Found in stress test: https://gist.github.com/alesapin/5cd6b8901488a1f170d5ef389900a534
Report: https://s3.amazonaws.com/clickhouse-test-reports/31158/7fb9a42b119b6c3eba1784caaabde51c1ded3384/stress_tests__debug__actions_.html
{
    
    auto & output = outputs.front();
    if (output.isFinished())
    {
        for (auto & input : inputs)
            input.close();
        chunks.clear();
        last_bucket_number.clear();
        return Status::Finished;