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Avoid dereferencing iterators over empty indexed data values

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It seems the values can be empty even if size of blocks
is non-zero (e.g. blocks.size()==1)
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Mateusz Łoskot 2020-11-23 21:21:35 +01:00
parent a3f1c2afb0
commit 58fbda0483
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1 changed files with 3 additions and 0 deletions
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include/util/indexed_data.hpp
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@ -331,6 +331,9 @@ template <typename GroupBlockPolicy, storage::Ownership Ownership> struct Indexe
// Return value at the given index // Return value at the given index
ResultType at(std::uint32_t index) const ResultType at(std::uint32_t index) const
{ {
if (values.empty())
return ResultType();
// Get block external ad internal indices // Get block external ad internal indices
const BlocksNumberType block_idx = index / (BLOCK_SIZE + 1); const BlocksNumberType block_idx = index / (BLOCK_SIZE + 1);
const std::uint32_t internal_idx = index % (BLOCK_SIZE + 1); const std::uint32_t internal_idx = index % (BLOCK_SIZE + 1);