When QMetaObject::invokeMethod run functor finished, Lambda not been released, memory leak.

// Qt lin import
#include <QtCore>
#include <QtConcurrent>

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

    QtConcurrent::run( [ ]()
    {
        // Case 1: Memory leak, no "release" log
        forever
        {
            qDebug( "new" );
            QSharedPointer< int > test( new int, [ ](int *p){ qDebug( "release" ); delete p; } );

            QMetaObject::invokeMethod( qApp, [ test ]()
            {
                qDebug() << test.data();
            } );

            QThread::sleep( 1 );
        }

        // Case 2: Work fine, "release" log has been print;
        forever
        {
            qDebug( "new" );
            QSharedPointer< int > test( new int, [ ](int *p){ qDebug( "release" ); delete p; } );

            QtConcurrent::run( [ test ]()
            {
                qDebug() << test.data();
            } );

            QThread::sleep( 1 );
        }
    } );

    return a.exec();
}