"Fatal error: Index out of range" when both ',' and '\n' are within a quoted cell

CSVImporter_Bug.swift

import XCPlayground
import CSVImporter

class Row {
    let cell1: String
    let cell2: String
    let cell3: String
    init(cell1: String, cell2: String, cell3: String){
        self.cell1 = cell1
        self.cell2 = cell2
        self.cell3 = cell3
    }
}

let csvFileWithComma = "Column 1,Column 2,Column 3\n"
    + "cell 1.1,cell 1.2,cell 1.3\n"
    + "cell 2.1,\"cell 2.2, with comma\",cell 2.3"

let csvFileWithNewline = "Column 1,Column 2,Column 3\n"
    + "cell 1.1,cell 1.2,cell 1.3\n"
    + "cell 2.1,\"cell 2.2\n with newline\",cell 2.3"

let csvFileWithCommaAndNewline = "Column 1,Column 2,Column 3\n"
    + "cell 1.1,cell 1.2,cell 1.3\n"
    + "cell 2.1,\"cell 2.2, with comma and \n newline\",cell 2.3"


let importerWithComma = CSVImporter<Row>(contentString: csvFileWithComma)
importerWithComma.importRecords(structure: {print($0)}, recordMapper: {
    return Row(cell1: $0["Column 1"]!, cell2: $0["Column 2"]!, cell3: $0["Column 3"]!)
})

let importerWithNewline = CSVImporter<Row>(contentString: csvFileWithNewline)
importerWithNewline.importRecords(structure: {print($0)}, recordMapper: {
    return Row(cell1: $0["Column 1"]!, cell2: $0["Column 2"]!, cell3: $0["Column 3"]!)
})

let importerWithCommaAndNewline = CSVImporter<Row>(contentString: csvFileWithCommaAndNewline)
importerWithCommaAndNewline.importRecords(structure: {print($0)}, recordMapper: {
    return Row(cell1: $0["Column 1"]!, cell2: $0["Column 2"]!, cell3: $0["Column 3"]!)
})