Easy to reproduce:
### 20.3.13
```
SELECT 1
FORMAT JSON

{
        "meta":
        [
                {
                        "name": "1",
                        "type": "UInt8"
                }
        ],

        "data":
        [
                {
                        "1": 1
                }
        ],

        "rows": 1,

        "statistics":
        {
                "elapsed": 0.000203731,
                "rows_read": 1,
                "bytes_read": 1
        }
}
```

### 20.4.5
```
:) select 1 format JSON

SELECT 1
FORMAT JSON

{
        "meta":
        [
                {
                        "name": "1",
                        "type": "UInt8"
                }
        ],

        "data":
        [
                {
                        "1": 1
>>>>>>>> no closing bracket <<<<<<<<<<
        ],

        "rows": 1,

        "statistics":
        {
                "elapsed": 0.000771732,
                "rows_read": 1,
                "bytes_read": 1
        }
}
```
### master
```

SELECT 1
FORMAT JSON

{
        "meta":
        [
                {
                        "name": "1",
                        "type": "UInt8"
                }
        ],

        "data":
        [
                {
                        "1": 1
>>>>>>>> no closing bracket <<<<<<<<<<
        ],

        "rows": 1,

        "statistics":
        {
                "elapsed": 0.00103364,
                "rows_read": 1,
                "bytes_read": 1
        }
}

```

hile (packet_type && *packet_type == Protocol::Server::Log)
        {
            receiveAndProcessPacket(false)
            packet_type = connection->checkPacket()
        
    
    void initBlockOutputStream(const Block & block)
    {
        if (!block_out_stream)
        {
            WriteBuffer * out_buf = nullptr
            String pager = config().getString("pager", "")
            if (!pager.empty())
            {
                signal(SIGPIPE, SIG_IGN)
                pager_cmd = ShellCommand::execute(pager, true)
                out_buf = &pager_cmd->in
            
            else
            {
                out_buf = &std_out
            
            String current_format = format
            /// The query n specify output format or output file.
            /// FIXME: try to prettify this st using `as<>()`
            if (const auto * query_ith_output = dynamic_st<const ASTQueryWithOutput *>(parsed_query.get()))
            {
                if (query_ith_output->out_file)
                {
                    const auto & out_file_node = query_ith_output->out_file->as<ASTLiteral &>()