Gunnar Farnebäck wrote: > Felix wrote: > >>I can indeed reproduce the bug. > That's good. Then we have a reasonable chance to track it down. <snip> > Ah, no, the backtrace we ask for is something different. > Usually you would do like this: > gdb gnugo > run > <play as usual until crash> > bt <snip> > Now you should have a binary in interface/gnugo and can continue with > the backtrace instructions, starting with "gdb interface/gnugo". > /Gunnar
Ah, that kind of backtrace. I haven't used gdb (or any other debugger) before, even though I'm an occasional C/C++/Perl programmer. I've attached a log of the backtrace. I also attached a log of the errors and warnings (everything sent to STDERR) during make. I found that the compile log contained errors like this one: owl.c:4867: warning: comparison is always true due to limited range of data type The same errors can be found in the debian build log for PPC: http://buildd.debian.org/build.php?pkg=gnugo I also compiled the same source on Mac OS X (running in MOL on the same Mac Mini), which did not result in the same errors. The problem seems to be signedness. I edited owl.c and changed char to signed char on lines 221, 4639, 4727, 4728 and 4863. Then I recompiled gnugo. After that a quick test seems to indicate the bug is gone. This fix is probable a bit to simple, and I haven't read the entire code (or even the entire file owl.c), but this should help you fix it. I'd appreciate it if you'd let me know whether this signedness problem is a bug in gnugo or in gcc. I'm not sure whether chars are meant to be signed or unsigned by default Regards, Felix -- Felix C. Stegerman <[EMAIL PROTECTED]> "Any sufficiently advanced bug is indistiguishable from a feature." -- R. Kulawiec
$ gdb interface/gnugo GNU gdb 6.3-debian Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "powerpc-linux"...Using host libthread_db library "/lib/tls/libthread_db.so.1". (gdb) run Starting program: /data/felix/tmp/gnugo/gnugo-3.7.5/interface/gnugo GNU Go 3.7.5 Copyright 1999, 2000, 2001, 2002, 2003, 2004 and 2005 by the Free Software Foundation, Inc. See http://www.gnu.org/software/gnugo/ or contact [EMAIL PROTECTED] for information about GNU Go. GNU Go comes with NO WARRANTY to the extent permitted by law. 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. For more information about these matters, see the files named COPYING. Beginning ASCII mode game. Board Size: 19 Handicap 0 Komi: 0.0 Move Number: 0 To Move: black Computer player: White White (O) has captured 0 pieces Black (X) has captured 0 pieces A B C D E F G H J K L M N O P Q R S T 19 . . . . . . . . . . . . . . . . . . . 19 18 . . . . . . . . . . . . . . . . . . . 18 17 . . . . . . . . . . . . . . . . . . . 17 16 . . . + . . . . . + . . . . . + . . . 16 15 . . . . . . . . . . . . . . . . . . . 15 14 . . . . . . . . . . . . . . . . . . . 14 13 . . . . . . . . . . . . . . . . . . . 13 12 . . . . . . . . . . . . . . . . . . . 12 11 . . . . . . . . . . . . . . . . . . . 11 10 . . . + . . . . . + . . . . . + . . . 10 9 . . . . . . . . . . . . . . . . . . . 9 8 . . . . . . . . . . . . . . . . . . . 8 7 . . . . . . . . . . . . . . . . . . . 7 6 . . . . . . . . . . . . . . . . . . . 6 5 . . . . . . . . . . . . . . . . . . . 5 4 . . . + . . . . . + . . . . . + . . . 4 3 . . . . . . . . . . . . . . . . . . . 3 2 . . . . . . . . . . . . . . . . . . . 2 1 . . . . . . . . . . . . . . . . . . . 1 A B C D E F G H J K L M N O P Q R S T black(1): c4 White (O) has captured 0 pieces Black (X) has captured 0 pieces A B C D E F G H J K L M N O P Q R S T Last move: Black C4 19 . . . . . . . . . . . . . . . . . . . 19 18 . . . . . . . . . . . . . . . . . . . 18 17 . . . . . . . . . . . . . . . . . . . 17 16 . . . + . . . . . + . . . . . + . . . 16 15 . . . . . . . . . . . . . . . . . . . 15 14 . . . . . . . . . . . . . . . . . . . 14 13 . . . . . . . . . . . . . . . . . . . 13 12 . . . . . . . . . . . . . . . . . . . 12 11 . . . . . . . . . . . . . . . . . . . 11 10 . . . + . . . . . + . . . . . + . . . 10 9 . . . . . . . . . . . . . . . . . . . 9 8 . . . . . . . . . . . . . . . . . . . 8 7 . . . . . . . . . . . . . . . . . . . 7 6 . . . . . . . . . . . . . . . . . . . 6 5 . . . . . . . . . . . . . . . . . . . 5 4 . .(X)+ . . . . . + . . . . . + . . . 4 3 . . . . . . . . . . . . . . . . . . . 3 2 . . . . . . . . . . . . . . . . . . . 2 1 . . . . . . . . . . . . . . . . . . . 1 A B C D E F G H J K L M N O P Q R S T GNU Go is thinking... white(2): Q4 White (O) has captured 0 pieces Black (X) has captured 0 pieces A B C D E F G H J K L M N O P Q R S T Last move: White Q4 19 . . . . . . . . . . . . . . . . . . . 19 18 . . . . . . . . . . . . . . . . . . . 18 17 . . . . . . . . . . . . . . . . . . . 17 16 . . . + . . . . . + . . . . . + . . . 16 15 . . . . . . . . . . . . . . . . . . . 15 14 . . . . . . . . . . . . . . . . . . . 14 13 . . . . . . . . . . . . . . . . . . . 13 12 . . . . . . . . . . . . . . . . . . . 12 11 . . . . . . . . . . . . . . . . . . . 11 10 . . . + . . . . . + . . . . . + . . . 10 9 . . . . . . . . . . . . . . . . . . . 9 8 . . . . . . . . . . . . . . . . . . . 8 7 . . . . . . . . . . . . . . . . . . . 7 6 . . . . . . . . . . . . . . . . . . . 6 5 . . . . . . . . . . . . . . . . . . . 5 4 . . X + . . . . . + . . . . .(O). . . 4 3 . . . . . . . . . . . . . . . . . . . 3 2 . . . . . . . . . . . . . . . . . . . 2 1 . . . . . . . . . . . . . . . . . . . 1 A B C D E F G H J K L M N O P Q R S T black(3): r4 White (O) has captured 0 pieces Black (X) has captured 0 pieces A B C D E F G H J K L M N O P Q R S T Last move: Black R4 19 . . . . . . . . . . . . . . . . . . . 19 18 . . . . . . . . . . . . . . . . . . . 18 17 . . . . . . . . . . . . . . . . . . . 17 16 . . . + . . . . . + . . . . . + . . . 16 15 . . . . . . . . . . . . . . . . . . . 15 14 . . . . . . . . . . . . . . . . . . . 14 13 . . . . . . . . . . . . . . . . . . . 13 12 . . . . . . . . . . . . . . . . . . . 12 11 . . . . . . . . . . . . . . . . . . . 11 10 . . . + . . . . . + . . . . . + . . . 10 9 . . . . . . . . . . . . . . . . . . . 9 8 . . . . . . . . . . . . . . . . . . . 8 7 . . . . . . . . . . . . . . . . . . . 7 6 . . . . . . . . . . . . . . . . . . . 6 5 . . . . . . . . . . . . . . . . . . . 5 4 . . X + . . . . . + . . . . . O(X). . 4 3 . . . . . . . . . . . . . . . . . . . 3 2 . . . . . . . . . . . . . . . . . . . 2 1 . . . . . . . . . . . . . . . . . . . 1 A B C D E F G H J K L M N O P Q R S T GNU Go is thinking... ***assertion failure: owl.c:4667 - num_components > 0 near PASS*** W:R5 B:R3 W:P4 B:S5 W:R6 B:S6 W:R2 B:R7 W:S8 A B C D E F G H J K L M N O P Q R S T 19 . . . . . . . . . . . . . . . . . . . 19 18 . . . . . . . . . . . . . . . . . . . 18 17 . . . . . . . . . . . . . . . . . . . 17 16 . . . + . . . . . + . . . . . + . . . 16 15 . . . . . . . . . . . . . . . . . . . 15 14 . . . . . . . . . . . . . . . . . . . 14 13 . . . . . . . . . . . . . . . . . . . 13 12 . . . . . . . . . . . . . . . . . . . 12 11 . . . . . . . . . . . . . . . . . . . 11 WHITE (O) has captured 0 stones 10 . . . + . . . . . + . . . . . + . . . 10 BLACK (X) has captured 0 stones 9 . . . . . . . . . . . . . . . . . . . 9 8 . . . . . . . . . . . . . . . . . O . 8 7 . . . . . . . . . . . . . . . . X . . 7 6 . . . . . . . . . . . . . . . . O X . 6 5 . . . . . . . . . . . . . . . . O X . 5 4 . . X + . . . . . + . . . . O O X . . 4 3 . . . . . . . . . . . . . . . . X . . 3 2 . . . . . . . . . . . . . . . . O . . 2 1 . . . . . . . . . . . . . . . . . . . 1 A B C D E F G H J K L M N O P Q R S T (;GM[1]FF[4]SZ[19]KM[0.0]GN[GNU Go 3.7.5 stepped on a bug] ;B[cp];W[pp];B[qp] ) gnugo 3.7.5 (seed 1128606855): You stepped on a bug. Please mail this message, including the debug output above, to [EMAIL PROTECTED] Program received signal SIGABRT, Aborted. 0x0fe3b590 in raise () from /lib/tls/libc.so.6 (gdb) bt #0 0x0fe3b590 in raise () from /lib/tls/libc.so.6 #1 0x0fe3cf8c in abort () from /lib/tls/libc.so.6 #2 0x10053874 in abortgo (file=Variable "file" is not available. ) at printutils.c:296 #3 0x10049ee0 in do_owl_attack (str=271581184, move=0x0, wormid=0x7fb08a20, owl=0x1053c5b8, escape=2) at owl.c:4667 #4 0x10048bb4 in do_owl_defend (str=337, move=0x0, wormid=0x7fb09490, owl=0x105332d0, escape=2) at owl.c:2677 #5 0x10049f04 in do_owl_attack (str=337, move=0x0, wormid=0x7fb09f30, owl=0x10529f80, escape=2) at owl.c:2106 #6 0x10048bb4 in do_owl_defend (str=337, move=0x0, wormid=0x7fb0a9a0, owl=0x10520ce8, escape=1) at owl.c:2677 #7 0x10049f04 in do_owl_attack (str=337, move=0x0, wormid=0x7fb0b440, owl=0x105179c8, escape=1) at owl.c:2106 #8 0x10048bb4 in do_owl_defend (str=337, move=0x0, wormid=0x7fb0beb0, owl=0x1050e728, escape=1) at owl.c:2677 #9 0x10049f04 in do_owl_attack (str=337, move=0x0, wormid=0x7fb0c950, owl=0x105054f8, escape=1) at owl.c:2106 #10 0x10048bb4 in do_owl_defend (str=337, move=0x0, wormid=0x7fb0d3c0, owl=0x104fc260, escape=0) at owl.c:2677 #11 0x10049f04 in do_owl_attack (str=337, move=0x7fb0de50, wormid=0x7fb0de58, owl=0x104f2fa8, escape=0) at owl.c:2106 #12 0x1004f910 in owl_attack (target=337, attack_point=0x7fb0deb0, certain=0x104f199c, kworm=0x7fb0dea8) at owl.c:1737 #13 0x100291a8 in make_dragons (stop_before_owl=0) at dragon.c:229 #14 0x1002ab7c in examine_position (how_much=99) at genmove.c:151 #15 0x1002b094 in do_genmove (color=337, pure_threat_value=0.400000006, allowed_moves=0x0, value=0x104132c8, resign=0x10300000) at genmove.c:347 #16 0x1002be70 in genmove (color=Variable "color" is not available. ) at genmove.c:245 #17 0x1003337c in gnugo_genmove (i=0x7fb0f888, j=0x7fb0f88c, color=Variable "color" is not available. ) at interface.c:293 #18 0x10004794 in computer_move (gameinfo=0x7fb0ffec, passes=0x7fb0f914) at play_ascii.c:467 #19 0x10004a94 in do_move (gameinfo=0x7fb0ffec, command=Variable "command" is not available. ) at play_ascii.c:542 #20 0x10004fe8 in play_ascii (tree=0x7fb0ffdc, gameinfo=0x7fb0ffec, filename=Variable "filename" is not available. ) at play_ascii.c:819 #21 0x1000238c in main (argc=1, argv=0x7fb142e4) at main.c:1436 (gdb) q The program is running. Exit anyway? (y or n) y
owl.c: In function 'connected_components': owl.c:4652: warning: comparison is always false due to limited range of data type owl.c:4660: warning: comparison is always false due to limited range of data type owl.c: In function 'componentdump': owl.c:4867: warning: comparison is always true due to limited range of data type --------------------------- DFA for aa_attackpat size: 3 kB for 26 patterns (340 states) --------------------------- --------------------------- DFA for owl_attackpat size: 93 kB for 394 patterns (9363 states) --------------------------- --------------------------- DFA for owl_vital_apat size: 10 kB for 56 patterns (1004 states) --------------------------- --------------------------- DFA for owl_defendpat size: 117 kB for 489 patterns (11853 states) --------------------------- uncompress_fuseki.c: In function 'main': uncompress_fuseki.c:269: warning: pointer targets in passing argument 2 of 'set_boards' differ in signedness uncompress_fuseki.c:274: warning: pointer targets in passing argument 2 of 'set_boards' differ in signedness --------------------------- corner database for joseki size: 179 kB for 1622 patterns (8673 variations) ---------------------------
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