Fix a Crash: check for invalid square at isAttackedBy() (bitboard.h) #106
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This commit Fixes the following crash scenario:
In Menus:
Click Edit | Setup Position...
Click Clear
Click on White King
CRASH
This commit checks in advance for InvalidSquare in function is AttackedBy().
The crash was: If a King is removed its square is set to InvalidSquare, Later when checking if that square is attacked we have a crash of accessing index beyond the board size.