GNU bug report logs - #46116
28.0.50; Ticking articles fails on Emacs 28 pgtk build

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

From: Jonathan Corbet <corbet <at> lwn.net>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; Ticking articles fails on Emacs 28 pgtk build
Date: Tue, 26 Jan 2021 10:00:07 -0700

In the gnus summary view, invoking gnus-summary-tick-article-forward,
either by hand or via any of the usual keybindings, fails.

 - There is no visual change in the buffer, and point stays on the same
   line.
 - Actually, one visual change: if caching is turned on, a "*" appears
   on the line.
 - If I quit the group and go back in, the ticked article *might* show
   as ticked.  If I catch up the group before quitting, it definitely
   will not be.
 - No errors are signaled.

Everything else in gnus (so far) seems to work as expected.

Yes, I know, I'm running a development build, the pieces are mine to
pick up.  I'm not expecting you to fix this for me, but thought you
might want to know.  I'll try to find some time to dig into it, but my
elisp is ... mediocre ...

Thanks.


In GNU Emacs 28.0.50 (build 1, x86_64-redhat-linux-gnu, GTK+ Version 3.24.24, cairo version 1.16.0)
 of 2020-12-30 built on 0d6babf728854e07b1f1e901237372b8
Windowing system distributor 'System Description: Fedora 33 (Thirty Three)

Configured using:
 'configure --build=x86_64-redhat-linux-gnu
 --host=x86_64-redhat-linux-gnu --program-prefix=
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 --with-rsvg --with-tiff --with-xft --with-xpm --with-gpm=no
 --with-xwidgets --with-modules --with-harfbuzz --with-cairo --with-json
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 build_alias=x86_64-redhat-linux-gnu host_alias=x86_64-redhat-linux-gnu
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Minor modes in effect:
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Load-path shadows:
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/usr/share/emacs/site-lisp/lilypond-init hides /usr/share/emacs/site-lisp/site-start.d/lilypond-init

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Message #8 received at 46116 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Jonathan Corbet <corbet <at> lwn.net>
Cc: 46116 <at> debbugs.gnu.org
Subject: Re: bug#46116: 28.0.50; Ticking articles fails on Emacs 28 pgtk build
Date: Wed, 27 Jan 2021 02:43:14 +0100

Jonathan Corbet <corbet <at> lwn.net> writes:

> In the gnus summary view, invoking gnus-summary-tick-article-forward,
> either by hand or via any of the usual keybindings, fails.
>
>  - There is no visual change in the buffer, and point stays on the same
>    line.
>  - Actually, one visual change: if caching is turned on, a "*" appears
>    on the line.

I'm unable to reproduce this in Emacs 28, and it sounds very strange
(because this is pretty basic functionality).  Do you have any
customisations in this area?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

Message #13 received at 46116 <at> debbugs.gnu.org (full text, mbox):

From: Jonathan Corbet <corbet <at> lwn.net>
To: 46116 <at> debbugs.gnu.org
Subject: Re: bug#46116: Acknowledgement (28.0.50; Ticking articles fails on
 Emacs 28 pgtk build)
Date: Tue, 26 Jan 2021 15:00:26 -0700

On Tue, 26 Jan 2021 17:44:01 +0000
help-debbugs <at> gnu.org (GNU bug Tracking System) wrote:

> If you wish to submit further information on this problem, please
> send it to 46116 <at> debbugs.gnu.org.

So... Through the process of brute-force debugging, I found that simply
pulling up a copy of gnus-sum.el and doing an eval-defun on
gnus-summary-goto-subject makes the problem mysteriously go away.  This,
in turn, makes me suspect that the native compilation is the real problem,
and this is not a gnus issue at all.  Will try to pursue further;
apologies for wasting your time.

Thanks,

jon

Message #16 received at 46116 <at> debbugs.gnu.org (full text, mbox):

From: Kévin Le Gouguec <kevin.legouguec <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 46116 <at> debbugs.gnu.org, Jonathan Corbet <corbet <at> lwn.net>
Subject: Re: bug#46116: 28.0.50; Ticking articles fails on Emacs 28
 pgtk/native-comp build
Date: Wed, 27 Jan 2021 07:08:49 +0100

Lars Ingebrigtsen <larsi <at> gnus.org> writes:

> I'm unable to reproduce this in Emacs 28, and it sounds very strange
> (because this is pretty basic functionality).  Do you have any
> customisations in this area?

Cf. <20210126150026.4d5e0e96 <at> lwn.net>: jon happens to also run
--with-native-comp, which he suspects might be the culprit; this does
sound more likely than --with-pgtk, especially given the workaround he
describes (manually running eval-defun on gnus-summary-goto-subjet).

(Changing the Subject to reflect this)

Message #19 received at 46116 <at> debbugs.gnu.org (full text, mbox):

From: Andrea Corallo <akrl <at> sdf.org>
To: Jonathan Corbet <corbet <at> lwn.net>
Cc: 46116 <at> debbugs.gnu.org
Subject: Re: bug#46116: Acknowledgement (28.0.50; Ticking articles fails on
 Emacs 28 pgtk build)
Date: Wed, 27 Jan 2021 09:29:30 +0000

Jonathan Corbet <corbet <at> lwn.net> writes:

> On Tue, 26 Jan 2021 17:44:01 +0000
> help-debbugs <at> gnu.org (GNU bug Tracking System) wrote:
>
>> If you wish to submit further information on this problem, please
>> send it to 46116 <at> debbugs.gnu.org.
>
> So... Through the process of brute-force debugging, I found that simply
> pulling up a copy of gnus-sum.el and doing an eval-defun on
> gnus-summary-goto-subject makes the problem mysteriously go away.  This,
> in turn, makes me suspect that the native compilation is the real problem,
> and this is not a gnus issue at all.  Will try to pursue further;
> apologies for wasting your time.
>
> Thanks,
>
> jon

This is a possible miscommunication.  Could you report the input of the
function when the miss-behave is observed? 

Thanks

  Andrea

Message #22 received at 46116 <at> debbugs.gnu.org (full text, mbox):

From: Jonathan Corbet <corbet <at> lwn.net>
To: Andrea Corallo <akrl <at> sdf.org>
Cc: 46116 <at> debbugs.gnu.org
Subject: Re: bug#46116: Acknowledgement (28.0.50; Ticking articles fails on
 Emacs 28 pgtk build)
Date: Wed, 27 Jan 2021 10:54:27 -0700

On Wed, 27 Jan 2021 09:29:30 +0000
Andrea Corallo <akrl <at> sdf.org> wrote:

> > So... Through the process of brute-force debugging, I found that simply
> > pulling up a copy of gnus-sum.el and doing an eval-defun on
> > gnus-summary-goto-subject makes the problem mysteriously go away.  This,
> > in turn, makes me suspect that the native compilation is the real problem,
> > and this is not a gnus issue at all.  Will try to pursue further;
> > apologies for wasting your time.
> >
> > Thanks,
> >
> > jon  
> 
> This is a possible miscommunication.  Could you report the input of the
> function when the miss-behave is observed? 

Trying to determine that was how I found the workaround - putting in a
(message) call made the problem go away.  The call, though, is from
gnus-summary-mark-article:

> 	(when (gnus-summary-goto-subject article nil t)
> 	  (let ((inhibit-read-only t))
> 	    (gnus-summary-show-thread)
> 	    ;; Fix the mark.
> 	    (gnus-summary-update-mark mark 'unread)
> 	    t))))))

I was able to examine the arguments before the call; "article" is an
integer article number, as expected.

Thanks,

jon

Message #25 received at 46116 <at> debbugs.gnu.org (full text, mbox):

From: Andrea Corallo <akrl <at> sdf.org>
To: Jonathan Corbet <corbet <at> lwn.net>
Cc: 46116 <at> debbugs.gnu.org
Subject: Re: bug#46116: Acknowledgement (28.0.50; Ticking articles fails on
 Emacs 28 pgtk build)
Date: Wed, 27 Jan 2021 20:37:50 +0000

Jonathan Corbet <corbet <at> lwn.net> writes:

> On Wed, 27 Jan 2021 09:29:30 +0000
> Andrea Corallo <akrl <at> sdf.org> wrote:
>
>> > So... Through the process of brute-force debugging, I found that simply
>> > pulling up a copy of gnus-sum.el and doing an eval-defun on
>> > gnus-summary-goto-subject makes the problem mysteriously go away.  This,
>> > in turn, makes me suspect that the native compilation is the real problem,
>> > and this is not a gnus issue at all.  Will try to pursue further;
>> > apologies for wasting your time.
>> >
>> > Thanks,
>> >
>> > jon  
>> 
>> This is a possible miscommunication.  Could you report the input of the
>> function when the miss-behave is observed? 
>
> Trying to determine that was how I found the workaround - putting in a
> (message) call made the problem go away.  The call, though, is from
> gnus-summary-mark-article:

Perhaps you can put the print just before the call instead of inside,
this will not effect the function we are interested.

>> 	(when (gnus-summary-goto-subject article nil t)
>> 	  (let ((inhibit-read-only t))
>> 	    (gnus-summary-show-thread)
>> 	    ;; Fix the mark.
>> 	    (gnus-summary-update-mark mark 'unread)
>> 	    t))))))
>
> I was able to examine the arguments before the call; "article" is an
> integer article number, as expected.

Do we have a self contained reproducer I can look into?

Thanks for the investigation

  Andrea

Message #28 received at 46116 <at> debbugs.gnu.org (full text, mbox):

From: Jonathan Corbet <corbet <at> lwn.net>
To: Andrea Corallo <akrl <at> sdf.org>
Cc: 46116 <at> debbugs.gnu.org
Subject: Re: bug#46116: Acknowledgement (28.0.50; Ticking articles fails on
 Emacs 28 pgtk build)
Date: Wed, 27 Jan 2021 14:57:02 -0700

On Wed, 27 Jan 2021 20:37:50 +0000
Andrea Corallo <akrl <at> sdf.org> wrote:

> > Trying to determine that was how I found the workaround - putting in a
> > (message) call made the problem go away.  The call, though, is from
> > gnus-summary-mark-article:  
> 
> Perhaps you can put the print just before the call instead of inside,
> this will not effect the function we are interested.
> 
> >> 	(when (gnus-summary-goto-subject article nil t)

Indeed, I did that before when I reported that "article" is an integer
article number.  

> Do we have a self contained reproducer I can look into?

I wish.  In an attempt to get there I've gone from the Fedora build to a
build from the feature/native-comp branch.  Naturally, the problem doesn't
manifest itself there.  This seems like a real heisenbug, but it is also
possible that we're seeing something wrong with the Fedora build.  It may
be best to let this slide until such a time as I can reproduce it more
reliably.  Sorry if I've wasted your time...

Thanks,

jon

Message #31 received at 46116 <at> debbugs.gnu.org (full text, mbox):

From: Andrea Corallo <akrl <at> sdf.org>
To: Jonathan Corbet <corbet <at> lwn.net>
Cc: 46116 <at> debbugs.gnu.org
Subject: Re: bug#46116: Acknowledgement (28.0.50; Ticking articles fails on
 Emacs 28 pgtk build)
Date: Thu, 28 Jan 2021 07:58:16 +0000

Jonathan Corbet <corbet <at> lwn.net> writes:

> On Wed, 27 Jan 2021 20:37:50 +0000
> Andrea Corallo <akrl <at> sdf.org> wrote:
>
>> > Trying to determine that was how I found the workaround - putting in a
>> > (message) call made the problem go away.  The call, though, is from
>> > gnus-summary-mark-article:  
>> 
>> Perhaps you can put the print just before the call instead of inside,
>> this will not effect the function we are interested.
>> 
>> >> 	(when (gnus-summary-goto-subject article nil t)
>
> Indeed, I did that before when I reported that "article" is an integer
> article number.  
>
>> Do we have a self contained reproducer I can look into?
>
> I wish.  In an attempt to get there I've gone from the Fedora build to a
> build from the feature/native-comp branch.

Is Fedora buidling native-comp?

> Naturally, the problem doesn't
> manifest itself there.

Perhaps this is just more up-to date?

> This seems like a real heisenbug, but it is also
> possible that we're seeing something wrong with the Fedora build.  It may
> be best to let this slide until such a time as I can reproduce it more
> reliably.

Okay

> Sorry if I've wasted your time...

No problem, thanks for reporting and investigating the issue!

If this does not show up from source I guess we might close this bug?
We can always reopen in case. WDYT?

Regards

  Andrea

Message #34 received at 46116 <at> debbugs.gnu.org (full text, mbox):

From: Jonathan Corbet <corbet <at> lwn.net>
To: Andrea Corallo <akrl <at> sdf.org>
Cc: 46116 <at> debbugs.gnu.org
Subject: Re: bug#46116: Acknowledgement (28.0.50; Ticking articles fails on
 Emacs 28 pgtk build)
Date: Thu, 28 Jan 2021 16:48:32 -0700

On Thu, 28 Jan 2021 07:58:16 +0000
Andrea Corallo <akrl <at> sdf.org> wrote:

> > I wish.  In an attempt to get there I've gone from the Fedora build to a
> > build from the feature/native-comp branch.  
> 
> Is Fedora buidling native-comp?

It's a third-party ("copr") build at 

	https://copr.fedorainfracloud.org/coprs/deathwish/emacs-pgtk-nativecomp/

> > Naturally, the problem doesn't
> > manifest itself there.  
> 
> Perhaps this is just more up-to date?

That is entirely possible, yes.  

> > Sorry if I've wasted your time...  
> 
> No problem, thanks for reporting and investigating the issue!
> 
> If this does not show up from source I guess we might close this bug?
> We can always reopen in case. WDYT?

That's probably the thing to do, yes.  You'll hear back from me if I trip
across it in my build :)

Thanks,

jon

Message #39 received at 46116-done <at> debbugs.gnu.org (full text, mbox):

From: Andrea Corallo <akrl <at> sdf.org>
To: Jonathan Corbet <corbet <at> lwn.net>
Cc: 46116-done <at> debbugs.gnu.org
Subject: Re: bug#46116: Acknowledgement (28.0.50; Ticking articles fails on
 Emacs 28 pgtk build)
Date: Fri, 29 Jan 2021 08:50:34 +0000

Jonathan Corbet <corbet <at> lwn.net> writes:

> On Thu, 28 Jan 2021 07:58:16 +0000
> Andrea Corallo <akrl <at> sdf.org> wrote:
>
>> > I wish.  In an attempt to get there I've gone from the Fedora build to a
>> > build from the feature/native-comp branch.  
>> 
>> Is Fedora buidling native-comp?
>
> It's a third-party ("copr") build at 
>
> 	https://copr.fedorainfracloud.org/coprs/deathwish/emacs-pgtk-nativecomp/
>
>> > Naturally, the problem doesn't
>> > manifest itself there.  
>> 
>> Perhaps this is just more up-to date?
>
> That is entirely possible, yes.  
>
>> > Sorry if I've wasted your time...  
>> 
>> No problem, thanks for reporting and investigating the issue!
>> 
>> If this does not show up from source I guess we might close this bug?
>> We can always reopen in case. WDYT?
>
> That's probably the thing to do, yes.  You'll hear back from me if I trip
> across it in my build :)
>
> Thanks,
>
> jon

Hi Jon,

okay closing for now.

Thanks for reporting and investigating this.

  Andrea

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