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From: Michael Welsh Duggan <mwd@md5i.com>
To: martin rudalics <rudalics@gmx.at>
Cc: Michael Welsh Duggan <mwd@md5i.com>,
	"schwab@linux-m68k.org" <schwab@linux-m68k.org>,
	"47244@debbugs.gnu.org" <47244@debbugs.gnu.org>,
	Michael Welsh Duggan <mwd@cert.org>
Subject: bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs
Date: Wed, 07 Apr 2021 08:42:59 -0400	[thread overview]
Message-ID: <8735w2p8oc.fsf@md5i.com> (raw)
In-Reply-To: <233daa4b-ca64-955f-2612-49a0503b1938@gmx.at> (martin rudalics's message of "Wed, 7 Apr 2021 11:00:36 +0200")

martin rudalics <rudalics@gmx.at> writes:

>> Just a shot in the dark here.  The only way I can think of this
>> occurring (Vwindow_list being too small), is that something modified
>> Vwindow_list when we don't expect it to be modified.  I looked through
>> all the uses of Vwindow_list and window_list(), and they all look
>> kosher.  The only modification seems to be setting Vwindow_list to nil.
>> But window_list() does call into lisp (nconc2, which calls Fnconc) when
>> constructing Vwindow_list, and it uses Vwindow_list as a temporary in
>> the process.  Is it possible that during that call something happens
>> asynchronously (via gc?) that calls something that sets Vwindow_list
>> to nil again, while Vwindow_list is being constructed?
>
> Improbable but I attached some code that could detect such an
> incidence.  Put a breakpoint at the
>
> 	Vwindow_list = window_list_2;
>
> line.
>
>> I don't think
>> so, off hand, but I'm grasping at straws.
>
> I also added a variable called `window-list-lengths' which records the
> last 20 or so last changes in the number of windows seen by window_list.
> Maybe you can detect some strange 2 ~> 6 or 6 ~> 2 change while running
> Gnus.  I'm still not sure whether your daemon setup could be involved
> somehow.

I can run with this, but I am uncertain how I should be using it.  What
should I be trapping on and looking at?  I'm guessing the same process
as I used before, but we get another variable we can look at in the
process?

-- 
Michael Welsh Duggan
(md5i@md5i.com)





  reply	other threads:[~2021-04-07 12:42 UTC|newest]

Thread overview: 160+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-18 15:39 bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs Michael Welsh Duggan
2021-03-18 15:42 ` Michael Welsh Duggan
2021-03-18 15:49   ` Michael Welsh Duggan
2021-03-18 16:02     ` Andreas Schwab
2021-03-18 16:02   ` Eli Zaretskii
2021-03-18 16:27     ` Michael Welsh Duggan
2021-03-18 16:45       ` Eli Zaretskii
2021-03-18 16:54         ` Michael Welsh Duggan
2021-03-18 18:41           ` Eli Zaretskii
2021-03-18 18:54             ` Michael Welsh Duggan
2021-03-18 19:16               ` Eli Zaretskii
2021-03-18 19:24                 ` Michael Welsh Duggan
2021-03-18 19:51                   ` Eli Zaretskii
2021-03-18 20:13                     ` Andreas Schwab
2021-03-18 20:27                       ` Eli Zaretskii
2021-03-19  1:50                         ` Michael Welsh Duggan
2021-03-19  6:47                           ` Eli Zaretskii
2021-03-19 13:37                             ` Michael Welsh Duggan
2021-03-19 13:41                               ` Michael Welsh Duggan
2021-03-19 13:51                                 ` Eli Zaretskii
2021-03-19 13:49                               ` Eli Zaretskii
2021-03-19 14:18                                 ` Michael Welsh Duggan
2021-03-19 14:21                                   ` Michael Welsh Duggan
2021-03-19 15:00                                     ` Eli Zaretskii
2021-03-19 15:14                                       ` Michael Welsh Duggan
2021-03-23 14:18                                       ` Michael Welsh Duggan
2021-03-23 15:02                                         ` Eli Zaretskii
2021-03-23 15:08                                           ` Michael Welsh Duggan
2021-03-23 16:42                                             ` Eli Zaretskii
2021-03-23 15:23                                         ` martin rudalics
2021-03-23 15:53                                           ` Michael Welsh Duggan
2021-03-23 16:45                                             ` Eli Zaretskii
2021-03-24  6:53                                             ` martin rudalics
2021-03-24 14:14                                               ` Michael Welsh Duggan
2021-03-24 16:09                                                 ` martin rudalics
2021-03-25  2:19                                                   ` Michael Welsh Duggan
2021-03-25  6:25                                                     ` Eli Zaretskii
2021-03-29 14:06                                                       ` Michael Welsh Duggan
2021-03-29 14:28                                                         ` Eli Zaretskii
2021-03-29 14:39                                                           ` Michael Welsh Duggan
2021-03-29 15:02                                                             ` Eli Zaretskii
2021-03-29 15:07                                                               ` Eli Zaretskii
2021-03-29 15:21                                                                 ` Michael Welsh Duggan
2021-03-29 15:26                                                                   ` Michael Welsh Duggan
2021-03-29 15:27                                                                   ` Eli Zaretskii
2021-03-29 15:33                                                                     ` Michael Welsh Duggan
2021-03-29 15:34                                                                       ` Michael Welsh Duggan
2021-03-29 15:41                                                                       ` Eli Zaretskii
2021-03-29 16:23                                                                         ` Michael Welsh Duggan
2021-03-29 15:21                                                                 ` Eli Zaretskii
2021-03-29 16:05                                                                   ` martin rudalics
2021-03-29 16:26                                                                     ` Michael Welsh Duggan
2021-03-29 17:33                                                                       ` martin rudalics
2021-03-29 19:12                                                                         ` Michael Welsh Duggan
2021-03-30  7:30                                                                           ` martin rudalics
2021-03-30 13:39                                                                             ` Michael Welsh Duggan
2021-03-30 14:36                                                                               ` martin rudalics
2021-03-30 14:51                                                                                 ` Michael Welsh Duggan
2021-03-30 15:05                                                                                   ` martin rudalics
2021-03-30 14:13                                                                             ` Michael Welsh Duggan
2021-03-30 14:36                                                                               ` martin rudalics
2021-03-30 14:48                                                                                 ` Eli Zaretskii
2021-03-30 15:05                                                                                   ` martin rudalics
2021-03-30 15:13                                                                                     ` Eli Zaretskii
2021-03-30 16:52                                                                                       ` martin rudalics
2021-03-30 17:05                                                                                         ` Eli Zaretskii
2021-03-31  6:41                                                                                           ` martin rudalics
2021-03-31  7:09                                                                                             ` Eli Zaretskii
2021-03-30 15:03                                                                                 ` Michael Welsh Duggan
2021-03-30 16:52                                                                                   ` martin rudalics
2021-03-31 13:23                                                                                 ` Michael Welsh Duggan
2021-03-31 13:53                                                                                   ` Michael Welsh Duggan
2021-03-31 14:01                                                                                     ` Eli Zaretskii
2021-03-31 14:32                                                                                       ` martin rudalics
2021-03-31 14:48                                                                                         ` Michael Welsh Duggan
2021-03-31 15:49                                                                                           ` martin rudalics
2021-03-31 17:01                                                                                             ` Michael Welsh Duggan
2021-03-31 18:41                                                                                               ` martin rudalics
2021-03-31 19:14                                                                                                 ` Michael Welsh Duggan
2021-03-31 19:18                                                                                                   ` Michael Welsh Duggan
2021-04-01  7:14                                                                                                     ` martin rudalics
2021-04-01  7:45                                                                                                       ` Eli Zaretskii
2021-04-01 13:20                                                                                                         ` Michael Welsh Duggan
2021-04-01 13:22                                                                                                           ` Eli Zaretskii
2021-04-01 13:54                                                                                             ` Michael Welsh Duggan
2021-04-01 14:56                                                                                               ` martin rudalics
2021-04-01 18:30                                                                                                 ` Michael Welsh Duggan
2021-04-01 19:31                                                                                                   ` Michael Welsh Duggan
2021-04-02  6:48                                                                                                   ` martin rudalics
2021-04-05 18:15                                                                                                     ` Michael Welsh Duggan
2021-04-05 18:45                                                                                                       ` martin rudalics
2021-04-05 19:57                                                                                                         ` Michael Welsh Duggan
2021-04-05 20:39                                                                                                           ` martin rudalics
2021-04-05 20:56                                                                                                             ` Michael Welsh Duggan
2021-04-06  8:10                                                                                                               ` martin rudalics
2021-04-06 14:40                                                                                                                 ` Michael Welsh Duggan
2021-04-06 16:12                                                                                                                   ` martin rudalics
2021-04-06 16:48                                                                                                                     ` Michael Welsh Duggan
2021-04-06 17:00                                                                                                                       ` martin rudalics
2021-04-06 17:24                                                                                                                         ` Michael Welsh Duggan
2021-04-07  2:22                                                                                                                           ` Michael Welsh Duggan
2021-04-07  7:52                                                                                                                             ` Andreas Schwab
2021-04-07  9:00                                                                                                                             ` martin rudalics
2021-04-07 12:42                                                                                                                               ` Michael Welsh Duggan [this message]
2021-04-07 13:35                                                                                                                                 ` martin rudalics
2021-04-07 15:29                                                                                                                                   ` Michael Welsh Duggan
2021-04-07 16:16                                                                                                                                     ` martin rudalics
2021-04-07 17:37                                                                                                                                       ` Michael Welsh Duggan
2021-04-07 17:55                                                                                                                                         ` Michael Welsh Duggan
2021-04-07 18:31                                                                                                                                         ` Michael Welsh Duggan
2021-04-07 19:25                                                                                                                                           ` Michael Welsh Duggan
2021-04-07 20:25                                                                                                                                             ` martin rudalics
2021-04-07 20:32                                                                                                                                               ` Michael Welsh Duggan
2021-04-08  6:59                                                                                                                                                 ` martin rudalics
2021-04-08 10:47                                                                                                                                                   ` Gregory Heytings
2021-04-08 11:39                                                                                                                                                     ` Eli Zaretskii
2021-04-08 12:06                                                                                                                                                       ` Andreas Schwab
2021-04-08 12:29                                                                                                                                                         ` Eli Zaretskii
2021-04-08 12:43                                                                                                                                                           ` Gregory Heytings
2021-04-08 12:59                                                                                                                                                             ` Eli Zaretskii
2021-04-08 16:20                                                                                                                                                               ` Gregory Heytings
2021-04-08 12:03                                                                                                                                                     ` martin rudalics
2021-04-08 12:24                                                                                                                                                       ` Gregory Heytings
2021-04-08 13:39                                                                                                                                                         ` Michael Welsh Duggan
2021-04-08 14:35                                                                                                                                                   ` Michael Welsh Duggan
2021-04-08 15:08                                                                                                                                                     ` Eli Zaretskii
2021-04-08 15:24                                                                                                                                                       ` Andreas Schwab
2021-04-08 15:21                                                                                                                                                     ` Michael Welsh Duggan
2021-04-08 15:33                                                                                                                                                       ` Michael Welsh Duggan
2021-04-08 15:48                                                                                                                                                       ` martin rudalics
2021-04-08 16:01                                                                                                                                                         ` Michael Welsh Duggan
2021-04-08 16:14                                                                                                                                                           ` martin rudalics
2021-04-08 16:35                                                                                                                                                           ` Eli Zaretskii
2021-04-08 16:42                                                                                                                                                             ` Michael Welsh Duggan
2021-04-08 15:58                                                                                                                                                       ` Eli Zaretskii
2021-04-08 16:05                                                                                                                                                         ` Michael Welsh Duggan
2021-04-08 16:28                                                                                                                                                           ` Eli Zaretskii
2021-04-08 16:37                                                                                                                                                             ` Michael Welsh Duggan
2021-04-08 16:49                                                                                                                                                               ` Eli Zaretskii
2021-04-08 17:15                                                                                                                                                                 ` Michael Welsh Duggan
2021-04-08 17:11                                                                                                                                                         ` Michael Welsh Duggan
2021-04-08 17:46                                                                                                                                                           ` Eli Zaretskii
2021-04-08 17:51                                                                                                                                                             ` Michael Welsh Duggan
2021-04-08 18:52                                                                                                                                                           ` martin rudalics
2021-04-09 20:59                                                                                                                                                             ` Michael Welsh Duggan
2021-04-10  7:15                                                                                                                                                               ` martin rudalics
2021-04-10 14:53                                                                                                                                                                 ` Michael Welsh Duggan
2021-04-10 18:57                                                                                                                                                                   ` martin rudalics
2021-04-17  8:01                                                                                                                                                                     ` martin rudalics
2021-04-20 14:03                                                                                                                                                                       ` Michael Welsh Duggan
2021-04-07 19:40                                                                                                                                           ` Eli Zaretskii
2021-04-07 18:48                                                                                                                                         ` martin rudalics
2021-04-07 18:53                                                                                                                                           ` Michael Welsh Duggan
2021-04-07 20:25                                                                                                                                             ` martin rudalics
2021-04-07  9:00                                                                                                                           ` martin rudalics
2021-03-19  8:15                         ` martin rudalics
2021-03-19  8:19                           ` Eli Zaretskii
2021-03-19  9:18                             ` martin rudalics
2021-03-19  9:37                               ` martin rudalics
2021-03-19 11:55                               ` Eli Zaretskii

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