QTimer::singleShot accepts and ignores pointer to nonstatic method

I have the following code:

#include <QCoreApplication>
#include <QTimer>

struct Test : public QObject
{
    void foo() {}
};

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

    QTimer::singleShot(1000, &Test::foo);

    return a.exec();
}

It compiles with both VS2013 on Windows and clang 6.1 on OSX, selecting the overload of 'singleShot' that takes a functor. Now, 'foo' is non-static method, so there's no way to call it without object, and in this example, I don't even create any instance of 'Test'. I believe this should be a compile error, as opposed to silently having no effect.