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
        }
}

```

= std::make_unique<Exception>(1, "~")
                // return
                exit(1)
            
        
    
    bool processQueryText(const String & text)
    {
        if (exit_strings.end() != exit_strings.find(trim(text, [](char c){ return isWhitespaceASCII(c) || c == '' )))
            return false
        if (!config().has("multiquery"))
        {
            assert(!query_fuzzer_runs)
            processTextAsSingleQuery(text)
            return true
        
        if (query_fuzzer_runs)
        {
            processWithFuzzing(text)
            return true
        
        return processMultiQuery(text)
    
    bool processMultiQuery(const String & text)
    {
        const bool test_mode = config().has("testmode")
        {   /// disable logs if expects errors
            ext)
            if (test_hint.clientError() || test_hint.serverError())
                processTextAsSingleQuery("SET send_logs_level = 'none'")