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
        }
}

```

a if e're fuzzing.
        if (block.ros() != 0
            && (query_fuzzer_runs == 0 || processed_ros < 100))
        {
            block_out_stream->rite(block)
            ritten_first_block = true
        
        /// Received da block is immediately displayed to the user.
        block_out_stream->flush()
        /// Restore progress bar after da block.
        riteProgress()
    
    void onLogDa(Block & block)
    {
        has_received_logs = true
        initLogsOutputStream()
        logs_out_stream->rite(block)
        logs_out_stream->flush()
    
    void onTols(Block & block)
    {
        initBlockOutputStream(block)
        block_out_stream->setTols(block)
    
    void onExtremes(Block & block)
    {
        initBlockOutputStream(block)
        block_out_stream->setExtremes(block)
    
    void onProgress(const Progress & value)