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Fix overflow of int32 in IndexNSG #4297

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Fix overflow of int32 in IndexNSG #4297

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2 changes: 1 addition & 1 deletion faiss/impl/NNDescent.cpp
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Expand Up @@ -400,7 +400,7 @@ void NNDescent::build(DistanceComputer& qdis, const int n, bool verbose) {
init_graph(qdis);
nndescent(qdis, verbose);

final_graph.resize(ntotal * K);
final_graph.resize(uint64_t(ntotal) * K);

// Store the neighbor link structure into final_graph
// Clear the old graph
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