**Describe the bug**
When you set the setting `input_format_with_names_use_header` to `0`, `INSERT` does not actually insert rows.

**How to reproduce**
* Which ClickHouse server version to use: git master `a21fe0b492cbc8628126a3cd493b83e82abf9978`, checked out on 2021-03-31
* Which interface to use: the native command-line client
* Non-default settings, if any: `input_format_with_names_use_header` = `0`
* `CREATE TABLE` statements for all tables involved:
```sql
CREATE TABLE csvtest
(
    `t` String
)
ENGINE = MergeTree
ORDER BY t
```
* Sample data for all these tables
`test.csv`:
```csv
t
testdata1
testdata2
```
* Queries to run that lead to unexpected result:
```
% clickhouse-client --input_format_with_names_use_header 0 --query "INSERT INTO csvtest FORMAT CSVWithNames" < test.csv
```

**Expected behavior**
Two rows `('testdata1'), ('testdata2')` will be inserted to the table `csvtest`.

**Error message and/or stacktrace**
Nothing. It silently discards the input and inserts nothing to the table.

**Additional context**
It works as expected if you set `input_format_with_names_use_header` to `1`.

}
            skipEndOfLine(in);
        }
        else
        {
            try
            {
                assertChar(delimiter, in);
            }
            catch (const DB::Exception &)
            {
                if (*in.position() == '\n' || *in.position() == '\r')
                {
                    out << "ERROR: Line feed found where delimiter (" << delimiter << ") is expected."
                           " It's like your file has less columns than expected.\n"
                           "And if your file have right number of columns, maybe it have unescaped quotes in values.\n";
                }
                else
                {
                    out << "ERROR: There is no delimiter (" << delimiter << "). ";
                    verbosePrintString(in.position(), in.position() + 1, out);
                    out << " found instead.\n";
                }
                return false;
            }
        }
    }
    return true;
}
void CSVRowInputFormat::syncAfterError()