GNU bug report logs - #80150
30.1.90; No simple way to go to a line number from Lisp while respecting widen-automatically

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Package: emacs; Reported by: Spencer Baugh <sbaugh@HIDDEN>; Done: Juri Linkov <juri@HIDDEN>; Maintainer for emacs is bug-gnu-emacs@HIDDEN.
bug marked as fixed in version 31.0.50, send any further explanations to 80150 <at> debbugs.gnu.org and Spencer Baugh <sbaugh@HIDDEN> Request was from Juri Linkov <juri@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: Juri Linkov <juri@HIDDEN>
To: Spencer Baugh <sbaugh@HIDDEN>
Subject: Re: bug#80150: 30.1.90; No simple way to go to a line number from
 Lisp while respecting widen-automatically
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close 80150 31.0.50
thanks

>>> Even the docstring says twice "If called interactively",
>>> so here is the patch that allows non-interactive calls:
>>
>> This looks good to me.  Maybe we should have a NEWS entry too, though?
>
> Not sure about NEWS — this would encourage non-interactive use,
> whereas it looks like an exception: only when widening is required.

So now pushed without announcing in NEWS.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#80150; Package emacs. Full text available.

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From: Juri Linkov <juri@HIDDEN>
To: Spencer Baugh <sbaugh@HIDDEN>
Subject: Re: bug#80150: 30.1.90; No simple way to go to a line number from
 Lisp while respecting widen-automatically
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>> Even the docstring says twice "If called interactively",
>> so here is the patch that allows non-interactive calls:
>
> This looks good to me.  Maybe we should have a NEWS entry too, though?

Not sure about NEWS — this would encourage non-interactive use,
whereas it looks like an exception: only when widening is required.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#80150; Package emacs. Full text available.

Message received at 80150 <at> debbugs.gnu.org:


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From: Spencer Baugh <sbaugh@HIDDEN>
To: Juri Linkov <juri@HIDDEN>
Subject: Re: bug#80150: 30.1.90; No simple way to go to a line number from
 Lisp while respecting widen-automatically
In-Reply-To: <878qdyrcrf.fsf@HIDDEN> (Juri Linkov's message of "Thu, 
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Juri Linkov <juri@HIDDEN> writes:

>>> If you look at goto-line, you'll see this is almost identical to some
>>> code in there.
>>
>> If you need to use 'goto-line' programmatically taking into account
>> narrowing, then we could add a new argument 'interactive'.
>>
>> I see only one line that should depend on this argument:
>>
>>   ;; Leave mark at previous position
>>   (or (region-active-p) (push-mark))
>>
>> All the rest of the function doesn't contain parts
>> that would require interactive-only.
>
> Even the docstring says twice "If called interactively",
> so here is the patch that allows non-interactive calls:

This looks good to me.  Maybe we should have a NEWS entry too, though?
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#80150; Package emacs. Full text available.

Message received at 80150 <at> debbugs.gnu.org:


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From: Juri Linkov <juri@HIDDEN>
To: Spencer Baugh <sbaugh@HIDDEN>
Subject: Re: bug#80150: 30.1.90; No simple way to go to a line number from
 Lisp while respecting widen-automatically
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--=-=-=
Content-Type: text/plain

>> If you look at goto-line, you'll see this is almost identical to some
>> code in there.
>
> If you need to use 'goto-line' programmatically taking into account
> narrowing, then we could add a new argument 'interactive'.
>
> I see only one line that should depend on this argument:
>
>   ;; Leave mark at previous position
>   (or (region-active-p) (push-mark))
>
> All the rest of the function doesn't contain parts
> that would require interactive-only.

Even the docstring says twice "If called interactively",
so here is the patch that allows non-interactive calls:


--=-=-=
Content-Type: text/x-diff
Content-Disposition: inline; filename=goto-line-interactive.patch

diff --git a/lisp/simple.el b/lisp/simple.el
index f06e473d383..ff06d6ac55e 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -1638,7 +1638,7 @@ goto-line-read-args
                          'goto-line-history)
             buffer))))
 
-(defun goto-line (line &optional buffer relative)
+(defun goto-line (line &optional buffer relative interactive)
   "Go to LINE, counting from line 1 at beginning of buffer.
 If called interactively, a numeric prefix argument specifies
 LINE; without a numeric prefix argument, read LINE from the
@@ -1659,21 +1659,23 @@ goto-line
 activating it), unless Transient Mark mode is enabled and the
 mark is already active.
 
+A non-nil INTERACTIVE argument means to push the mark.
+
 This function is usually the wrong thing to use in a Lisp program.
 What you probably want instead is something like:
   (goto-char (point-min))
   (forward-line (1- N))
 If at all possible, an even better solution is to use char counts
 rather than line counts."
-  (declare (interactive-only forward-line))
-  (interactive (goto-line-read-args))
+  (interactive (append (goto-line-read-args) '(nil t)))
   ;; Switch to the desired buffer, one way or another.
   (if buffer
       (let ((window (get-buffer-window buffer)))
 	(if window (select-window window)
 	  (switch-to-buffer-other-window buffer))))
   ;; Leave mark at previous position
-  (or (region-active-p) (push-mark))
+  (when interactive
+    (or (region-active-p) (push-mark)))
   ;; Move to the specified line number in that buffer.
   (let ((pos (save-restriction
                (unless relative (widen))
@@ -1690,14 +1692,13 @@ goto-line
       (widen))
     (goto-char pos)))
 
-(defun goto-line-relative (line &optional buffer)
+(defun goto-line-relative (line &optional buffer interactive)
   "Go to LINE, counting from line at (point-min).
 The line number is relative to the accessible portion of the narrowed
-buffer.  The argument BUFFER is the same as in the function `goto-line'."
-  (declare (interactive-only forward-line))
-  (interactive (goto-line-read-args t))
-  (with-suppressed-warnings ((interactive-only goto-line))
-    (goto-line line buffer t)))
+buffer.  The argument BUFFER is the same as in the function `goto-line'.
+A non-nil INTERACTIVE argument means to push the mark."
+  (interactive (append (goto-line-read-args t) t))
+  (goto-line line buffer t interactive))
 
 (defun count-words-region (start end &optional arg)
   "Count the number of words in the region.

--=-=-=--
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#80150; Package emacs. Full text available.

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From: Juri Linkov <juri@HIDDEN>
To: Spencer Baugh <sbaugh@HIDDEN>
Subject: Re: bug#80150: 30.1.90; No simple way to go to a line number from
 Lisp while respecting widen-automatically
In-Reply-To: <ierms2p8ogf.fsf@HIDDEN>
Organization: LINKOV.NET
References: <ierv7hd8u4y.fsf@HIDDEN> <86ms2pcyja.fsf@HIDDEN>
 <iersech8qpp.fsf@HIDDEN> <86ikddcwne.fsf@HIDDEN>
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Date: Tue, 13 Jan 2026 21:20:47 +0200
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> The real-world code to do this is more complex than that.
>
> Real-world code to do this looks like:
>
> (let ((pos (save-restriction
>              (widen)
>              (goto-char (point-min))
>              (forward-line (1- line))
>              (point))))
>   (when (and (buffer-narrowed-p)
>              widen-automatically
>              (or (> (point-min) pos) (> pos (point-max))))
>     (widen))
>   (goto-char pos))
>
> If you look at goto-line, you'll see this is almost identical to some
> code in there.

If you need to use 'goto-line' programmatically taking into account
narrowing, then we could add a new argument 'interactive'.

I see only one line that should depend on this argument:

  ;; Leave mark at previous position
  (or (region-active-p) (push-mark))

All the rest of the function doesn't contain parts
that would require interactive-only.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#80150; Package emacs. Full text available.

Message received at 80150 <at> debbugs.gnu.org:


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From: Spencer Baugh <sbaugh@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#80150: 30.1.90; No simple way to go to a line number from
 Lisp while respecting widen-automatically
In-Reply-To: <86ikddcwne.fsf@HIDDEN> (Eli Zaretskii's message of "Wed, 07 Jan
 2026 16:41:57 +0200")
References: <ierv7hd8u4y.fsf@HIDDEN> <86ms2pcyja.fsf@HIDDEN>
 <iersech8qpp.fsf@HIDDEN> <86ikddcwne.fsf@HIDDEN>
Date: Wed, 07 Jan 2026 09:52:32 -0500
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Eli Zaretskii <eliz@HIDDEN> writes:

>> From: Spencer Baugh <sbaugh@HIDDEN>
>> Cc: 80150 <at> debbugs.gnu.org
>> Date: Wed, 07 Jan 2026 09:03:46 -0500
>> 
>> Eli Zaretskii <eliz@HIDDEN> writes:
>> 
>> >> Date: Wed, 07 Jan 2026 07:49:49 -0500
>> >> From:  Spencer Baugh via "Bug reports for GNU Emacs,
>> >>  the Swiss army knife of text editors" <bug-gnu-emacs@HIDDEN>
>> >> 
>> >> 
>> >> There's no function to go to a line number from Lisp while respecting
>> >> widen-automatically: that is, if the buffer is narrowed, automatically
>> >> widen it.  goto-line does exactly this, but it's marked
>> >> interactive-only.  I think we should extract the relevant part of
>> >> goto-line into a separate function which can be used from Lisp.
>> >> 
>> >> I often need to do this because other programs produce file positions in
>> >> terms of line numbers, and I need to jump the user to these positions.
>> >
>> > The doc string of goto-line tells you what to do non-interactively.
>> > Why is doing that in your case a problem?
>> 
>> It doesn't respect widen-automatically.  That is, if the buffer is
>> narrowed, it doesn't automatically widen it if and only if it's
>> necesasry.
>
> "We have the technology."  What you need is something as simple as the
> below:
>
>    (save-restriction
>      (goto-char (point-min))
>      (forward-line (1- N))
>      (DO-SOMETHING))
> or
>    (widen)
>    (goto-char (point-min))
>    (forward-line (1- N))
>    (DO-SOMETHING)
>
> (depending on what you need to do in DO-SOMETHING).

The real-world code to do this is more complex than that.

Real-world code to do this looks like:

(let ((pos (save-restriction
             (widen)
             (goto-char (point-min))
             (forward-line (1- line))
             (point))))
  (when (and (buffer-narrowed-p)
             widen-automatically
             (or (> (point-min) pos) (> pos (point-max))))
    (widen))
  (goto-char pos))

If you look at goto-line, you'll see this is almost identical to some
code in there.

> I'm asking why do we need something else?

We don't need something else.  This code already exists in Emacs, it's
just inside an interactive-only function.

> and why does widening have to happen automatically?

Because widen-automatically is non-nil, which is the default.  See for
example xref--goto-char: xref (and eglot, which calls xref--goto-char)
will also automatically widen when jumping to a position.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#80150; Package emacs. Full text available.

Message received at 80150 <at> debbugs.gnu.org:


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Date: Wed, 07 Jan 2026 16:41:57 +0200
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From: Eli Zaretskii <eliz@HIDDEN>
To: Spencer Baugh <sbaugh@HIDDEN>
In-Reply-To: <iersech8qpp.fsf@HIDDEN> (message from Spencer Baugh on
 Wed, 07 Jan 2026 09:03:46 -0500)
Subject: Re: bug#80150: 30.1.90; No simple way to go to a line number from
 Lisp while respecting widen-automatically
References: <ierv7hd8u4y.fsf@HIDDEN> <86ms2pcyja.fsf@HIDDEN>
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> From: Spencer Baugh <sbaugh@HIDDEN>
> Cc: 80150 <at> debbugs.gnu.org
> Date: Wed, 07 Jan 2026 09:03:46 -0500
> 
> Eli Zaretskii <eliz@HIDDEN> writes:
> 
> >> Date: Wed, 07 Jan 2026 07:49:49 -0500
> >> From:  Spencer Baugh via "Bug reports for GNU Emacs,
> >>  the Swiss army knife of text editors" <bug-gnu-emacs@HIDDEN>
> >> 
> >> 
> >> There's no function to go to a line number from Lisp while respecting
> >> widen-automatically: that is, if the buffer is narrowed, automatically
> >> widen it.  goto-line does exactly this, but it's marked
> >> interactive-only.  I think we should extract the relevant part of
> >> goto-line into a separate function which can be used from Lisp.
> >> 
> >> I often need to do this because other programs produce file positions in
> >> terms of line numbers, and I need to jump the user to these positions.
> >
> > The doc string of goto-line tells you what to do non-interactively.
> > Why is doing that in your case a problem?
> 
> It doesn't respect widen-automatically.  That is, if the buffer is
> narrowed, it doesn't automatically widen it if and only if it's
> necesasry.

"We have the technology."  What you need is something as simple as the
below:

   (save-restriction
     (goto-char (point-min))
     (forward-line (1- N))
     (DO-SOMETHING))
or
   (widen)
   (goto-char (point-min))
   (forward-line (1- N))
   (DO-SOMETHING)

(depending on what you need to do in DO-SOMETHING).

I'm asking why do we need something else? and why does widening have
to happen automatically?
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#80150; Package emacs. Full text available.

Message received at 80150 <at> debbugs.gnu.org:


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From: Spencer Baugh <sbaugh@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#80150: 30.1.90; No simple way to go to a line number from
 Lisp while respecting widen-automatically
In-Reply-To: <86ms2pcyja.fsf@HIDDEN> (Eli Zaretskii's message of "Wed, 07 Jan
 2026 16:01:13 +0200")
References: <ierv7hd8u4y.fsf@HIDDEN> <86ms2pcyja.fsf@HIDDEN>
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Eli Zaretskii <eliz@HIDDEN> writes:

>> Date: Wed, 07 Jan 2026 07:49:49 -0500
>> From:  Spencer Baugh via "Bug reports for GNU Emacs,
>>  the Swiss army knife of text editors" <bug-gnu-emacs@HIDDEN>
>> 
>> 
>> There's no function to go to a line number from Lisp while respecting
>> widen-automatically: that is, if the buffer is narrowed, automatically
>> widen it.  goto-line does exactly this, but it's marked
>> interactive-only.  I think we should extract the relevant part of
>> goto-line into a separate function which can be used from Lisp.
>> 
>> I often need to do this because other programs produce file positions in
>> terms of line numbers, and I need to jump the user to these positions.
>
> The doc string of goto-line tells you what to do non-interactively.
> Why is doing that in your case a problem?

It doesn't respect widen-automatically.  That is, if the buffer is
narrowed, it doesn't automatically widen it if and only if it's
necesasry.
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#80150; Package emacs. Full text available.

Message received at 80150 <at> debbugs.gnu.org:


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Date: Wed, 07 Jan 2026 16:01:13 +0200
Message-Id: <86ms2pcyja.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
To: Spencer Baugh <sbaugh@HIDDEN>
In-Reply-To: <ierv7hd8u4y.fsf@HIDDEN> (bug-gnu-emacs@HIDDEN)
Subject: Re: bug#80150: 30.1.90;
 No simple way to go to a line number from Lisp while respecting
 widen-automatically
References: <ierv7hd8u4y.fsf@HIDDEN>
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> Date: Wed, 07 Jan 2026 07:49:49 -0500
> From:  Spencer Baugh via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@HIDDEN>
> 
> 
> There's no function to go to a line number from Lisp while respecting
> widen-automatically: that is, if the buffer is narrowed, automatically
> widen it.  goto-line does exactly this, but it's marked
> interactive-only.  I think we should extract the relevant part of
> goto-line into a separate function which can be used from Lisp.
> 
> I often need to do this because other programs produce file positions in
> terms of line numbers, and I need to jump the user to these positions.

The doc string of goto-line tells you what to do non-interactively.
Why is doing that in your case a problem?
Information forwarded to bug-gnu-emacs@HIDDEN:
bug#80150; Package emacs. Full text available.

Message received at submit <at> debbugs.gnu.org:


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Subject: 30.1.90; No simple way to go to a line number from Lisp while
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There's no function to go to a line number from Lisp while respecting
widen-automatically: that is, if the buffer is narrowed, automatically
widen it.  goto-line does exactly this, but it's marked
interactive-only.  I think we should extract the relevant part of
goto-line into a separate function which can be used from Lisp.

I often need to do this because other programs produce file positions in
terms of line numbers, and I need to jump the user to these positions.


In GNU Emacs 30.1.90 (build 91, x86_64-pc-linux-gnu, X toolkit, cairo
 version 1.15.12, Xaw scroll bars) of 2025-12-29 built on
 igm-qws-u22796a
Repository revision: c4a0657b9713f73300ef01bbcac94e583832a7ea
Repository branch: emacs-30
Windowing system distributor 'The X.Org Foundation', version 11.0.12011000
System Description: Rocky Linux 8.10 (Green Obsidian)

Configured using:
 'configure --with-x-toolkit=lucid --without-gpm --without-gconf
 --without-selinux --without-imagemagick --with-modules --with-gif=no
 --with-cairo --with-rsvg --without-compress-install --with-tree-sitter
 --with-native-compilation=aot
 PKG_CONFIG_PATH=/usr/local/home/garnish/libtree-sitter/0.22.6-1/lib/pkgconfig/'
Acknowledgement sent to Spencer Baugh <sbaugh@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#80150; Package emacs. Full text available.
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