GNU bug report logs - #79128
31.0.50; shortdoc doesn't always display the correct arglist

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#79128: closed (31.0.50; shortdoc doesn't always display the
 correct arglist)
Date: Sat, 09 Aug 2025 12:47:02 +0000

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Your message dated Sat, 09 Aug 2025 15:46:29 +0300
with message-id <86o6soll22.fsf <at> gnu.org>
and subject line Re: bug#79128: 31.0.50; shortdoc doesn't always display the correct arglist
has caused the debbugs.gnu.org bug report #79128,
regarding 31.0.50; shortdoc doesn't always display the correct arglist
to be marked as done.

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help-debbugs <at> gnu.org.)


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79128: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=79128
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From: Robert Pluim <rpluim <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 31.0.50; shortdoc doesn't always display the correct arglist
Date: Wed, 30 Jul 2025 15:26:08 +0200

emacs -Q
(require 'shortdoc)
(shortdoc 'sequence)

The entry for e.g. `seq-empty-p' says:

    (seq-empty-p arg &rest args)
      Return non-nil if the SEQUENCE is empty, nil otherwise.
      (seq-empty-p [])
        ⇒ t

But C-h f seq-empty-p says:

    seq-empty-p is a byte-code-function in ‘seq.el’.

    (seq-empty-p SEQUENCE)

    Return non-nil if the SEQUENCE is empty, nil otherwise.

      Other relevant functions are documented in the sequence group.


    This is a generic function.

    Implementations:

    (seq-empty-p (LIST list)) in ‘seq.el’.

    Optimized implementation of ‘seq-empty-p’ for lists.

    (seq-empty-p SEQUENCE) in ‘seq.el’.

    Undocumented

I imagine this is some interaction between `cl-defgeneric' with an
implementation body, `cl-defmethod', and `help-function-arglist' (other
functions in  the 'sequence group are also affected). C-h f gets it
right, but I couldnʼt find a simple function in help-fns.el to get me
the actual arglist.

Robert

In GNU Emacs 31.0.50 (build 61, x86_64-pc-linux-gnu, X toolkit, cairo
 version 1.16.0) of 2025-07-28 built on rltb
Repository revision: d895d8d06e54ec741d495d23b7cdedf978f85da8
Repository branch: master
System Description: Debian GNU/Linux 12 (bookworm)

Configured using:
 'configure --without-toolkit-scroll-bars --with-x-toolkit=lucid
 --with-xinput2 'CFLAGS=-Og -ggdb''

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

From: Eli Zaretskii <eliz <at> gnu.org>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: 79128-done <at> debbugs.gnu.org, rpluim <at> gmail.com
Subject: Re: bug#79128: 31.0.50; shortdoc doesn't always display the correct
 arglist
Date: Sat, 09 Aug 2025 15:46:29 +0300

> From: Stefan Monnier <monnier <at> iro.umontreal.ca>
> Cc: Eli Zaretskii <eliz <at> gnu.org>,  79128 <at> debbugs.gnu.org
> Date: Thu, 07 Aug 2025 13:50:50 -0400
> 
> >>>>>> On Sat, 02 Aug 2025 15:35:44 -0400, Stefan Monnier <monnier <at> iro.umontreal.ca> said:
> >     >>> >> (seq-empty-p arg &rest args)
> >     Stefan> Hmm... I suggest the patch below.
> > That fixes `seq-empty-p',
> 
> Thanks, pushed to `master.

Thanks, closing.

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