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From: Andrea Corallo via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 47067@debbugs.gnu.org
Subject: bug#47067: 28.0.50; [feature/native-comp] Crash while scrolling through dispnew.c
Date: Fri, 12 Mar 2021 06:46:50 +0000	[thread overview]
Message-ID: <xjf1rck50o5.fsf@sdf.org> (raw)
In-Reply-To: <83sg52lykn.fsf@gnu.org> (Eli Zaretskii's message of "Thu, 11 Mar 2021 13:27:52 +0200")

Eli Zaretskii <eliz@gnu.org> writes:

> I was hit by a segfault while scrolling through a C source file, in
> this case dispnew.c.  The sequence of commands was this:
>
>  emacs -Q
>  C-h sit-for RET
>  Click on the link to subr.el
>  In subr.el go to where sit-for calls sleep-for and type C-h f RET
>  Click on "C source code" to display dispnew.c
>  Scroll down with C-n or C-v

I can't reproduce here :/

> The backtrace appears below, with some data I collected.  The argument
> 'args' to Flss is obviously bogus, but I don't understand how it came
> into existence.  Maybe related to 0x30, which stands for the symbol t?
> The first call-stack frame above that I can examine, frame #4, calls
> c-beginning-of-statement-1 with 4 nil args and the last argument of t.
> The levels below that are impenetrable for me: is there a way of
> digging into this
> F632d626567696e6e696e672d6f662d73746174656d656e742d31_c_beginning_of_statement_1_0
> thing?
>
> Any suggestions for how to debug this further or what data to collect
> that will give you an idea for the root cause(s)?

Assuming is a miscompilation it's gonna be tricky to reduce it without a
reproducible testcase.

But if is a miscompilation is should be reproducible so either is not a
miscompilation or either the initial conditions are different.

> P.S. Note the stopped backtrace: this is something I see for the last
> couple of days on the native-comp branch, not sure if it's related.  I
> will report that separately.
>
> P.P.S. I tried to start another instance of Emacs from the branch, and
> it immediately displayed this:
>
>   Re-entering top level after C stack overflow
>
> Which probably means something unhealthy happens when you start Emacs
> while another instance is under a debugger with the same *.eln files
> loaded.

I often used more than one Emacs session from the same binary so at
least on GNU/Linux this does not appear to be a problem.

Thanks

  Andrea





  parent reply	other threads:[~2021-03-12  6:46 UTC|newest]

Thread overview: 115+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-11 11:27 bug#47067: 28.0.50; [feature/native-comp] Crash while scrolling through dispnew.c Eli Zaretskii
2021-03-11 12:19 ` Eli Zaretskii
2021-03-11 14:07 ` Eli Zaretskii
2021-03-12  6:46 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2021-03-12  8:10   ` Eli Zaretskii
2021-03-12 12:04     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 12:51       ` Eli Zaretskii
2021-03-12 15:27         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 15:50           ` Eli Zaretskii
2021-03-12 16:08             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 16:14               ` Eli Zaretskii
2021-03-12 19:30                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 19:48                   ` Eli Zaretskii
2021-03-12 20:21                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-13  7:11                       ` Eli Zaretskii
2021-03-13 19:51                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-13 20:07                           ` Eli Zaretskii
2021-03-13 20:20                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  7:19                               ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  8:02                                 ` Eli Zaretskii
2021-03-14  8:10                                   ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14 19:29                                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-13 19:48                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 16:23               ` Eli Zaretskii
2021-03-12 19:04                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 19:32                   ` Eli Zaretskii
2021-03-12 20:10                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-13  8:34                       ` Eli Zaretskii
2021-03-19  9:42                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-19 12:10                           ` Eli Zaretskii
2021-03-19 14:05                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-19 14:09                               ` Eli Zaretskii
2021-03-20  9:52                                 ` Eli Zaretskii
2021-03-21  8:26                                   ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-21  9:52                                     ` Eli Zaretskii
2021-03-21 11:56                                       ` Eli Zaretskii
2021-03-21 14:37                                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-21 15:34                                           ` Eli Zaretskii
2021-03-21 15:41                                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-21 15:54                                               ` Eli Zaretskii
2021-03-21 16:41                                                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-21 17:01                                                   ` Eli Zaretskii
2021-03-21 18:36                                                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-25 16:51                                                       ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-25 17:03                                                         ` Eli Zaretskii
2021-03-25 20:24                                                           ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-25 20:43                                                             ` Eli Zaretskii
2021-04-04 20:52                                                               ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-05 15:06                                                                 ` Eli Zaretskii
2021-04-05 16:09                                                                   ` Eli Zaretskii
2021-04-05 17:58                                                                     ` Eli Zaretskii
2021-04-06 13:17                                                                       ` Eli Zaretskii
2021-04-06 13:29                                                                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-06 13:53                                                                           ` Eli Zaretskii
2021-04-06 14:01                                                                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-05 18:45                                                                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-05 18:04                                                                   ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-05 18:19                                                                     ` Eli Zaretskii
2021-04-05 18:47                                                                       ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-05 19:22                                                                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-06 15:49                                                                           ` Eli Zaretskii
2021-04-06 16:06                                                                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-04-06 16:09                                                                               ` Eli Zaretskii
2021-03-21 14:36                                       ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-12 18:42         ` Pip Cet
2021-03-12 19:50           ` Eli Zaretskii
2021-03-13  8:18             ` Pip Cet
2021-03-13  8:47               ` Eli Zaretskii
2021-03-13  8:53                 ` Pip Cet
2021-03-13 11:10                   ` Eli Zaretskii
2021-03-13 11:23                     ` Eli Zaretskii
2021-03-13 11:24                     ` Pip Cet
2021-03-13 15:27                       ` Eli Zaretskii
2021-03-13 15:45                         ` Pip Cet
2021-03-13 16:21                           ` Eli Zaretskii
2021-03-13 16:32                             ` Pip Cet
2021-03-13 16:53                               ` Eli Zaretskii
2021-03-13 17:10                                 ` Pip Cet
2021-03-13 17:26                                   ` Eli Zaretskii
2021-03-13 18:55                                     ` Pip Cet
2021-03-13 19:43                                       ` Eli Zaretskii
2021-03-13 20:53                                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-13 21:00                                   ` Pip Cet
2021-03-13 21:07                                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-13 21:11                                       ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  6:07                                       ` Eli Zaretskii
2021-03-14  6:53                                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  7:21                                           ` Eli Zaretskii
2021-03-14  7:31                                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  7:48                                               ` Eli Zaretskii
2021-03-14  8:02                                                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  8:06                                                 ` Pip Cet
2021-03-14 11:39                                                   ` Eli Zaretskii
2021-03-14 11:44                                                     ` Pip Cet
2021-03-14 12:08                                                       ` Eli Zaretskii
2021-03-14 12:09                                                         ` Pip Cet
2021-03-14 12:17                                                           ` Pip Cet
2021-03-14 13:31                                                             ` Eli Zaretskii
2021-03-14 14:08                                                               ` Eli Zaretskii
2021-03-14 18:47                                                                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
     [not found]                                                                   ` <83mtv5frr4.fsf@gnu.org>
2021-03-14 20:30                                                                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-15 18:36                                                                       ` Eli Zaretskii
2021-03-15 20:17                                                                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-16 13:25                                                                           ` Eli Zaretskii
2021-03-14  8:03                                               ` Pip Cet
2021-03-14  5:55                                   ` Eli Zaretskii
2021-03-14  6:57                                     ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14  8:20                                       ` Eli Zaretskii
2021-03-13 17:09                               ` Eli Zaretskii
2021-03-14 12:17                           ` Eli Zaretskii
2021-03-14 19:00                             ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-14 19:48                               ` Eli Zaretskii
2021-03-14 20:36                                 ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-03-15  3:24                                   ` Eli Zaretskii
2021-03-13 20:03                         ` Andrea Corallo via Bug reports for GNU Emacs, the Swiss army knife of text editors

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