From: Eli Zaretskii <eliz@gnu.org>
To: "Michaël Cadilhac" <michael@cadilhac.name>
Cc: 65877@debbugs.gnu.org
Subject: bug#65877: 29.1; line-number-at-pos crashes with args-out-of-range when ran using emacsclient
Date: Tue, 12 Sep 2023 14:28:59 +0300 [thread overview]
Message-ID: <83o7i7pr44.fsf@gnu.org> (raw)
In-Reply-To: <CADt3fpPDMuWXp9S2-FyKaryWVRBpKsNibFC1gqJgQ39FQcT4ZQ@mail.gmail.com> (message from Michaël Cadilhac on Mon, 11 Sep 2023 16:07:42 -0500)
tags 65877 notabug
thanks
> From: Michaël Cadilhac <michael@cadilhac.name>
> Date: Mon, 11 Sep 2023 16:07:42 -0500
>
> How to reproduce: start with
>
> $ emacs -Q
>
> M-x server-start
>
> Open a file with say 200 lines, scroll at the bottom, so that the
> first line of the file is not at the top of the window.
>
> Then in a shell, run:
>
> $ emacsclient -e '(line-number-at-pos (window-start))'
> *ERROR*: Args out of range: 146, 1, 1
This is a cockpit error, not a bug. The doc string of
line-number-at-pos says:
line-number-at-pos is a built-in function in ‘src/fns.c’.
(line-number-at-pos &optional POSITION ABSOLUTE)
Return the line number at POSITION in the current buffer.
^^^^^^^^^^^^^^^^^^^^^
So the correct form to evaluate is this:
$ emacsclient -e "(with-current-buffer (window-buffer) (line-number-at-pos (window-start)))"
IOW, you must make sure the buffer of the selected window is current
when the server evaluates the expression. It is not guaranteed by
default:
$ emacsclient -e "(message \"%s\" (current-buffer))"
" *server*"
next prev parent reply other threads:[~2023-09-12 11:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-11 21:07 bug#65877: 29.1; line-number-at-pos crashes with args-out-of-range when ran using emacsclient Michaël Cadilhac
2023-09-12 11:28 ` Eli Zaretskii [this message]
2023-09-12 15:59 ` Michaël Cadilhac
2023-09-12 16:43 ` Eli Zaretskii
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