```
$ ~/arc/build/clickhouse/programs/clickhouse client
ClickHouse client version 21.2.1.1-arcadia.
Connecting to localhost:9000 as user default.
Connected to ClickHouse server version 21.2.1 revision 54447.

max42-dev.sas.yp-c.yandex.net :) create table t(a Tuple(UInt8, UInt8)) engine = Log()

CREATE TABLE t
(
    `a` Tuple(UInt8, UInt8)
)
ENGINE = Log

Query id: b49dbb5d-d2a9-4c99-b90e-00c60edf2103

Ok.

0 rows in set. Elapsed: 0.005 sec. 

max42-dev.sas.yp-c.yandex.net :) insert into t values ((NULL, 42))

INSERT INTO t VALUES

Query id: 318d6f3e-f3bc-467c-85ff-62da908230dd

Logical error: 'Unexpected literal type inside Array: Nothing. It's a bug'.
Aborted (core dumped)
```

This is CH similar to one from Arcadia r7788360 (~fresh master version from GH).

(you don't have to strictly follow this form)

++buf.position();
        }
        else if (*buf.position() == '\'')
        {
            quoted ^= true;
            ++buf.position();
        }
        else if (*buf.position() == ')')
        {
            ++buf.position();
            if (!quoted)
                --balance;
        }
        else if (*buf.position() == '(')
        {
            ++buf.position();
            if (!quoted)
                ++balance;
        }
    }
    if (!buf.eof() && *buf.position() == ',')
        ++buf.position();
    return true;
}
void ValuesBlockInputFormat::assertDelimiterAfterValue(size_t column_idx)
{
    if (unlikely(!checkDelimiterAfterValue(column_idx)))
        throwAtAssertionFailed((column_idx + 1 == num_columns) ? ")" : ",", buf);
}
bool ValuesBlockInputFormat::checkDelimiterAfterValue(size_t column_idx)