FreeType font backend fails to select font style when a single font file contains multiple font faces

#include <QGuiApplication>
#include <QFont>
#include <QFontInfo>
#include <QDebug>


int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

    QFont font("Avenir");
    font.setStyleName("Light");
    font.setPixelSize(12);

    QFontInfo info(font);
    qDebug() << info.family() << info.styleName();
}

qt.qpa.fonts: Populating font family aliases took 92 ms. Replace uses of missing font family "Avenir" with one that exists to avoid this cost. 
"Avenir" "Book"

"Avenir" "Light"