From: "Jan Djärv" <jan.h.d@swipnet.se>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Jules Colding <colding@venalicium.dk>, 16049@debbugs.gnu.org
Subject: bug#16049: 24.3.50; Crash on startup on Mac OS X 10.9
Date: Fri, 6 Dec 2013 19:32:56 +0100 [thread overview]
Message-ID: <04BC6316-338E-4025-A9CC-006F576051C1@swipnet.se> (raw)
In-Reply-To: <837gbj2gp0.fsf@gnu.org>
Hello.
5 dec 2013 kl. 21:20 skrev Eli Zaretskii <eliz@gnu.org>:
>> From: Jan Djärv <jan.h.d@swipnet.se>
>> Date: Thu, 5 Dec 2013 20:59:00 +0100
>> Cc: martin rudalics <rudalics@gmx.at>,
>> Jules Colding <colding@venalicium.dk>,
>> 16049@debbugs.gnu.org
>>
>> (gdb) p desired_matrix->nrows
>> $1 = -306783372
>>
>> This is not random, I get the same value each time. Overflow?
>
> Put a watchpoint on that address, and see who gives it such a bogus
> value.
The root cause is grow_mini_window in window.c.
It sets w->pixel_height to a large negative value, and it is all downhill from there.
It is called twice. Right before w->pixel_height += pixel_height;
the values for pixelwise, w->pixel_height, pixel_height, line_height, FRAME_LINE_HEIGTH(f), delta and XINT (height) are:
1 1 -47 -3 14 13 47
The 1 for w->pixel_height looks wrong.
This will set w->pixel_height to -46.
The second call:
1 -46 -2147483603 .153391685 14 60 0
I'm not sure how this function is supposed to work. pixel_value is negative or it is a huge positive value. Is it relying on overflow?
Jan D.
next prev parent reply other threads:[~2013-12-06 18:32 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-04 14:06 bug#16049: 24.3.50; Crash on startup on Mac OS X 10.9 Jules Colding
2013-12-04 14:39 ` martin rudalics
2013-12-04 16:44 ` Jan Djärv
2013-12-04 18:06 ` martin rudalics
2013-12-04 19:39 ` Jules Colding
2013-12-05 7:00 ` martin rudalics
2013-12-05 6:01 ` Jan Djärv
2013-12-05 7:00 ` martin rudalics
2013-12-05 17:35 ` Jan Djärv
2013-12-05 17:43 ` Jan Djärv
2013-12-05 18:13 ` martin rudalics
2013-12-05 19:55 ` Jan Djärv
2013-12-05 18:19 ` Eli Zaretskii
2013-12-05 19:59 ` Jan Djärv
2013-12-05 20:20 ` Eli Zaretskii
2013-12-06 18:32 ` Jan Djärv [this message]
2013-12-06 18:56 ` martin rudalics
2013-12-07 8:25 ` bug#16049: 24.3.50; xdisp.c infloop " Jan Djärv
2013-12-07 9:16 ` Eli Zaretskii
2013-12-07 14:26 ` Jan Djärv
2013-12-07 14:42 ` martin rudalics
2013-12-07 14:57 ` Jules Colding
2013-12-07 15:57 ` Jules Colding
2013-12-05 17:59 ` bug#16049: 24.3.50; Crash on startup " martin rudalics
2013-12-05 18:20 ` Eli Zaretskii
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