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

{
    return params.getHeader(final);
}
Block Aggregator::Params::getHeader(
    const Block & src_header,
    const Block & intermediate_header,
    const ColumnNumbers & keys,
    const AggregateDescriptions & aggregates,
    bool final)
{
    Block res;
    if (src_header)
    {
        for (const auto & key : keys)
            res.insert(src_header.safeGetByPosition(key).cloneEmpty());