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: No Wayman <iarchivedmywholelife <at> gmail.com>
Subject: bug#69168: closed (Re: bug#69168: [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 bug report

#69168: [BUG] 30.0.50; pp-emacs-lisp-code produces invalid elisp for backquoted forms

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 69168 <at> debbugs.gnu.org.

-- 
69168: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=69168
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

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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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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