Crash when using extended states with transitions.

import QtQuick 1.1


Item {
    id: window
    width: 480
    height: 640

    property bool portrait: true
    property bool closed: false

    Item {
        id: container
        anchors { left: parent.left; top: parent.top; right: parent.right }
        height: 480

        Item {
            width: portrait ? 320 : 480
            height: portrait ? 480 : 320

            anchors.centerIn: parent

            Rectangle {
                id: menu
                color: "green"
                anchors { left: parent.left; top: parent.top }

            }

            Rectangle {
                id: content
                color: "black"
                anchors { right: parent.right; bottom: parent.bottom }

                Text {
                    anchors.centerIn: parent
                    text: closed ? "Close" : "Open"
                    font.pixelSize: 30
                    color: "white"
                }
            }

            MouseArea {
                anchors.fill: parent
                onClicked: window.closed = !window.closed
            }

        }
    }

    states: [
        State {
            name: "portrait"
            when: window.portrait && !window.closed
            AnchorChanges {
                target: menu
                anchors { bottom: parent.verticalCenter; right: parent.right }
            }
            AnchorChanges {
                target: content
                anchors { top: parent.top; left:parent.left }
            }
        }, State {
            name: "portrait-closed"
            extend: "portrait"
            when: window.portrait && window.closed
            AnchorChanges {
                target: content
                anchors.top: parent.verticalCenter
            }
        }, State {
            name: "landscape"
            when: !window.portrait && !window.closed
            AnchorChanges {
                target: menu
                anchors { bottom: parent.bottom; right: parent.horizontalCenter }
            }
            AnchorChanges {
                target: content
                anchors { top: parent.top; left:parent.left }
            }
        }, State {
            name: "landscape-closed"
            extend: "landscape"
            when: !window.portrait && window.closed
            AnchorChanges {
                target: content
                anchors.left: parent.horizontalCenter
            }
        }
    ]

    transitions: [
        Transition {
            from: "portrait"; to: "portrait-closed"; reversible: true
            AnchorAnimation { duration: 300 }
        }, Transition {
            from: "landscape"; to: "landscape-closed"; reversible: true
            AnchorAnimation { duration: 300 }
        }
    ]

    Item {
        anchors {
            left: parent.left; top: container.bottom
            right: parent.right; bottom: parent.bottom
        }

        Rectangle {
            anchors.fill: buttonText
            anchors.margins: -20
            color: "lightsteelblue"
            radius: 4
        }

        Text {
            id: buttonText
            anchors.centerIn: parent

            text: window.portrait ? "Portrait" : "Landscape"
            font.pixelSize: 30
        }

        MouseArea {
            anchors.fill: buttonText
            anchors.margins: -20

            onClicked: window.portrait = !window.portrait
        }
    }
}

0x00007ffff793b7b4 in QDeclarativeAbstractBinding::removeFromObject (this=0x785540) at /.../src/declarative/qml/qdeclarativebinding.cpp:156
156             *m_prevBinding = m_nextBinding;
(gdb) bt
#0  0x00007ffff793b7b4 in QDeclarativeAbstractBinding::removeFromObject (this=0x785540) at /.../src/declarative/qml/qdeclarativebinding.cpp:156
#1  0x00007ffff793b540 in QDeclarativeAbstractBinding::addToObject (this=0x785540, object=0x6fb280, index=1) at /.../src/declarative/qml/qdeclarativebinding.cpp:104
#2  0x00007ffff7941142 in QDeclarativePropertyPrivate::setBinding (object=0x6fb280, coreIndex=1, valueTypeIndex=-1, newBinding=0x785540, flags=...) at /.../src/declarative/qml/qdeclarativeproperty.cpp:795
#3  0x00007ffff79409ee in QDeclarativePropertyPrivate::setBinding (that=..., newBinding=0x785540, flags=...) at /.../src/declarative/qml/qdeclarativeproperty.cpp:671
#4  0x00007ffff7826655 in QDeclarativeAnchorChanges::execute (this=0x6f9470, reason=QDeclarativeActionEvent::FastForward) at /.../src/declarative/util/qdeclarativestateoperations.cpp:1160
#5  0x00007ffff7820044 in QDeclarativeTransitionManager::transition (this=0x702158, list=..., transition=0x0) at /.../src/declarative/util/qdeclarativetransitionmanager.cpp:156
#6  0x00007ffff781c09f in QDeclarativeState::apply (this=0x702d40, group=0x6e3bc0, trans=0x0, revert=0x6f22d0) at /.../src/declarative/util/qdeclarativestate.cpp:722
#7  0x00007ffff7835362 in QDeclarativeStateGroupPrivate::setCurrentStateInternal (this=0x6f7530, state=..., ignoreTrans=false) at /.../src/declarative/util/qdeclarativestategroup.cpp:476
#8  0x00007ffff7834226 in QDeclarativeStateGroup::setState (this=0x6e3bc0, state=...) at /.../src/declarative/util/qdeclarativestategroup.cpp:292
#9  0x00007ffff78346ab in QDeclarativeStateGroupPrivate::updateAutoState (this=0x6f7530) at /.../src/declarative/util/qdeclarativestategroup.cpp:346
#10 0x00007ffff78344b0 in QDeclarativeStateGroup::updateAutoState (this=0x6e3bc0) at /.../src/declarative/util/qdeclarativestategroup.cpp:327
#11 0x00007ffff7819cbe in QDeclarativeState::setWhen (this=0x6f6610, when=0x6faa00) at /.../src/declarative/util/qdeclarativestate.cpp:256
#12 0x00007ffff7a5ddd4 in QDeclarativeState::qt_metacall (this=0x6f6610, _c=QMetaObject::WriteProperty, _id=1, _a=0x7fffffff9f70) at .moc/debug-shared/moc_qdeclarativestate_p.cpp:181
#13 0x00007ffff5c56694 in QMetaObject::metacall (object=0x6f6610, cl=QMetaObject::WriteProperty, idx=2, argv=0x7fffffff9f70) at /.../src/corelib/kernel/qmetaobject.cpp:245
#14 0x00007ffff793c53c in QDeclarativeBinding::update (this=0x6faa00, flags=...) at /.../src/declarative/qml/qdeclarativebinding.cpp:359
#15 0x00007ffff793db3e in QDeclarativeBinding::update (this=0x6faa00) at ../../include/QtDeclarative/private/../../../../../../depot/qt/4.8/src/declarative/qml/qdeclarativebinding_p.h:208
#16 0x00007ffff793d4da in QDeclarativeBindingPrivate::emitValueChanged (this=0x6e7120) at /.../src/declarative/qml/qdeclarativebinding.cpp:469
#17 0x00007ffff793a309 in QDeclarativeExpressionPrivate::_q_notify (this=0x6e7120) at /.../src/declarative/qml/qdeclarativeexpression.cpp:800
#18 0x00007ffff793a636 in QDeclarativeExpression::qt_static_metacall (_o=0x6faa00, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fffffffa440) at .moc/debug-shared/moc_qdeclarativeexpression.cpp:54
#19 0x00007ffff793a72a in QDeclarativeExpression::qt_metacall (this=0x6faa00, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x7fffffffa440) at .moc/debug-shared/moc_qdeclarativeexpression.cpp:94
#20 0x00007ffff7a76246 in QDeclarativeBinding::qt_metacall (this=0x6faa00, _c=QMetaObject::InvokeMetaMethod, _id=5, _a=0x7fffffffa440) at .moc/debug-shared/moc_qdeclarativebinding_p.cpp:86
#21 0x00007ffff5c56694 in QMetaObject::metacall (object=0x6faa00, cl=QMetaObject::InvokeMetaMethod, idx=5, argv=0x7fffffffa440) at /.../src/corelib/kernel/qmetaobject.cpp:245
#22 0x00007ffff5c6c7b3 in QMetaObject::activate (sender=0x703220, m=0x755658, local_signal_index=0, argv=0x0) at /.../src/corelib/kernel/qobject.cpp:3558
---Type <return> to continue, or q <return> to quit---
#23 0x00007ffff5c6caf0 in QMetaObject::activate (sender=0x703220, signal_index=32, argv=0x0) at /.../src/corelib/kernel/qobject.cpp:3615
#24 0x00007ffff791fa22 in QDeclarativeVMEMetaObject::metaCall (this=0x755650, c=QMetaObject::WriteProperty, _id=41, a=0x7fffffffa810) at /.../src/declarative/qml/qdeclarativevmemetaobject.cpp:564
#25 0x00007ffff5c56670 in QMetaObject::metacall (object=0x703220, cl=QMetaObject::WriteProperty, idx=41, argv=0x7fffffffa810) at /.../src/corelib/kernel/qmetaobject.cpp:243
#26 0x00007ffff7942a51 in QDeclarativePropertyPrivate::write (object=0x703220, property=..., value=..., context=0x755250, flags=...) at /.../src/declarative/qml/qdeclarativeproperty.cpp:1147
#27 0x00007ffff79ed6a1 in QDeclarativeObjectScriptClass::setProperty (this=0x733c80, obj=0x703220, name=@0x7fffffffad98: 0x750940, value=..., context=0x7fffef6a1048, evalContext=0x755250)
    at /.../src/declarative/qml/qdeclarativeobjectscriptclass.cpp:439
#28 0x00007ffff79ec7a0 in QDeclarativeObjectScriptClass::setProperty (this=0x733c80, object=0x6f4520, name=@0x7fffffffad98: 0x750940, value=...) at /.../src/declarative/qml/qdeclarativeobjectscriptclass.cpp:329
#29 0x00007ffff4dbc658 in QScript::DeclarativeObjectDelegate::put (this=0x6f55c0, object=0x7ffff7f85440, exec=0x7fffef6a1048, propertyName=..., value=..., slot=...) at /.../src/script/bridge/qscriptdeclarativeobject.cpp:99
#30 0x00007ffff4da6489 in QScriptObject::put (this=0x7ffff7f85440, exec=0x7fffef6a1048, propertyName=..., value=..., slot=...) at /.../src/script/bridge/qscriptobject.cpp:80
#31 0x00007ffff4c6a929 in QTJSC::JSValue::put (this=0x7fffffffaed0, exec=0x7fffef6a1048, propertyName=..., value=..., slot=...) at /.../src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSObject.h:658
#32 0x00007ffff4c99f10 in QTJSC::cti_op_put_by_id_generic (args=0x7fffffffaf10) at /.../src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.cpp:1224
#33 0x00007ffff4c994c3 in QTJSC::JITThunks::tryCacheGetByID (callFrame=0x16, codeBlock=0x7fffffffaea0, returnAddress=..., baseValue=..., propertyName=..., slot=..., stubInfo=0x7ffff7f85440)
    at /.../src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.cpp:926