QDeclarativeViewer crashes on shutdown asynchronous is activated for Image and the worker thread did not finish, yet.

QDeclarativeViewer crashes on shutdown asynchronous is activated for Image and the worker thread did not finish, yet.

This only leads to a crash if some kind of memory protection is enabled (e.g. debug mode on Windows, MallocScribble on Mac).

For details see: QTCREATORBUG-6219

stack trace:

QtCored4.dll!QMutex::lock() Line 151 + 0x5 bytes C++
QtDeclaratived4.dll!QDeclarativePixmapReader::cancel(QDeclarativePixmapReply * reply=0x0e648540) Line 527 C++
QtDeclaratived4.dll!QDeclarativePixmapData::release() Line 754 C++
QtDeclaratived4.dll!QDeclarativePixmap::~QDeclarativePixmap() Line 864 C++
QtDeclaratived4.dll!QDeclarativeImageBasePrivate::~QDeclarativeImageBasePrivate() + 0x44 bytes C++
QtDeclaratived4.dll!QDeclarativeImagePrivate::~QDeclarativeImagePrivate() + 0xf bytes C++
QtDeclaratived4.dll!QDeclarativeImagePrivate::`scalar deleting destructor'() + 0xf bytes C++
QtGuid4.dll!QScopedPointerDeleter<QGraphicsItemPrivate>::cleanup(QGraphicsItemPrivate * pointer=0x0ef650c0) Line 62 + 0x20 bytes C++
QtGuid4.dll!QScopedPointer<QGraphicsItemPrivate,QScopedPointerDeleter<QGraphicsItemPrivate> >::~QScopedPointer<QGraphicsItemPrivate,QScopedPointerDeleter<QGraphicsItemPrivate> >()
QtGuid4.dll!QGraphicsItem::~QGraphicsItem() Line 1513 + 0x15 bytes C++
QtGuid4.dll!QGraphicsObject::~QGraphicsObject() + 0x2e bytes C++
QtDeclaratived4.dll!QDeclarativeItem::~QDeclarativeItem() Line 1685 + 0x1f bytes C++
QtDeclaratived4.dll!QDeclarativeImplicitSizeItem::~QDeclarativeImplicitSizeItem() + 0xf bytes C++
QtDeclaratived4.dll!QDeclarativeImageBase::~QDeclarativeImageBase() Line 63 + 0x8 bytes C++
QtDeclaratived4.dll!QDeclarativeImage::~QDeclarativeImage() Line 118 + 0x8 bytes C++
QtDeclaratived4.dll!QDeclarativePrivate::QDeclarativeElement<QDeclarativeImage>::~QDeclarativeElement<QDeclarativeImage>() Line 87 + 0xf bytes C++
QtDeclaratived4.dll!QDeclarativePrivate::QDeclarativeElement<QDeclarativeImage>::`scalar deleting destructor'() + 0xf bytes C++
QtGuid4.dll!QGraphicsItem::~QGraphicsItem() Line 1488 + 0x39 bytes C++
QtGuid4.dll!QGraphicsObject::~QGraphicsObject() + 0x2e bytes C++
QtDeclaratived4.dll!QDeclarativeItem::~QDeclarativeItem() Line 1685 + 0x1f bytes C++
QtDeclaratived4.dll!QDeclarativeRectangle::~QDeclarativeRectangle() + 0xf bytes C++
QtDeclaratived4.dll!QDeclarativePrivate::QDeclarativeElement<QDeclarativeRectangle>::~QDeclarativeElement<QDeclarativeRectangle>() Line 87 + 0xf bytes C++
QtDeclaratived4.dll!QDeclarativePrivate::QDeclarativeElement<QDeclarativeRectangle>::`scalar deleting destructor'() + 0xf bytes C++
QtGuid4.dll!QGraphicsItem::~QGraphicsItem() Line 1488 + 0x39 bytes C++
QtGuid4.dll!QGraphicsObject::~QGraphicsObject() + 0x2e bytes C++
QtDeclaratived4.dll!QDeclarativeItem::~QDeclarativeItem() Line 1685 + 0x1f bytes C++
QtDeclaratived4.dll!QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement<QDeclarativeItem>() Line 87 + 0xf bytes C++
QtDeclaratived4.dll!QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::`scalar deleting destructor'() + 0xf bytes C++
QtCored4.dll!qDeleteInEventHandler(QObject * o=0x0f1ad8d8) Line 3986 + 0x21 bytes C++
QtCored4.dll!QObject::event(QEvent * e=0x0e8a8b50) Line 1200 + 0xc bytes C++
QtDeclaratived4.dll!QDeclarativeItem::event(QEvent * ev=0x0e8a8b50) Line 3651 C++