[REG 5.14->5.15] QShortcut constructor call fails to compile if called with ambiguousMember=nullptr (or 0)

#include <QShortcut>
#include <QKeySequence>
int main(int argc, char **argv) {
        QShortcut x(QKeySequence(QObject::tr("Ctrl+L", "File|Load")), nullptr, SLOT(someSlotHere()), nullptr);
}

In file included from test.cpp:1:
In file included from /usr/include/qt5/QtWidgets/QShortcut:1:
/usr/include/qt5/QtWidgets/qshortcut.h:101:9: error: no matching member function for call to 'connect'
        connect(this, &QShortcut::activated, object1, std::move(slot1));
        ^~~~~~~
test.cpp:4:12: note: in instantiation of function template specialization 'QShortcut::QShortcut<char, nullptr_t>' requested here
        QShortcut x(QKeySequence(QObject::tr("Ctrl+L", "File|Load")), nullptr, SLOT(someSlotHere()), nullptr);
                  ^
/usr/include/qt5/QtCore/qobject.h:283:13: note: candidate function template not viable: no known conversion from 'const char *' to 'const QObject *' for 3rd argument
            connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, const QObject *context, Func2 slot,
            ^
/usr/include/qt5/QtCore/qobject.h:322:13: note: candidate function template not viable: no known conversion from 'const char *' to 'const QObject *' for 3rd argument
            connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, const QObject *context, Func2 slot,
            ^
/usr/include/qt5/QtCore/qobject.h:222:36: note: candidate function not viable: no known conversion from 'void (QShortcut::*)()' to 'const char *' for 2nd argument
    static QMetaObject::Connection connect(const QObject *sender, const char *signal,
                                   ^
/usr/include/qt5/QtCore/qobject.h:481:41: note: candidate function not viable: no known conversion from 'void (QShortcut::*)()' to 'const char *' for 2nd argument
inline QMetaObject::Connection QObject::connect(const QObject *asender, const char *asignal,
                                        ^
/usr/include/qt5/QtCore/qobject.h:225:36: note: candidate function not viable: no known conversion from 'void (QShortcut::*)()' to 'const QMetaMethod' for 2nd argument
    static QMetaObject::Connection connect(const QObject *sender, const QMetaMethod &signal,
                                   ^
/usr/include/qt5/QtCore/qobject.h:242:43: note: candidate template ignored: substitution failure [with Func1 = void (QShortcut::*)(), Func2 = nullptr_t]: no type named 'Object' in 'QtPrivate::FunctionPointer<nullptr_t>'
    static inline QMetaObject::Connection connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal,
                                          ^
/usr/include/qt5/QtCore/qobject.h:274:13: note: candidate function template not viable: requires 3 arguments, but 4 were provided
            connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, Func2 slot)
            ^
/usr/include/qt5/QtCore/qobject.h:314:13: note: candidate function template not viable: requires 3 arguments, but 4 were provided
            connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal, Func2 slot)
            ^
1 error generated.