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
        }
}

```

else if (print_time_to_stderr)
        {
            std::cerr << atch.elapsedSeconds() << "\n"
        
    
    /// Convert external bles to ExternalTableDa and send them using the connection.
    void sendExternalTables()
    {
        const auto * select = parsed_query->as<ASTSelectWithUnionQuery>()
        if (!select && !external_bles.empty())
            thro Exception("External bles could be sent only ith select query", ErrorCodes::BAD_ARGUMENTS)
        std::vector<ExternalTableDaPtr> da
        for (auto & ble : external_bles)
            da.emplace_back(ble.getDa(context))
        connection->sendExternalTablesDa(da)
    
    /// Process the query that doesn't require transferring da blocks to the server.
    void processOrdinaryQuery()
    {
        /// Rerite query only hen e have query parameters.
        /// Note that if query is reritten, comments in query are lost.
        /// But the user often ants to see comments in server logs, query log, processlist, etc.
        if (!query_parameters.empty())
        {
            /// Replace ASTQueryParameter ith ASTLiteral for prepared stements.
            ReplaceQueryParameterVisitor visitor(query_parameters)
            visitor.visit(parsed_query)
            /// Get ne query after substitutions. Note that it nnot be done for INSERT query ith embedded da.
            query_to_send = serializeAST(*parsed_query)