GNU bug report logs - #64294
30.0.50; setf strange when lexical-binding is nil

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Katsumi Yamaoka <yamaokac <at> detroit.hostforweb.net>
Subject: bug#64294: closed (Re: bug#64294: 30.0.50; setf strange when
 lexical-binding is nil)
Date: Mon, 26 Jun 2023 07:42:01 +0000

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Your bug report

#64294: 30.0.50; setf strange when lexical-binding is nil

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 64294 <at> debbugs.gnu.org.

-- 
64294: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=64294
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Katsumi Yamaoka <yamaoka <at> jpl.org>
To: 64294-done <at> debbugs.gnu.org
Subject: Re: bug#64294: 30.0.50; setf strange when lexical-binding is nil
Date: Mon, 26 Jun 2023 16:41:25 +0900

Duplicate.  Sorry for the noise.

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From: Katsumi Yamaoka <yamaokac <at> detroit.hostforweb.net>
To: bug-gnu-emacs <at> gnu.org
Subject: 30.0.50; setf strange when lexical-binding is nil
Date: Mon, 26 Jun 2023 09:40:58 +0900

Hi,

In the *scratch* buffer:

(setq lexical-binding nil)
(require 'nnheader)
(macroexpand '(setf (mail-header-date header) date))
 => (let* ((v #'(lambda (cl-x) (progn (progn (aref cl-x 3)))))
           (v header))
      (\(setf\ funcall\) date v v))

This looks broken, though it gets normal if lexical-binding is t.
Because of this, an old ELisp module doesn't work.  In addition,
the funny portion is replased with
\(setf\ internal--with-suppressed-warnings\)...
if the code is byte-compiled.

Thanks.

In GNU Emacs 30.0.50 (build 1, x86_64-pc-cygwin, GTK+ Version
 3.22.28, cairo version 1.17.4) of 2023-06-26 built on localhost

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