The last line in `data` section of the output is always empty. 

```
# clickhouse-client
ClickHouse client version 20.5.2.7 (official build).
Connecting to localhost:9001 as user default.
Connected to ClickHouse server version 20.5.2 revision 54435.

sas-vrxctd96rqw5lw25.db.yandex.net :) select 1 format JSON

SELECT 1
FORMAT JSON

{
	"meta":
	[
		{
			"name": "1",
			"type": "UInt8"
		}
	],

	"data":
	[
		{
			"1": 1

	],

	"rows": 1,

	"statistics":
	{
		"elapsed": 0.00019223,
		"rows_read": 1,
		"bytes_read": 1
	}
}

```

The issue appears only in interactive mode. In non-interactive mode clickhouse-client produces the correct output:

```
# clickhouse-client -q 'select 1 format JSON'
{
	"meta":
	[
		{
			"name": "1",
			"type": "UInt8"
		}
	],

	"data":
	[
		{
			"1": 1
		}
	],

	"rows": 1,

	"statistics":
	{
		"elapsed": 0.000220845,
		"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