Compilation error with gcc 4.8: no matching function for call to QQuickControlPrivate::connect

qquickcontrol.cpp: In member function \u2018void QQuickControlPrivate::setContentItem_helper(QQuickItem*, bool)\u2019:
qquickcontrol.cpp:416:115: error: no matching function for call to \u2018QQuickControlPrivate::connect(QQuickDeferredPointer<QQuickItem>&, void (QQuickItem::*)(qreal), QQuickControlPrivate* const, void (QQuickControlPrivate::*)())\u2019
         connect(contentItem, &QQuickItem::baselineOffsetChanged, this, &QQuickControlPrivate::updateBaselineOffset);
                                                                                                                   ^
qquickcontrol.cpp:416:115: note: candidates are:
In file included from /home/qt-everywhere-src-5.12.0/qtbase/include/QtCore/5.12.0/QtCore/private/qobject_p.h:1:0,
                 from /home/qt-everywhere-src-5.12.0/qtdeclarative/include/QtQml/5.12.0/QtQml/private/../../../../../src/qml/qml/qqmldata_p.h:55,
                 from /home/qt-everywhere-src-5.12.0/qtdeclarative/include/QtQml/5.12.0/QtQml/private/../../../../../src/qml/qml/qqmlnotifier_p.h:54,
                 from /home/qt-everywhere-src-5.12.0/qtdeclarative/include/QtQml/5.12.0/QtQml/private/../../../../../src/qml/qml/qqmlpropertycache_p.h:57,
                 from /home/qt-everywhere-src-5.12.0/qtdeclarative/include/QtQml/5.12.0/QtQml/private/qqmlpropertycache_p.h:1,
                 from /home/qt-everywhere-src-5.12.0/qtdeclarative/include/QtQml/5.12.0/QtQml/private/../../../../../src/qml/qml/qqmlglobal_p.h:56,
                 from /home/qt-everywhere-src-5.12.0/qtdeclarative/include/QtQml/5.12.0/QtQml/private/qqmlglobal_p.h:1,
                 from ../../include/QtQuickTemplates2/5.12.0/QtQuickTemplates2/private/../../../../../src/quicktemplates2/qtquicktemplates2global_p.h:52,
                 from ../../include/QtQuickTemplates2/5.12.0/QtQuickTemplates2/private/qtquicktemplates2global_p.h:1,
                 from qquickcontrol_p.h:54,
                 from qquickcontrol.cpp:37:
/home/qt-everywhere-src-5.12.0/qtbase/include/QtCore/5.12.0/QtCore/private/../../../../../src/corelib/kernel/qobject_p.h:213:43: note: template<class Func1, class Func2> static QMetaObject::Connection QObjectPrivate::connect(const typename QtPrivate::FunctionPointer<Func>::Object*, Func1, const typename QtPrivate::FunctionPointer<Func2>::Object*, Func2, Qt::ConnectionType)
     static inline QMetaObject::Connection connect(const typename QtPrivate::FunctionPointer<Func1>::Object *sender, Func1 signal,
                                           ^
/home/qt-everywhere-src-5.12.0/qtbase/include/QtCore/5.12.0/QtCore/private/../../../../../src/corelib/kernel/qobject_p.h:213:43: note:   template argument deduction/substitution failed:
qquickcontrol.cpp:416:115: note:   mismatched types \u2018const typename QtPrivate::FunctionPointer<Func>::Object*\u2019 and \u2018QQuickDeferredPointer<QQuickItem>\u2019
         connect(contentItem, &QQuickItem::baselineOffsetChanged, this, &QQuickControlPrivate::updateBaselineOffset);
                                                                                                                   ^
In file included from /home/qt-everywhere-src-5.12.0/qtbase/include/QtCore/5.12.0/QtCore/private/qobject_p.h:1:0,
                 from /home/qt-everywhere-src-5.12.0/qtdeclarative/include/QtQml/5.12.0/QtQml/private/../../../../../src/qml/qml/qqmldata_p.h:55,
                 from /home/qt-everywhere-src-5.12.0/qtdeclarative/include/QtQml/5.12.0/QtQml/private/../../../../../src/qml/qml/qqmlnotifier_p.h:54,
                 from /home/qt-everywhere-src-5.12.0/qtdeclarative/include/QtQml/5.12.0/QtQml/private/../../../../../src/qml/qml/qqmlpropertycache_p.h:57,
                 from /home/qt-everywhere-src-5.12.0/qtdeclarative/include/QtQml/5.12.0/QtQml/private/qqmlpropertycache_p.h:1,
                 from /home/qt-everywhere-src-5.12.0/qtdeclarative/include/QtQml/5.12.0/QtQml/private/../../../../../src/qml/qml/qqmlglobal_p.h:56,
                 from /home/qt-everywhere-src-5.12.0/qtdeclarative/include/QtQml/5.12.0/QtQml/private/qqmlglobal_p.h:1,
                 from ../../include/QtQuickTemplates2/5.12.0/QtQuickTemplates2/private/../../../../../src/quicktemplates2/qtquicktemplates2global_p.h:52,
                 from ../../include/QtQuickTemplates2/5.12.0/QtQuickTemplates2/private/qtquicktemplates2global_p.h:1,
                 from qquickcontrol_p.h:54,
                 from qquickcontrol.cpp:37:
/home/qt-everywhere-src-5.12.0/qtbase/include/QtCore/5.12.0/QtCore/private/../../../../../src/corelib/kernel/qobject_p.h:225:36: note: static QMetaObject::Connection QObjectPrivate::connect(const QObject*, int, QtPrivate::QSlotObjectBase*, Qt::ConnectionType)
     static QMetaObject::Connection connect(const QObject *sender, int signal_index, QtPrivate::QSlotObjectBase *slotObj, Qt::ConnectionType type);
                                    ^
/home/qt-everywhere-src-5.12.0/qtbase/include/QtCore/5.12.0/QtCore/private/../../../../../src/corelib/kernel/qobject_p.h:225:36: note:   no known conversion for argument 2 from \u2018void (QQuickItem::*)(qreal) {aka void (QQuickItem::*)(double)}\u2019 to \u2018int\u2019
make[3]: *** [.obj/qquickcontrol.o] Error 1
make[3]: Leaving directory `/home/qt-everywhere-src-5.12.0/qtquickcontrols2/src/quicktemplates2'
make[2]: *** [sub-quicktemplates2-make_first] Error 2
make[2]: Leaving directory `/home/qt-everywhere-src-5.12.0/qtquickcontrols2/src'
make[1]: *** [sub-src-make_first] Error 2
make[1]: Leaving directory `/home/qt-everywhere-src-5.12.0/qtquickcontrols2'
make: *** [module-qtquickcontrols2-make_first] Error 2