Does QRegExp::lastIndexIn work correct?

[Nebelig]

#include <QCoreApplication>
 
#include <QRegExp>
#include <QDebug>
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
 
 
    QRegExp reg("(.*)");
 
    QString str = "_1234_4567_";
 
    int pos1 = reg.indexIn(str, 5);
    qDebug() << "F" << pos1 << reg.cap();
 
    int pos2 = reg.lastIndexIn(str, 5);
    qDebug() << "B" << pos2 << reg.cap();
 
    return a.exec();
}

#include <QCoreApplication>

#include <QRegExp>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);


    QRegExp reg("(.*)");

    QString str = "_1234_4567_";

    int pos1 = reg.indexIn(str, 5);
    qDebug() << "F" << pos1 << reg.cap();

    int pos2 = reg.lastIndexIn(str, 5);
    qDebug() << "B" << pos2 << reg.cap();

    return a.exec();
}

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Generates the following output:

F 5 "_4567_"
B 5 "_4567_"

F 5 "_4567_"
B 5 "_4567_"

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But I think output of reg.lastIndexIn(str, 5) must be like this:

B 0 "_1234_"

B 0 "_1234_"

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Hm....