Dear Kenichi,
----- Kenichi Handa (2007-04-13) wrote:-----
>> Here is a backtrace of an Emacs crash. One can encounter this often
>> by moving cursor over links etc. It only happens when using xft font.
>
>> Software: GNU Emacs 23.0.0.11 (i686-pc-linux-gnu, X toolkit) of
>> 2007-04-11
>
>> [2 xft_crash.log <text/plain (7bit)>]
>> Program received signal SIGSEGV, Segmentation fault.
> [...]
>> (gdb) bt full
>> #0 0x081b3df2 in xftfont_draw (s=0xbfb8f4f0, from=0, to=1, x=387, y=275,
>> with_background=0) at xftfont.c:501
>> f = (FRAME_PTR) 0x8c75490
>> face = (struct face *) 0xa9a08c8
>> xftface_info = (struct xftface_info *) 0x0
>
> The crash is because xftface_info is NULL, but I can't
> reproduce it. My Emacs configuration is almost the same as
> yours.
>
> GNU Emacs 23.0.0.30 (i686-pc-linux-gnu, X toolkit, Xaw3d
> scroll bars) of 2007-04-13 on etlken
>
> I run configure with "--enable-font-backend", and start
> emacs with "--enable-font-backend". As you said you are
> using Xft font, I think you did the same. Can't you show me
> the exact operation to produce that bug by starting Emacs
> with "-Q --enable-font-backend -fn SOMEFONT"?
>
> ---
> Kenichi Handa
> [EMAIL PROTECTED]
It happens usually when there are many links in a buffer such as in ERC
or W3M. I can move around mouse in a w3m buffer with tons of links (such
as www.6park.com) to catch a crash, which usually happens within a few
minutes. I just catch one with 'emacs -Q'. Unfortunately I don't know
the exact recipe to trigger a crash.
The following can help you see the bug although it won't crash Emacs:
o emacs -Q --enable-font-backend -fn SOMEFONT
o C-u 3 2 M-x hanoi
You should see the frame flickering like TV disturbed by static. Also
you can see CPU usage by Xorg and Emacs increased as follows:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
28208 root 15 0 283m 82m 8140 S 69.6 8.4 21:22.20 Xorg
23199 leo 15 0 23284 15m 5964 R 6.5 1.6 0:00.64 emacs
I tested this in latest source: GNU Emacs 23.0.0.12 (i686-pc-linux-gnu,
X toolkit) of 2007-04-13 on Fedora 6.
HTH
--
Leo <sdl.web AT gmail.com> (GPG Key: 9283AA3F)
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