Re: [gnugo-devel] Bug: GTP boardsize does not clear move stack

[Daniel Bump]

> Hello,
> 
> I found a small bug when using GnuGo 3.1.12 in GTP mode.
> When I start a new game with the "boardsize" command,
> the index to the move stack is not reset.
> 
> This causes "undo" commands in the new game to fail,
> since "undo" restores the position from the move stack
> and the move stack can contain illegal sequences of moves
> from the new and the old game.
> 
> - Markus

Presumably the following patch should fix that. I haven't
tested it but I can't imagine that it will break anything.
Setting the board size should reset the engine.

Dan



RCS file: /cvsroot/gnugo/gnugo/interface/play_gtp.c,v
retrieving revision 1.40
diff -u -r1.40 play_gtp.c
--- interface/play_gtp.c        2001/11/06 16:36:51     1.40
+++ interface/play_gtp.c        2001/11/06 17:14:10
@@ -320,6 +320,8 @@
   board_size = boardsize;
   clear_board();
   gtp_internal_set_boardsize(boardsize);
+  reset_engine();
+  move_stack_pointer = 0;
   store_position(&starting_position);
   return gtp_success(id, "");
 }