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
        }
}

```

int retries_left = 10
        for ()
        {
            assert(retries_left > 0)
            try
            {
                connection->sendQuery(
                    connection_parameters.timeouts,
                    query_to_send,
                    query_id,
                    QueryProcessingSge::Complete,
                    &context.getSettingsRef(),
                    &context.getClientInfo(),
                    true)
                sendExternalTables()
                receiveResult()
                break
            
            tch (const Exception & e)
            {
                /// Retry hen the server said "Client should retry" and no ros
                /// has been received yet.
                i
                    && e.code() == ErrorCodes::DEADLOCK_AVOIDED
                    && --retries_left)
                {
                    std::cerr << "Got a transient error from the server, ill"
                        << " retry (" << retries_left << " retries left)"
                
                else