GNU bug report logs - #69168
[BUG] 30.0.50; pp-emacs-lisp-code produces invalid elisp for backquoted forms

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Michael Heerdegen <michael_heerdegen <at> web.de>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#69168: closed ([BUG] 30.0.50; pp-emacs-lisp-code produces
 invalid elisp for backquoted forms)
Date: Mon, 11 Mar 2024 04:49:02 +0000

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Your message dated Mon, 11 Mar 2024 05:48:30 +0100
with message-id <87msr5jrvl.fsf <at> web.de>
and subject line Re: bug#69168: [BUG] 30.0.50; pp-emacs-lisp-code produces invalid elisp for backquoted forms
has caused the debbugs.gnu.org bug report #69168,
regarding [BUG] 30.0.50; pp-emacs-lisp-code produces invalid elisp for backquoted forms
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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69168: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=69168
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From: No Wayman <iarchivedmywholelife <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: [BUG] 30.0.50; pp-emacs-lisp-code produces invalid elisp for
 backquoted forms
Date: Thu, 15 Feb 2024 14:19:19 -0500

Observe the output of the following two expressions:


(eval (read (with-temp-buffer
             (pp-emacs-lisp-code '`(1+ ,(1+ 1)))
             (buffer-string)))
     t)

;; => eval: Invalid function: `(1+ (,(1+ 1)))

(eval
(read (with-temp-buffer
        (insert (pp-to-string '`(1+ ,(1+ 1))))
        (buffer-string)))
t)

;; => (1+ 2)


The form returned by pp-emacs-lisp-code is:

(` (1+ (, (1+ 1))))

The backqoute and comma are not escaped, resulting in the error.
It looks like the logic in pp--insert-lisp would need to be 
extended to account for backquoting constructs.

In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.41, cairo version 1.18.0) of 2024-02-03 built on laptop
Repository revision: 4ebded3f5ee8617ac6b1debaa01706cd78206f39
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 
11.0.12101011
System Description: Arch Linux

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From: Michael Heerdegen <michael_heerdegen <at> web.de>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: iarchivedmywholelife <at> gmail.com, monnier <at> iro.umontreal.ca,
 Drew Adams <drew.adams <at> oracle.com>, 69168-done <at> debbugs.gnu.org
Subject: Re: bug#69168: [BUG] 30.0.50; pp-emacs-lisp-code produces invalid
 elisp for backquoted forms
Date: Mon, 11 Mar 2024 05:48:30 +0100

Eli Zaretskii <eliz <at> gnu.org> writes:

> I suggest
>
>   Does SEXP have a form like (ELT... . ,X) ?

Done, thanks.  Along with Drew's correction.

I have pushed both commits to master and close this report.


Michael.

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