From: Stephen Berman <stephen.berman@gmx.net>
To: martin rudalics <rudalics@gmx.at>
Cc: 9006@debbugs.gnu.org
Subject: bug#9006: 24.0.50; Abort in unshow_buffer/kill-buffer
Date: Mon, 11 Jul 2011 22:04:35 +0200 [thread overview]
Message-ID: <87hb6sr3cc.fsf@escher.fritz.box> (raw)
In-Reply-To: <4E1B4B7F.8090500@gmx.at> (martin rudalics's message of "Mon, 11 Jul 2011 21:14:07 +0200")
On Mon, 11 Jul 2011 21:14:07 +0200 martin rudalics <rudalics@gmx.at> wrote:
>> I applied the patch and rebuilt Emacs, then started with my
>> initializations under gdb. Emacs came up fine, then I type C-h C-a and
>> it aborted in unshow_buffer; the backtrace is almost identical to the
>> one I posted previously.
>
> Why am I not surprised? Though, it doesn't abort here.
Puzzling; I discovered today that I also get the abort with that patch
just by starting emacs -Q, evalling (with-temp-buffer (vertical-motion
1)), then typing C-h C-a.
>> Then I started Emacs again, started Gnus, as
>> with your first suggested patch with set_marker_both (w->buffer, BEG,
>> BEGV)
>
> I suppose you mean set_marker_both (w->pointm, w->buffer, BEG, BEGV)
> here.
Yes, sorry for the typo.
>> the display was unstable (unselected window at first blank, then
>> blank fringe), then tried `h' and it worked a few times but the response
>> was slow, and then (after `h' not C-g) Emacs aborted in unshow_buffer;
>> backtrace below. Just out of curiosity (since I don't understand the
>> code), I rebuilt again with the following call (old_buffer instead of
>> w->buffer):
>>
>> set_marker_both
>> (w->pointm, old_buffer, BUF_PT (current_buffer), BUF_PT_BYTE (current_buffer));
>>
>> This did not cause an abort with C-h C-a nor with h in Gnus, but it
>> showed the same problem of point in the non-selected window jumping to
>> point-min, despite not passing BEG and BEGV.
>
> The strange thing about this is that when old_buffer is not the current
> buffer, this will set the marker in the wrong buffer which should cause
> an abort. But as I stated earlier I'm still completely lost here :-(
>
> Anyway, I attached another patch. Things are getting more and more
> complicated because I have zero experience working with markers in C.
I applied it and rebuilt, and so far things look good: display is
normal, C-h C-a works fine, and in Gnus both h and and C-x o don't move
point in the non-selected buffer. In short, this looks like a good
fix -- thanks! I'll keep running under gdb and let you know if anything
surprising happens. Bar that, I think you should install this, unless
someone has a good reason to object.
Steve Berman
next prev parent reply other threads:[~2011-07-11 20:04 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-05 23:20 bug#9006: 24.0.50; Abort in unshow_buffer/kill-buffer Stephen Berman
2011-07-06 9:25 ` martin rudalics
2011-07-06 19:19 ` Stephen Berman
2011-07-07 8:23 ` martin rudalics
2011-07-07 9:32 ` Stephen Berman
2011-07-07 15:47 ` martin rudalics
2011-07-08 23:03 ` Stephen Berman
2011-07-09 8:44 ` martin rudalics
2011-07-09 11:57 ` Stephen Berman
2011-07-09 13:01 ` martin rudalics
2011-07-09 16:27 ` Stephen Berman
2011-07-09 16:54 ` Stephen Berman
2011-07-10 8:59 ` martin rudalics
2011-07-10 10:25 ` Stephen Berman
2011-07-10 13:30 ` martin rudalics
2011-07-10 20:31 ` Stephen Berman
2011-07-11 19:14 ` martin rudalics
2011-07-11 20:04 ` Stephen Berman [this message]
2011-07-12 8:36 ` martin rudalics
2011-07-12 8:51 ` Stephen Berman
2011-07-13 6:53 ` Stephen Berman
2011-07-13 7:24 ` Eli Zaretskii
2011-07-13 8:00 ` Stephen Berman
2011-07-13 10:03 ` Eli Zaretskii
2011-07-13 11:40 ` Stephen Berman
2011-07-13 8:37 ` martin rudalics
2011-07-13 10:05 ` Eli Zaretskii
2011-07-13 11:54 ` martin rudalics
2011-07-13 12:20 ` Stephen Berman
2011-07-13 11:39 ` Stephen Berman
2011-07-14 8:35 ` martin rudalics
2011-07-15 21:05 ` Stephen Berman
2011-07-10 8:58 ` martin rudalics
2011-07-09 12:44 ` Stephen Berman
2011-07-09 13:01 ` martin rudalics
2011-07-09 17:31 ` Eli Zaretskii
2011-07-10 8:59 ` martin rudalics
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