Crash delivering key event to just-unloaded MouseArea

import QtQuick 2.1
import QtQuick.Controls 1.0

Item {
  id: root
  width: 100
  height: 100

  property alias __active: loader.active

  Loader {
    id: loader
    active: true
    sourceComponent: Button {
      text: 'Hit space to crash'
      onClicked: root.__active = false
      focus: true
    }

    focus: true
  }
}

>	Qt5Quickd.dll!QScopedPointer<QObjectData,QScopedPointerDeleter<QObjectData> >::data()  Line 132 + 0x3 bytes	C++
 	Qt5Quickd.dll!qGetPtrHelper<QScopedPointer<QObjectData,QScopedPointerDeleter<QObjectData> > >(const QScopedPointer<QObjectData,QScopedPointerDeleter<QObjectData> > & p)  Line 886 + 0xb bytes	C++
 	Qt5Quickd.dll!QQuickWindow::d_func()  Line 70 + 0x13 bytes	C++
 	Qt5Quickd.dll!QQuickWindow::contentItem()  Line 1098 + 0x8 bytes	C++
 	Qt5Quickd.dll!QQuickItemPrivate::deliverKeyEvent(QKeyEvent * e)  Line 4404 + 0xf bytes	C++
 	Qt5Quickd.dll!QQuickWindow::sendEvent(QQuickItem * item, QEvent * e)  Line 2150	C++
 	Qt5Quickd.dll!QQuickWindow::keyReleaseEvent(QKeyEvent * e)  Line 1236	C++
 	Qt5Quickd.dll!QQuickView::keyReleaseEvent(QKeyEvent * e)  Line 590	C++
 	Qt5Guid.dll!QWindow::event(QEvent * ev)  Line 1874	C++
 	Qt5Quickd.dll!QQuickWindow::event(QEvent * e)  Line 1212	C++
 	Qt5Widgetsd.dll!QApplicationPrivate::notify_helper(QObject * receiver, QEvent * e)  Line 3471 + 0x11 bytes	C++
 	Qt5Widgetsd.dll!QApplication::notify(QObject * receiver, QEvent * e)  Line 2892 + 0x10 bytes	C++
 	Qt5Cored.dll!QCoreApplication::notifyInternal(QObject * receiver, QEvent * event)  Line 867 + 0x15 bytes	C++
 	Qt5Cored.dll!QCoreApplication::sendSpontaneousEvent(QObject * receiver, QEvent * event)  Line 235 + 0x38 bytes	C++
 	Qt5Guid.dll!QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent * e)  Line 1581 + 0xe bytes	C++
 	Qt5Guid.dll!QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent * e)  Line 1292 + 0x9 bytes	C++
 	Qt5Guid.dll!QWindowSystemInterface::sendWindowSystemEventsImplementation(QFlags<enum QEventLoop::ProcessEventsFlag> flags)  Line 581 + 0x9 bytes	C++
 	Qt5Guid.dll!QWindowSystemInterface::sendWindowSystemEvents(QFlags<enum QEventLoop::ProcessEventsFlag> flags)  Line 561 + 0x9 bytes	C++
 	qwindowsd.dll!QWindowsGuiEventDispatcher::sendPostedEvents()  Line 86 + 0xd bytes	C++