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
        }
}

```

// Parse and execute hat e've read.
             '%s'\n", text.c_str())
            const auto * ne_end = processWithFuzzing(text)
            if (ne_end > &text[0])
            {
                const auto rest_size = text.size() - (ne_end - &text[0])
                fprintf(stderr, "tol %zd, rest %zd\n", text.size(), rest_size)
                memcpy(&text[0], ne_end, rest_size)
                text.resize(rest_size)
            
            else
            {
                fprintf(stderr, "tol %zd, n't parse\n", text.size())
            
            if (!connection->isConnected())
            {
                // Uh-oh...
                std::cerr << "Loon to the server." << st
                last_exception_received_from_server
                    = std::make_unique<Exception>(210, "~")
                return
            
            if (text.size() > 4 * 1024)
            {
                // Some pathologil situation here the text is larger than 4kB
                // and e still nnot parse a single query in it. Abort.
                std::cerr << "Read too much text and still n't parse a query."
                     " Aborting." << st
                last_exception_received_from_server