X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fbitboard.h;h=7ae1effd9487f036407f3429c8a5047ec6f52023;hp=a813ea12b3cc73a0fd5d2b8df2650e15959f8289;hb=2af2c67650c4ac2531e6ab2753830f91c0999876;hpb=a03e98dcd33c91c47e4a06282bfb582e582671b7

diff --git a/src/bitboard.h b/src/bitboard.h
index a813ea12..7ae1effd 100644
--- a/src/bitboard.h
+++ b/src/bitboard.h
@@ -107,22 +107,27 @@ extern Magic BishopMagics[SQUARE_NB];
 /// whether a given bit is set in a bitboard, and for setting and clearing bits.
 
 inline Bitboard operator&(Bitboard b, Square s) {
+  assert(s >= SQ_A1 && s <= SQ_H8);
   return b & SquareBB[s];
 }
 
 inline Bitboard operator|(Bitboard b, Square s) {
+  assert(s >= SQ_A1 && s <= SQ_H8);
   return b | SquareBB[s];
 }
 
 inline Bitboard operator^(Bitboard b, Square s) {
+  assert(s >= SQ_A1 && s <= SQ_H8);
   return b ^ SquareBB[s];
 }
 
 inline Bitboard& operator|=(Bitboard& b, Square s) {
+  assert(s >= SQ_A1 && s <= SQ_H8);
   return b |= SquareBB[s];
 }
 
 inline Bitboard& operator^=(Bitboard& b, Square s) {
+  assert(s >= SQ_A1 && s <= SQ_H8);
   return b ^= SquareBB[s];
 }