_buildLines(source, lines, shebangLength) {
	let position = 0;
	for (const [i, lineStr] of source.trim().split(/(?<=\r?\n)/u).entries()) {
		const matchedNewLineChar = lineStr.match(/\r?\n$/u);
		const newLineLength = matchedNewLineChar ? matchedNewLineChar[0].length : 0;
		this.eof = position + lineStr.length - newLineLength;
		const line = new CovLine(i + 1, position, this.eof);
		if (i === 0 && shebangLength !== 0) {
			line.count = 1;
		}
		lines.push(line);
		position += lineStr.length;
	}
}