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pasky / pachi

A fairly strong Go/Baduk/Weiqi playing program
http://pachi.or.cz/
GNU General Public License v2.0
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segfault or assertion failures with 9x9 and free handicap #86

Closed dvdkhlng closed 5 years ago

dvdkhlng commented 5 years ago

Hi,

the following sequence of GTP commands crashes pachi (master):

/usr/local/bin/pachi -d3 --nodcnn -t =40000 -f book.dat threads=4,maximize_score

boardsize 9
set_free_handicap C3 G7 C7
komi 0
genmove w

pachi: ../board.h:629: board_get_atari_neighbor: Assertion `coord != pass' failed.

with the following command line I get a segfault:

/usr/local/bin/pachi -d3 --nodcnn -t 10 -f book.dat threads=4,maximize_score

Thread 7 "pachi" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffb2dac700 (LWP 10855)]
0x00005555555a9c3e in ?? ()
(gdb) bt
#0  0x00005555555a9c3e in ?? ()
#1  0x00005555555856d0 in playout_play_move ()
#2  0x0000555555585926 in playout_play_game ()
#3  0x000055555558c595 in uct_mcowner_playouts ()
#4  0x0000555555591543 in ?? ()
#5  0x00007ffff652f494 in start_thread (arg=0x7fffb2dac700)
at pthread_create.c:333
#6  0x00007ffff6271acf in clone ()
dvdkhlng commented 5 years ago

Ok, I think this is related to using an opening book. Seems that without "-f book.dat" pachi runs fine.

lemonsqueeze commented 5 years ago

Strange, couldn't replicate this one even with old code. Is this still happening ? If so, please reopen issue.