QJSEngine leaks memory

/*
 * Demonstrate a memory leak in QJSEngine.
 *
 * Build with:
 *    qmake -project -o TestQJSEngine.pro
 *    echo 'QT += qml' >> TestQJSEngine.pro
 *    qmake TestQJSEngine.pro
 *    make
 */

#include <QCoreApplication>
#include <QJSEngine>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
    QJSEngine interpreter;
    QJSValue result;
    for (int i = 0; i < 1e7; i++)
        result = interpreter.evaluate("2+2");
    qDebug() << "Result is: " << result.toNumber();
}