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From: martin rudalics <rudalics@gmx.at>
To: Eli Zaretskii <eliz@gnu.org>
Cc: mwd@md5i.com, schwab@linux-m68k.org, 47244@debbugs.gnu.org, mwd@cert.org
Subject: bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs
Date: Tue, 30 Mar 2021 17:05:14 +0200	[thread overview]
Message-ID: <9f6993e1-642b-75f9-1820-f7521d047943@gmx.at> (raw)
In-Reply-To: <83h7ksk89q.fsf@gnu.org>

 > Maybe instead of trying to find the exact culprit, we should simply
 > protect this code:
 >
 >        /* Make sure the current window's buffer is selected.  */
 >        set_buffer_internal (XBUFFER (XWINDOW (selected_window)->contents));
 >
 > from selecting a dead buffer?  For example, by using
 > other_buffer_safely if the selected-window's buffer is dead.

The problem is that we already detect this situation too late in order
to tell who the real culprit is.  For example, a dead buffer stored in
the selected_window's contents field could have been a dead
current_buffer before.  So for some time we could have been already
running with a dead buffer in that filed.  Long enough maybe to cause
havoc elsewhere.  And what happened in between might not have used
set_buffer_internal but accessed that buffer more directly.

martin





  reply	other threads:[~2021-03-30 15:05 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 [this message]
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
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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