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bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs
From: |
Michael Welsh Duggan |
Subject: |
bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs |
Date: |
Wed, 07 Apr 2021 15:25:16 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
Michael Welsh Duggan <mwd@cert.org> writes:
> Michael Welsh Duggan <mwd@cert.org> writes:
>
>> martin rudalics <rudalics@gmx.at> writes:
>>
>>> > Don't know where to go from here, but I have a breakpoint set on
>>> >
>>> > replace_buffer_in_windows_safely_count = 0;
>>> >
>>> > conditioned on count != 0.
>>>
>>> Good. IIUC this
>>>
>>> > (gdb) p list_length(Vwindow_list)
>>> > $2 = 2
>>>
>>> and this
>>>
>>> > (gdb) xlist
>>> > $13 = 0x1a
>>> > Lisp_Int0
>>> > $14 = 6
>>>
>>> together indicate that Vwindow_list spontaneously shrinks from 6 to 2
>>> elements (which is "impossible" as we know already). Attaching the next
>>> patch which should catch this situation automatically. It will still be
>>> of no help because we won't catch the one that apparently clobbers that
>>> list but hopefully more useful than the previous diff.
Using watchpoints on Vwindow_list that are turned off when in
window_list() and ignored when it is set to nil, I was at least able to
determine that whatever is modifying the list is doing so destructively,
not by setting a new value.
--
Michael Welsh Duggan
(mwd@cert.org)
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, (continued)
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Michael Welsh Duggan, 2021/04/06
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Andreas Schwab, 2021/04/07
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, martin rudalics, 2021/04/07
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Michael Welsh Duggan, 2021/04/07
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, martin rudalics, 2021/04/07
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Michael Welsh Duggan, 2021/04/07
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, martin rudalics, 2021/04/07
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Michael Welsh Duggan, 2021/04/07
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Michael Welsh Duggan, 2021/04/07
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Michael Welsh Duggan, 2021/04/07
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs,
Michael Welsh Duggan <=
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, martin rudalics, 2021/04/07
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Michael Welsh Duggan, 2021/04/07
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, martin rudalics, 2021/04/08
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Gregory Heytings, 2021/04/08
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Eli Zaretskii, 2021/04/08
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Andreas Schwab, 2021/04/08
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Eli Zaretskii, 2021/04/08
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Gregory Heytings, 2021/04/08
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Eli Zaretskii, 2021/04/08
- bug#47244: 28.0.50; SIGSEGV in long-runnning Emacs, Gregory Heytings, 2021/04/08