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Fix false TT hits for zero verification keys #1128

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Fix false TT hits for zero verification keys #1128

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10 changes: 10 additions & 0 deletions src/transposition.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -193,6 +193,11 @@ impl TranspositionTable {
};

let key = verification_key(hash);

if key.0 == 0 {
return None;
}

let index = cluster.lookup_key(key);

if index < cluster.entries.len() {
Expand Down Expand Up @@ -227,6 +232,11 @@ impl TranspositionTable {
};

let key = verification_key(hash);

if key.0 == 0 {
return;
}

let tt_age = self.age();

let replacement_index = {
Expand Down