Replacing signal handlers in a PropertyChanges can lead to double deallocation

In some cases it seems Qt gets confused about the parenting of the signal handler expression. I have attached a simple test case (main.qml) that causes a crash when you close it.

To reproduce: Click the window twice or more (to change state at least twice), then close the window.

In the attached example (one of) the expression gets deallocated first here:
0 QObject::~QObject qobject.cpp 818 0x7ffff62fb8af
1 QDeclarativeExpression::~QDeclarativeExpression qdeclarativeexpression.cpp 336 0x7ffff793f81a
2 QDeclarativeExpression::~QDeclarativeExpression qdeclarativeexpression.cpp 338 0x7ffff793f84c
3 QDeclarativeReplaceSignalHandler::~QDeclarativeReplaceSignalHandler qdeclarativepropertychanges.cpp 145 0x7ffff7837525
4 QDeclarativeReplaceSignalHandler::~QDeclarativeReplaceSignalHandler qdeclarativepropertychanges.cpp 146 0x7ffff78375ce
5 QDeclarativePropertyChanges::~QDeclarativePropertyChanges qdeclarativepropertychanges.cpp 382 0x7ffff7834dc2
6 QDeclarativePrivate::QDeclarativeElement<QDeclarativePropertyChanges>::~QDeclarativeElement qdeclarativeprivate.h 87 0x7ffff7800075
7 QDeclarativePrivate::QDeclarativeElement<QDeclarativePropertyChanges>::~QDeclarativeElement qdeclarativeprivate.h 87 0x7ffff78000ca
8 QObjectPrivate::deleteChildren qobject.cpp 1907 0x7ffff62fd61a
9 QObject::~QObject qobject.cpp 926 0x7ffff62fbd4b
10 QDeclarativeState::~QDeclarativeState qdeclarativestate.cpp 171 0x7ffff7820afe
11 QDeclarativePrivate::QDeclarativeElement<QDeclarativeState>::~QDeclarativeElement qdeclarativeprivate.h 87 0x7ffff780039f
12 QDeclarativePrivate::QDeclarativeElement<QDeclarativeState>::~QDeclarativeElement qdeclarativeprivate.h 87 0x7ffff78003f4
13 QObjectPrivate::deleteChildren qobject.cpp 1907 0x7ffff62fd61a
14 QObject::~QObject qobject.cpp 926 0x7ffff62fbd4b
15 QGraphicsObject::~QGraphicsObject qgraphicsitem.h 547 0x7ffff78c48cb
16 QDeclarativeItem::~QDeclarativeItem qdeclarativeitem.cpp 1660 0x7ffff78be068
17 QDeclarativeRectangle::~QDeclarativeRectangle qdeclarativerectangle_p.h 136 0x7ffff788b1f0
18 QDeclarativePrivate::QDeclarativeElement<QDeclarativeRectangle>::~QDeclarativeElement qdeclarativeprivate.h 87 0x7ffff7890d11
19 QDeclarativePrivate::QDeclarativeElement<QDeclarativeRectangle>::~QDeclarativeElement qdeclarativeprivate.h 87 0x7ffff7890d72
20 QGraphicsScene::clear qgraphicsscene.cpp 2442 0x7ffff7108aa0
... <More>

And then later here (as m_expression):
0 ??
1 QDeclarativeBoundSignal::~QDeclarativeBoundSignal qdeclarativeboundsignal.cpp 133 0x7ffff7985db9
2 QDeclarativeBoundSignal::~QDeclarativeBoundSignal qdeclarativeboundsignal.cpp 135 0x7ffff7985e4a
3 QObjectPrivate::deleteChildren qobject.cpp 1907 0x7ffff62fd61a
4 QObject::~QObject qobject.cpp 926 0x7ffff62fbd4b
5 QGraphicsObject::~QGraphicsObject qgraphicsitem.h 547 0x7ffff78c48cb
6 QDeclarativeItem::~QDeclarativeItem qdeclarativeitem.cpp 1660 0x7ffff78be068
7 QDeclarativeRectangle::~QDeclarativeRectangle qdeclarativerectangle_p.h 136 0x7ffff788b1f0
8 QDeclarativePrivate::QDeclarativeElement<QDeclarativeRectangle>::~QDeclarativeElement qdeclarativeprivate.h 87 0x7ffff7890d11
9 QDeclarativePrivate::QDeclarativeElement<QDeclarativeRectangle>::~QDeclarativeElement qdeclarativeprivate.h 87 0x7ffff7890d72
10 QGraphicsScene::clear qgraphicsscene.cpp 2442 0x7ffff7108aa0
11 QGraphicsScene::~QGraphicsScene qgraphicsscene.cpp 1649 0x7ffff7106b21
12 QDeclarativeScene::~QDeclarativeScene qdeclarativeview.cpp 77 0x7ffff7805bc6
13 QDeclarativeScene::~QDeclarativeScene qdeclarativeview.cpp 77 0x7ffff7805bf8
14 QObjectPrivate::deleteChildren qobject.cpp 1907 0x7ffff62fd61a
15 QWidget::~QWidget qwidget.cpp 1681 0x7ffff693b0c1
16 QFrame::~QFrame qframe.cpp 240 0x7ffff6e90438
17 QAbstractScrollArea::~QAbstractScrollArea qabstractscrollarea.cpp 521 0x7ffff6f3adc2
18 QGraphicsView::~QGraphicsView qgraphicsview.cpp 1158 0x7ffff7136db2
19 QDeclarativeView::~QDeclarativeView qdeclarativeview.cpp 310 0x7ffff7801f2d
20 QmlApplicationViewer::~QmlApplicationViewer qmlapplicationviewer.cpp 98 0x4034cb
... <More>