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: Ola x Nilsson <ola.x.nilsson <at> axis.com>
Subject: bug#65159: closed (Re: bug#65159: 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 bug report

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

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 65159 <at> debbugs.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: 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.

[Message part 3 (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

Configured using:
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