GNU bug report logs - #65159
30.0.50; pp-fill fails when symbol's lisp-indent-function is bigger than number of arguments

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stefan Kangas <stefankangas <at> gmail.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#65159: closed (30.0.50; pp-fill fails when symbol's
 lisp-indent-function is bigger than number of arguments)
Date: Fri, 08 Sep 2023 17:27:02 +0000

[Message part 1 (text/plain, inline)]

Your message dated Fri, 8 Sep 2023 10:26:28 -0700
with message-id <CADwFkmmxagGH-K32G4wrk--qT4p5GcMTMMgL-fR+QVEdKT5Ymg <at> mail.gmail.com>
and subject line Re: bug#65159: 30.0.50; pp-fill fails when symbol's lisp-indent-function is bigger than number of arguments
has caused the debbugs.gnu.org bug report #65159,
regarding 30.0.50; pp-fill fails when symbol's lisp-indent-function is bigger than number of arguments
to be marked as done.

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


-- 
65159: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=65159
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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

From: Ola x Nilsson <ola.x.nilsson <at> axis.com>
To: <bug-gnu-emacs <at> gnu.org>
Cc: Stefan Monnier <monnier <at> iro.umontreal.ca>
Subject: 30.0.50; pp-fill fails when symbol's lisp-indent-function is bigger
 than number of arguments
Date: Wed, 9 Aug 2023 00:08:54 +0200

The `pp-fill' function uses the symbol property `lisp-indent-function'
to insert line breaks in function calls.  If the property is an integer
larger than the actual number of arguments in the function call,
`forward-sexp' will eventually signal an error.

When the symbol property is `defun', `pp-fill' will assume this is
equivalent to the value 2 which will suffer the same problem.

This behaviour is also present in `lisp-data-mode' where it does not
really make sense to me to assume the first symbol in a list is a
function.

I triggered this problem when I tried to use pp-buffer in a
archive-contents file from GNU ELPA.  The entry for `kiwix' lists
`request' as a dependency.  As `request' is also a symbol with
`lisp-indent-function' set to `defun', `pp-fill' attempts to insert a
newline after the nonexistent ARG2 causing an error. 





In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.20, cairo version 1.16.0) of 2023-08-07 built on lap5cg80647hz
Repository revision: 18e7bc87521e3c48b819cfe4a113f532ba905561
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12013000
System Description: Ubuntu 20.04.6 LTS

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[Message part 3 (message/rfc822, inline)]

From: Stefan Kangas <stefankangas <at> gmail.com>
To: Ola x Nilsson <ola.x.nilsson <at> axis.com>
Cc: Stefan Monnier <monnier <at> iro.umontreal.ca>, 65159-done <at> debbugs.gnu.org
Subject: Re: bug#65159: 30.0.50; pp-fill fails when symbol's
 lisp-indent-function is bigger than number of arguments
Date: Fri, 8 Sep 2023 10:26:28 -0700

Ola x Nilsson <ola.x.nilsson <at> axis.com> writes:

> On Mon, Aug 14 2023, Stefan Monnier wrote:
>
>>> The `pp-fill' function uses the symbol property `lisp-indent-function'
>>> to insert line breaks in function calls.  If the property is an integer
>>> larger than the actual number of arguments in the function call,
>>> `forward-sexp' will eventually signal an error.
>>
>> I pushed a patch to `master` which should fix this problem.
>>
>
> Thanks, works fine for me now.

I'm therefore closing this bug report.

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