GCC 13 has been complaining that QBitArray could be accessing past the
end of an array (specifically, the 1-element array QByteArray::_empty).
That's caused by the 'QByteArray::data() const' being:
#if QT5_NULL_STRINGS == 1
return d.data() ? d.data() : &_empty;
#else
return d.data();
#endif
A way to avoid this is to use operator[], which doesn't attempt to hide
null pointers (it has an assertion).
This is accomplished by writing nicer, more readable code, which is a
nice benefit.
Fixes: QTBUG-118631
Pick-to: 6.6
Change-Id: I85b3fc2dd45c4693be13fffd179579615a6ac98d
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
8739963c81