tiyn/yeschess
1
0
Fork 0
mirror of https://github.com/tiyn/yeschess.git synced 2025-04-03 15:37:46 +02:00
Code Issues Projects Releases Wiki Activity

bugfix: threefold repitition throws nullpointer

Browse Source 
If the threefold repitition check is called before enough moves
are saved in the previous board state it throws a nullpointer.
A simple null check solves the problem
This commit is contained in:
TiynGER 2021-05-01 01:54:16 +02:00
parent 91281d97a7
commit 5bee0f84d2
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/chess.nim
View File

@ -810,6 +810,8 @@ proc isCheckmate*(game: Game, color: Color): bool =
proc threeMoveRep(game: Game): bool = proc threeMoveRep(game: Game): bool =
## Returns true if a 3-fold repitition happened on the last move of the ## Returns true if a 3-fold repitition happened on the last move of the
## `game`. ## `game`.
if game.previousBoard == []:
return false
var lastState = game.previousBoard[game.previousBoard.high] var lastState = game.previousBoard[game.previousBoard.high]
var lastCastleRights = game.previousCastleRights[game.previousBoard.high] var lastCastleRights = game.previousCastleRights[game.previousBoard.high]
var reps = 0 var reps = 0