Freeze or crash in QJSEngine::evaluate()

Build and run a simple QCoreApplication:

#include <QCoreApplication>
#include <QJSEngine>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    QJSEngine().evaluate(QByteArray("Array(1E9)|1"));
    return 0;
}

It will take more than a minute or crash going oom.

It seems as if this could be handled better because:

• the JavaScript seems to only return what's behind the "|"

• Array(1E9)
  

  will not freeze at all

• Array(1E10)|1
  

  does not freeze either.