Re: [gnugo-devel] Error in gnugo 3.9.1

[Gunnar Farnebäck]

On 01/23/11 23:06, Gunnar Farnebäck wrote:
> On 01/22/11 19:18, Kőri Gábor wrote:
> > Hi,
> >
> > I found an error in the latest official release in use gnugo. I
> > attached the SGF file of the game. Gnugo plays as black. When the
> > level of the bot set to 9, 10, 11 or 12, then gnugo crashes.
>
> Thanks for the report.
>
> Unfortunately I'm not able to reproduce the crash. Can you describe
> your platform, build flags, runtime options, and the exact error
> message in case the crash is due to an assertion failure?

Thanks to further off-list assistance from Kőri we now have a
reproducible testcase and indications from valgrind that uninitialized
memory gets into the semeai reading, leading to corrupted data
structures and eventually a segmentation fault.

See http://trac.gnugo.org/gnugo/ticket/228 for details.

/Gunnar