The Reader Bug?

I try read Denver Crime Data example file crime.csv,the first line get wrong col number.The header has 19 cols,but read 18 cols.
Debug the source,in file reader.hpp line Code:
quote_opened = escaped || (buffer_[i + 1] != delimiter::value);
seem wrong,May be is like this:
quote_opened = escaped && (buffer_[i + 1] != delimiter::value);
Or my wrong usage?

set the first row not the header