[gnugo-devel] "You stepped on a bug" (version 3.2)

[Corrin Lakeland]

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Hiya, I was playing a game online and noticed a under-the-stones tesuji.  I 
was curious if gnugo would spot it so tested. Gnugo missed it, but to my 
surprise it crashed.  I then downloaded gnugo 3.4 and it 
I also download 3.4.  gnugo did _not_ crash with 3.4, though it didn't find 
the tesuji either.

Attached is the output and sgf.

delilah ~ % gnugo --score aftermath lakeland-Wishfinder-20040526.sgf 
- --branch-depth 16 --backfill2-depth 7 --superstring-depth 9 --aa-depth 8 
- --owl-branch 10 --owl-reading 24 --owl-node-limit 2000 --depth 40 
- --backfill-depth 30 --fourlib-depth 10

GNU Go Version 3.2


This is GNU GO, a Go program. Contact address@hidden, or see
http://www.gnu.org/software/gnugo/ for more information.

Copyright 1999, 2000, 2001, 2002 by the Free Software Foundation.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation - version 2.

This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.  See the GNU General Public License in file COPYING
for more details.

You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111, USA.

233 black (X) move G6
234 white (O) move A4
235 black (X) move A3
236 white (O) move A5
237 black (X) move B3
238 white (O) move N12
239 black (X) move O13
240 white (O) move L1
241 black (X) move F19
242 white (O) move G19
243 black (X) move E19
244 white (O) move M1
245 black (X) move S1
246 white (O) move S7


***assertion failure:
board.c:656 - ON_BOARD1(pos) near PASS***

 (variation 1272128)
   A B C D E F G H J K L M N O P Q R S T
19 . . . X X X O . X O O . . . O . . O . 19
18 . . X . X O . X O . O . X O . O O X X 18
17 . . X X O O O O . . O O O X O X X . . 17
16 . . X + X . O X O O X X X X O O X . . 16
15 . . X X . . O X X O . X X O O . X O . 15
14 . X X . X X X X X O O O X . X O O X . 14
13 . O . X O X . X O X O X X X X . O O . 13
12 X X X X O O X X . X X X O X O O . . . 12
11 O X X O . . O X . . . X O O . . . . . 11     WHITE has captured 10 stones
10 O O X O O O O X . X X O O . X X O . . 10     BLACK has captured 10 stones
 9 O . O O X . O X . . . X O O O X . O . 9
 8 . O X X O O X . . . . . X X O . . . . 8
 7 . O X X O . X . X X . . X O O O O O . 7
 6 . O O X O O X X O O X . X X O X O X . 6
 5 O O X X X O O O O X X . . . X X X O X 5
 4 O X X X X X O X . O . X X . X O O O . 4
 3 X X . X . . X O O . O O X . X X X O O 3
 2 . . X O . X X X O . O X . X . O X X O 2
 1 . . . . . . X O O . O O X . . . . X . 1
   A B C D E F G H J K L M N O P Q R S T

gnugo 3.2 (seed 1085619388): You stepped on a bug.
Please save this game as an sgf file and mail it to address@hidden
If you can, please also include the debug output above this message.

Aborted
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lakeland-Wishfinder-20040526.sgf
Description: Text document