QAction::setIconVisibleInMenu does not work.

The Qt documentation states that setIconVisibleInMenu has priority over Qt::AA_DontShowIconsInMenus.
Good. But unfortunatly it does not work in this case:

if Qt::AA_DontShowIconsInMenus is set to TRUE
then setIconVisibleInMenu(true) has no effect

The bug is easy to identify in qaction.cpp in function:
void QAction::setIconVisibleInMenu(bool visible)

There is the line:

if (visible != (bool)d->iconVisibleInMenu)

But this if FALSE if d->iconVisibleInMenu is -1 and visible is true.
The line should rather be:

if ((int)visible != d->iconVisibleInMenu)

Another related issue in the same function is the line:

&& visible == !QApplication::instance()->testAttribute(Qt::AA_DontShowIconsInMenus))) {

should be changed for:

&& visible != !QApplication::instance()->testAttribute(Qt::AA_DontShowIconsInMenus))) {

making these changes seems to restore expected functionality.