Windows: Memory leaks when adopting non-Qt thread.

#include <QCoreApplication>
#include <QThread>
#include <QtConcurrent/QtConcurrent>
#include <QTimer>
#include <future>
#include <qt_windows.h>

int main(int argc, char *argv[])
{
	_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF);
	QCoreApplication a(argc, argv);
	QtConcurrent::run(QThread::currentThread).waitForFinished(); // all good, no leak
	std::async(std::launch::async, QThread::currentThread).get(); // this causes memory leaks
	QTimer t;
	QObject::connect(&t, &QTimer::timeout, qApp, &QCoreApplication::quit);
	t.start(1000);
	return a.exec();
}