**Describe the bug**
```
SELECT number % 100 AS k, sumArray(emptyArrayUInt8()) AS v FROM numbers(10) GROUP BY k
```
Fails under ASan.

{
    String tmp_path = params.tmp_volume->getDisk()->getPath();
    return writeToTemporaryFile(data_variants, tmp_path);
}
template <typename Method>
Block Aggregator::convertOneBucketToBlock(
    AggregatedDataVariants & data_variants,
    Method & method,
    bool final,
    size_t bucket) const
{
    Block block = prepareBlockAndFill(data_variants, final, method.data.impls[bucket].size(),
        [bucket, &method, this] (
            MutableColumns & key_columns,
            AggregateColumnsData & aggregate_columns,
            MutableColumns & final_aggregate_columns,
            Arena * arena,
            bool final_)
        {
            convertToBlockImpl(method, method.data.impls[bucket],
                key_columns, aggregate_columns, final_aggregate_columns, arena, final_);
        });
    block.info.bucket_num = bucket;
    return block;
}
Block Aggregator::mergeAndConvertOneBucketToBlock(