https://clickhouse-test-reports.s3.yandex.net/21020/2ced21c837006053542b9f04c338faebf504f413/fuzzer_asan/server.log
{
        if (!nulls_position.has_value())
            nulls_position = parent.data->blocks_nullmaps.begin();
        auto end = parent.data->blocks_nullmaps.end();
        for (auto & it = *nulls_position; it != end && rows_added < max_block_size; ++it)
        {
            const Block * block = it->first;
            const NullMap & nullmap = assert_cast<const ColumnUInt8 &>(*it->second).getData();
            for (size_t row = 0; row < nullmap.size(); ++row)
            {
                if (nullmap[row])
                {
                    for (size_t col = 0; col < columns_keys_and_right.size(); ++col)
                        columns_keys_and_right[col]->insertFrom(*block->getByPosition(col).column, row);
                    ++rows_added;
                }
            }
        }
    }
};
BlockInputStreamPtr HashJoin::createStreamWithNonJoinedRows(const Block & result_sample_block, UInt64 max_block_size) const