Quick Text's implicitWidth doesn't respect maximumLineCount

import QtQuick

Window {
    width: 300
    height: 200
    visible: true

    Rectangle {
        anchors.fill: txt
        color: 'red'
    }

    Text {
        id: txt
        anchors.centerIn: parent
        text: "1st line\n2nd long long long long long long line"
        maximumLineCount: 1
    }
}