QFileSystemWatcher does not monitor directory if a directory is removed before it has been added

QFileSystemWatcher does not monitor a directory if a directory is removed with QFileSystemWatcher::removePath(Qstring &path) before it has been added to QFileSystemWatcher with QFileSystemWatcher::addPath ( const QString & path ).

It would be expected that a remove of a directory that was not previously added to QFileSystemWatcher did not have any effect. And that monitoring would work as normal when the path was added.

Reproducible with the following example:
#include <QtGui>
#include <QDebug>

class CustomWidget : public QObject
{ Q_OBJECT
public:
CustomWidget(QWidget* parent=0) : QObject(parent)
{ }

public slots:
void aSlot()

};

#include "main.moc"

int main(int argc, char *argv[])
{
QApplication app(argc, argv);
CustomWidget wid;
QFileSystemWatcher watcher;
watcher.removePath("/test"); //works as expected if commented out
watcher.addPath("/test");
QObject::connect(&watcher, SIGNAL(directoryChanged(QString)) , &wid, SLOT(aSlot() ) );
return app.exec();
}