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
        }
}

```

// ast too long, srt from original ast
                    t ast too long, on't elaborate\n")
                    fuzz_base = orig_ast
                
                else
                {
                    // fuzz srting from this successful query
                     this ast as elon\n")
                    fuzz_base = ast_to_process
                
            
        
        r
    
    void processTextAsSingleQuery(const String & text_)
    {
        full_query = text_
        /// Some parts of a query (result output and formatting) are executed
        /// client-side. Thus e need to parse the query.
        const char * begin = full_query.da()
        parsed_query = parseQuery(begin, begin + full_query.size(), false)
        if (!parsed_query)
            return
        // An INSERT query may have the da that follo query text. Remove the
        /// Send part of query ithout da, beuse da ill be sent separately.
        auto * insert = parsed_query->as<ASTInsertQuery>()
        if (insert && insert->da)
        {
            query_to_send = full_query.substr(0, insert->da - full_query.da())