GNU bug report logs - #57256
Very long lines displayed in debugger window

Previous Next

To add a comment to this bug, you must first unarchive it, by sending
a message to control AT debbugs.gnu.org, with unarchive 57256 in the body.
You can then email your comments to 57256 AT debbugs.gnu.org in the normal way.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: uzibalqa <uzibalqa <at> proton.me>
To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org>
Subject: Very long lines displayed in debugger window
Date: Wed, 17 Aug 2022 01:45:58 +0000

When I use the debugger I frequently get extremely long lines.  I either have to move an
excessive amount to the right or having to reduce the scale height to a point where the
text gets too small to read.

Some work needs to be done so as to prettify the debugger output.

Message #8 received at 57256 <at> debbugs.gnu.org (full text, mbox):

From: Phil Sainty <psainty <at> orcon.net.nz>
To: uzibalqa <uzibalqa <at> proton.me>
Cc: 57256 <at> debbugs.gnu.org
Subject: Re: bug#57256: Very long lines displayed in debugger window
Date: Wed, 17 Aug 2022 13:55:27 +1200

On 2022-08-17 13:45, uzibalqa wrote:
> When I use the debugger I frequently get extremely long lines.
> I either have to move an excessive amount to the right or having
> to reduce the scale height to a point where the text gets too
> small to read.

You can also simply M-x toggle-truncate-lines

Message #11 received at 57256 <at> debbugs.gnu.org (full text, mbox):

From: uzibalqa <uzibalqa <at> proton.me>
To: Phil Sainty <psainty <at> orcon.net.nz>
Cc: 57256 <at> debbugs.gnu.org
Subject: Re: bug#57256: Very long lines displayed in debugger window
Date: Wed, 17 Aug 2022 02:24:35 +0000

------- Original Message -------
On Wednesday, August 17th, 2022 at 1:55 AM, Phil Sainty <psainty <at> orcon.net.nz> wrote:


> On 2022-08-17 13:45, uzibalqa wrote:
>
> > When I use the debugger I frequently get extremely long lines.
> > I either have to move an excessive amount to the right or having
> > to reduce the scale height to a point where the text gets too
> > small to read.
>
>
> You can also simply M-x toggle-truncate-lines

Would be much better to prettify the display and fitting it in the debugger window
automatically.   Reduces the amount of continuous typing we all have to do during
our interaction with emacs.  We sprain our fingers frequently enough that we can do
without.

Message #14 received at 57256 <at> debbugs.gnu.org (full text, mbox):

From: Phil Sainty <psainty <at> orcon.net.nz>
To: uzibalqa <uzibalqa <at> proton.me>
Cc: 57256 <at> debbugs.gnu.org
Subject: Re: bug#57256: Very long lines displayed in debugger window
Date: Wed, 17 Aug 2022 15:37:37 +1200

On 2022-08-17 14:24, uzibalqa wrote:
>> You can also simply M-x toggle-truncate-lines
> 
> Would be much better to prettify the display and fitting it in the
> debugger window automatically.

Conversely, a debugger frame might have a HUGE amount of data in that
truncated information, yet it might be a frame you don't care about,
and then you might have many pages of prettified output to get past in
order to see what you're actually interested in, which is irritating.

So I think even with prettified output, being able to toggle that is
going to be a necessary feature.


> Reduces the amount of continuous typing we all have to do during
> our interaction with emacs.

FWIW I highly recommend binding `toggle-truncate-lines' to a key
sequence (I have it on "s-\") as I find it's a very helpful thing to
have trivially available (i.e. without much typing) in all kinds of
situations.

Message #17 received at 57256 <at> debbugs.gnu.org (full text, mbox):

From: uzibalqa <uzibalqa <at> proton.me>
To: Phil Sainty <psainty <at> orcon.net.nz>
Cc: 57256 <at> debbugs.gnu.org
Subject: Re: bug#57256: Very long lines displayed in debugger window
Date: Wed, 17 Aug 2022 03:48:40 +0000

------- Original Message -------
On Wednesday, August 17th, 2022 at 3:37 AM, Phil Sainty <psainty <at> orcon.net.nz> wrote:


> On 2022-08-17 14:24, uzibalqa wrote:
>
> > > You can also simply M-x toggle-truncate-lines
> >
> > Would be much better to prettify the display and fitting it in the
> > debugger window automatically.
>
>
> Conversely, a debugger frame might have a HUGE amount of data in that
> truncated information, yet it might be a frame you don't care about,
> and then you might have many pages of prettified output to get past in
> order to see what you're actually interested in, which is irritating.
>
> So I think even with prettified output, being able to toggle that is
> going to be a necessary feature.
>
> > Reduces the amount of continuous typing we all have to do during
> > our interaction with emacs.
>
>
> FWIW I highly recommend binding `toggle-truncate-lines' to a key
> sequence (I have it on "s-\") as I find it's a very helpful thing to
> have trivially available (i.e. without much typing) in all kinds of
> situations.

If that is the case (huge amount of data) can there be a debug customisation
variable that regulates the display, so users can decide what they prefer to
see by default?

Message #20 received at 57256 <at> debbugs.gnu.org (full text, mbox):

From: Akib Azmain Turja <akib <at> disroot.org>
To: Phil Sainty <psainty <at> orcon.net.nz>
Cc: 57256 <at> debbugs.gnu.org, uzibalqa <uzibalqa <at> proton.me>
Subject: Re: bug#57256: Very long lines displayed in debugger window
Date: Wed, 17 Aug 2022 12:26:05 +0600

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

Phil Sainty <psainty <at> orcon.net.nz> writes:

> You can also simply M-x toggle-truncate-lines

Or, C-x x t

-- 
Akib Azmain Turja

Find me on Mastodon at @akib <at> hostux.social.

This message is signed by me with my GnuPG key.  Its fingerprint is:

    7001 8CE5 819F 17A3 BBA6  66AF E74F 0EFA 922A E7F5

[signature.asc (application/pgp-signature, inline)]

Message #23 received at 57256 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: uzibalqa <uzibalqa <at> proton.me>
Cc: 57256 <at> debbugs.gnu.org
Subject: Re: bug#57256: Very long lines displayed in debugger window
Date: Wed, 17 Aug 2022 13:13:08 +0200

uzibalqa <uzibalqa <at> proton.me> writes:

> When I use the debugger I frequently get extremely long lines.  I
> either have to move an excessive amount to the right or having to
> reduce the scale height to a point where the text gets too small to
> read.
>
> Some work needs to be done so as to prettify the debugger output.

The data shown there is necessary, so this is working as designed.

Closing.

Message #30 received at 57256 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: uzibalqa <uzibalqa <at> proton.me>
Cc: psainty <at> orcon.net.nz, 57256 <at> debbugs.gnu.org
Subject: Re: bug#57256: Very long lines displayed in debugger window
Date: Wed, 17 Aug 2022 14:55:20 +0300

> Cc: 57256 <at> debbugs.gnu.org
> Date: Wed, 17 Aug 2022 03:48:40 +0000
> From:  uzibalqa via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> If that is the case (huge amount of data) can there be a debug customisation
> variable that regulates the display, so users can decide what they prefer to
> see by default?

It sounds like a solution that looks for a problem to me.

What exactly is the problem with the very long lines you see now?
Emacs has several display-related capabilities to allow you both bring
the hidden parts into view and disregard them, depending on your
needs.  I don't see why we need to add a pretty-printing feature,
which would definitely make the buffer have more lines, and then on
top of that add a customization option to selectively disable the
pretty-printing.  It's a complicated solution (and likely will become
even more so once we implement it) for a problem that I fail to see in
practice.

Message #33 received at 57256 <at> debbugs.gnu.org (full text, mbox):

From: uzibalqa <uzibalqa <at> proton.me>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 57256 <at> debbugs.gnu.org
Subject: Re: bug#57256: Very long lines displayed in debugger window
Date: Wed, 17 Aug 2022 20:37:25 +0000

------- Original Message -------
On Wednesday, August 17th, 2022 at 11:13 AM, Lars Ingebrigtsen <larsi <at> gnus.org> wrote:


> uzibalqa uzibalqa <at> proton.me writes:
>
> > When I use the debugger I frequently get extremely long lines. I
> > either have to move an excessive amount to the right or having to
> > reduce the scale height to a point where the text gets too small to
> > read.
> >
> > Some work needs to be done so as to prettify the debugger output.
>
>
> The data shown there is necessary, so this is working as designed.
>
> Closing.

The report is not about reducing the amount of output.  But in not
letting the debug information drag on horizontally ad infinitum.

Message #36 received at 57256 <at> debbugs.gnu.org (full text, mbox):

From: Phil Sainty <psainty <at> orcon.net.nz>
To: uzibalqa <uzibalqa <at> proton.me>
Cc: 57256 <at> debbugs.gnu.org
Subject: Re: bug#57256: Very long lines displayed in debugger window
Date: Fri, 19 Aug 2022 01:39:35 +1200

On 2022-08-17 13:55, Phil Sainty wrote:
> On 2022-08-17 13:45, uzibalqa wrote:
>> When I use the debugger I frequently get extremely long lines.
>> I either have to move an excessive amount to the right or having
>> to reduce the scale height to a point where the text gets too
>> small to read.
> 
> You can also simply M-x toggle-truncate-lines

In fact, the debugger already supports pretty-printing for the
frame at point if you type "+" (collapse again with "-").

Here's a starter for you:

(defun debugger-expand-all-frames ()
  "Call `backtrace-multi-line' for all debugger frames."
  (interactive)
  (save-excursion
    (goto-char (point-min))
    (while (ignore-errors (backtrace-forward-frame))
      (backtrace-multi-line))))

(define-key debugger-mode-map (kbd "*") #'debugger-expand-all-frames)

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.