This is the mail archive of the
cygwin-xfree
mailing list for the Cygwin XFree86 project.
Re: AW: 1.9.2.0: Xwin SIGSEGV when font server should be queried
On 08/11/2010 14:11, Weeber, Burkhard wrote:
> I did a bit of further reseach.
>
> It looks like it does not have anything to do with the way the font server is queried,
> but rather the way the startup is done.
>
> When I have the font server added during the XWin startup - either in the startxwin.bat, or a bash-script I call from there, the XWin SIGSEGVs.
>
> When I let the XWin come up with a few of my fav screens, and I then add the font server either from a cygwin shell or from a client shell the font server is subsequently queried correctly and the SIGSEGV does not appear.
>
> Strange.
>
> Anyway.
> Thanks for the exe to create a full stack trace.
> Here it is:
> (gdb) bt full
> #0 0x005b56a2 in doListFontsWithInfo (client=0x10981dc8, c=0x108693f0)
Thanks for obtaining this backtrace.
With this and the startup script you posted, I have managed to reproduce the
problem.
It looks like this has been caused by the changes in Xserver 1.9 to fix a
different bug with xfs [1]. The problem is a use-after-free, so that probably
explains why it sometimes works if you do things in a different order.
I noticed that setup is only offering a choice of 1.9.0-2 or 1.9.2-1, which
isn't a very smart thing to do, so I've rearranged things so now 1.8.2-1
should be offered as the previous version.
[1] https://bugs.freedesktop.org/show_bug.cgi?id=3040
--
Jon TURNEY
Volunteer Cygwin/X X Server maintainer
--
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Problem reports: http://cygwin.com/problems.html
Documentation: http://x.cygwin.com/docs/
FAQ: http://x.cygwin.com/docs/faq/