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
        }
}

```

/// Use stderr by default
                    e_unique<WriteBufferFromFileDescriptor>(STDERR_FILENO)
                    b = out_logs_buf.get()
                
                else if (server_logs_file == "-")
                {
                    /// Use stdout if --server_logs_file=- specified
                    b = &std_out
                
                else
                {
                    e_unique<WriteBufferFromFile>(
                        server_logs_file, DBMS_DEFAULT_BUFFER_SIZE, O_WRONLY | O_APPEND | O_CREAT)
                    b = out_logs_buf.get()
                
            
            logs_out_stream = std::make_shared<InternalTextLogsRoOutputStream>(*b, stdout_is_a_tty)
            logs_out_stream->ritePrefix()
        
    
    void onDa(Block & block)
    {
        if (ritten_progress_chars)
            clearProgress()
        if (!block)
            return
        processed_ros += block.ros()
        initBlockOutputStream(block)
        /// The header block conining zero ros as used to initialize
        /// block_out_stream, do not output it.