QObject::metaObject() returns invalid QMetaObject*

#ifndef TEST_H
#define TEST_H

#include <QObject>

class Test : public QObject
{
	Q_OBJECT
public:
	explicit Test(QObject *parent = 0);

signals:

public slots:
	void testSlot();

};

extern Test issue;

#endif // TEST_H

#include "test.h"

#include <QMetaMethod>

Test issue;

Test::Test(QObject *parent) :
    QObject(parent)
{
	const QMetaObject* object = metaObject();
	QByteArray normalizedSignature = QMetaObject::normalizedSignature( "testSlot()" );
	int         methodIndex = object->indexOfMethod( normalizedSignature );
	QMetaMethod method      = object->method( methodIndex );
}

void Test::testSlot()
{
}

#include "test.h"

int main(int argc, char *argv[])
{
	return 0;
}