Value returned by QElapsedTimer::msecsTo is negative of what it should be according to documentation

#include <QElapsedTimer>
#include <QThread>
#include <QDebug>

class Thread: public QThread
{
public:
    using QThread::sleep;
};

int main(int argc, char *argv[])
{
    QElapsedTimer timer1;
    timer1.start();

    Thread::sleep(1);

    QElapsedTimer timer2;
    timer2.start();

    qDebug() << timer2.msecsTo(timer1);
    qDebug() << timer1.msecsTo(timer2);

    return 0;
}

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