox.ch (Charles A. Roelli)
Cc: 30301 <at> debbugs.gnu.org
Subject: Re: bug#30301: 26.0.91; setting lexical-binding with C-M-x vs M-x
 eval-buffer
Date: Wed, 09 Oct 2019 23:31:23 +0200

charles <at> aurox.ch (Charles A. Roelli) writes:

>>From the *scratch* buffer in emacs -q, type:
>
> (setq-local lexical-binding t) M-x eval-buffer RET
>
> Afterwards, M-: lexical-binding RET shows "nil", but I expect to see
> "t".
>
> If you instead type C-M-x in *scratch*, then M-: lexical-binding RET
> does show "t".

This is how eval-buffer is meant to work -- it'll ignore any setting of
lexical-binding and just looks for

  -*- lexical-binding: t -*-

cookies and uses that instead.  This wasn't documented, though, but that
has been fixed on the trunk now.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no
Added tag(s) fixed. Request was from Lars Ingebrigtsen <larsi <at> gnus.org> to control <at> debbugs.gnu.org. (Wed, 09 Oct 2019 21:32:02 GMT) Full text and rfc822 format available.
bug marked as fixed in version 27.1, send any further explanations to 30301 <at> debbugs.gnu.org and charles <at> aurox.ch (Charles A. Roelli) Request was from Lars Ingebrigtsen <larsi <at> gnus.org> to control <at> debbugs.gnu.org. (Wed, 09 Oct 2019 21:32:04 GMT) Full text and rfc822 format available.
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Thu, 07 Nov 2019 12:24:04 GMT) Full text and rfc822 format available.
This bug report was last modified 4 years and 172 days ago.

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