c++ - QT QML/C++ 应用程序在退出时崩溃

Question

我有一个 QML/C++ 混合应用程序，它相当复杂，有几个线程在后台更新数据。一切都完美无缺，除了当我使某个 ListView 可见、填充它然后退出应用程序时，调试器在以下位置因断言失败而中断:

QDeclarativeAbstractBinding::~QDeclarativeAbstractBinding()
{
    Q_ASSERT(m_prevBinding == 0); //<---- THIS GUY IS THE OFFENDING LINE
    Q_ASSERT(m_mePtr == 0); 
}   

这是堆栈跟踪:

>   QtCored4.dll!qt_message_output(QtMsgType msgType, const char * buf)  Line 2270  C++
    QtCored4.dll!qt_message(QtMsgType msgType, const char * msg, char * ap)  Line 2328 + 0x12 bytes C++
    QtCored4.dll!qFatal(const char * msg, ...)  Line 2511 + 0xf bytes   C++
    QtCored4.dll!qt_assert(const char * assertion, const char * file, int line)  Line 2027 + 0x16 bytes C++
    QtDeclaratived4.dll!QDeclarativeAbstractBinding::~QDeclarativeAbstractBinding()  Line 293 + 0x1e bytes  C++
    QtDeclaratived4.dll!QDeclarativeCompiledBindingsPrivate::Binding::~Binding()  + 0x3d bytes  C++
    QtDeclaratived4.dll!`eh vector destructor iterator'(void * ptr, unsigned int size, int count, void (void *)* pDtor)  + 0x6b bytes   C++
    QtDeclaratived4.dll!QDeclarativeCompiledBindingsPrivate::Binding::`vector deleting destructor'()  + 0x26 bytes  C++
    QtDeclaratived4.dll!QDeclarativeCompiledBindings::~QDeclarativeCompiledBindings()  Line 274 + 0x33 bytes    C++
    QtDeclaratived4.dll!QDeclarativeCompiledBindings::`scalar deleting destructor'()  + 0xf bytes   C++
    QtDeclaratived4.dll!QDeclarativeRefCount::release()  Line 66 + 0x20 bytes   C++
    QtDeclaratived4.dll!QDeclarativeCompiledBindingsPrivate::Binding::destroy()  Line 328   C++
    QtDeclaratived4.dll!QDeclarativeData::destroyed(QObject * object)  Line 1000    C++
    QtDeclaratived4.dll!QDeclarativeData::destroyed(QAbstractDeclarativeData * d, QObject * o)  Line 463    C++
    QtCored4.dll!QObject::~QObject()  Line 860 + 0x11 bytes C++
    QtDeclaratived4.dll!QDeclarativeAbstractAnimation::~QDeclarativeAbstractAnimation()  Line 94 + 0x2a bytes   C++
    QtDeclaratived4.dll!QDeclarativePropertyAnimation::~QDeclarativePropertyAnimation()  Line 1827 + 0x8 bytes  C++
    QtDeclaratived4.dll!QDeclarativePrivate::QDeclarativeElement<QDeclarativePropertyAnimation>::~QDeclarativeElement<QDeclarativePropertyAnimation>()  Line 90 + 0xf bytes C++
    QtDeclaratived4.dll!QDeclarativePrivate::QDeclarativeElement<QDeclarativePropertyAnimation>::`scalar deleting destructor'()  + 0xf bytes    C++
    QtCored4.dll!QObjectPrivate::deleteChildren()  Line 1949 + 0x24 bytes   C++
    QtCored4.dll!QObject::~QObject()  Line 947  C++
    QtDeclaratived4.dll!QDeclarativeTransition::~QDeclarativeTransition()  Line 168 + 0x9 bytes C++
    QtDeclaratived4.dll!QDeclarativePrivate::QDeclarativeElement<QDeclarativeTransition>::~QDeclarativeElement<QDeclarativeTransition>()  Line 90 + 0xf bytes   C++
    QtDeclaratived4.dll!QDeclarativePrivate::QDeclarativeElement<QDeclarativeTransition>::`scalar deleting destructor'()  + 0xf bytes   C++
    QtCored4.dll!QObjectPrivate::deleteChildren()  Line 1949 + 0x24 bytes   C++
    QtCored4.dll!QObject::~QObject()  Line 947  C++
    QtGuid4.dll!QGraphicsObject::~QGraphicsObject()  + 0x48 bytes   C++
    QtDeclaratived4.dll!QDeclarativeItem::~QDeclarativeItem()  Line 1504 + 0x1f bytes   C++
    QtDeclaratived4.dll!QDeclarativeRectangle::~QDeclarativeRectangle()  + 0xf bytes    C++
    QtDeclaratived4.dll!QDeclarativePrivate::QDeclarativeElement<QDeclarativeRectangle>::~QDeclarativeElement<QDeclarativeRectangle>()  Line 90 + 0xf bytes C++
    QtDeclaratived4.dll!QDeclarativePrivate::QDeclarativeElement<QDeclarativeRectangle>::`scalar deleting destructor'()  + 0xf bytes    C++
    QtDeclaratived4.dll!QDeclarativeViewPrivate::~QDeclarativeViewPrivate()  Line 135 + 0x67 bytes  C++
    QtDeclaratived4.dll!QDeclarativeViewPrivate::`scalar deleting destructor'()  + 0xf bytes    C++
    QtCored4.dll!QScopedPointerDeleter<QObjectData>::cleanup(QObjectData * pointer)  Line 62 + 0x20 bytes   C++
    QtCored4.dll!QScopedPointer<QObjectData,QScopedPointerDeleter<QObjectData> >::~QScopedPointer<QObjectData,QScopedPointerDeleter<QObjectData> >()  Line 100 + 0x9 bytes  C++
    QtCored4.dll!QObject::~QObject()  Line 963 + 0x12 bytes C++
    QtGuid4.dll!QWidget::~QWidget()  Line 1620 + 0x25 bytes C++
    QtGuid4.dll!QFrame::~QFrame()  Line 242 + 0x8 bytes C++
    QtGuid4.dll!QAbstractScrollArea::~QAbstractScrollArea()  Line 526 + 0xf bytes   C++
    QtGuid4.dll!QGraphicsView::~QGraphicsView()  Line 1165 + 0xf bytes  C++
    QtDeclaratived4.dll!QDeclarativeView::~QDeclarativeView()  Line 300 + 0x9 bytes C++
    MyApplication.exe!QDeclarativeView::`scalar deleting destructor'()  + 0x10 bytes    C++
    QtCored4.dll!QObjectPrivate::deleteChildren()  Line 1949 + 0x24 bytes   C++
    QtGuid4.dll!QWidget::~QWidget()  Line 1602  C++
    QtGuid4.dll!QMainWindow::~QMainWindow()  Line 389 + 0x22 bytes  C++
    MyApplication.exe!MainWindow::~MainWindow()  Line 77 + 0x66 bytes   C++
    MyApplication.exe!MainWindow::`scalar deleting destructor'()  + 0xf bytes   C++
    MyApplication.exe!boost::checked_delete<MainWindow>(MainWindow * x)  Line 34 + 0x21 bytes   C++
    MyApplication.exe!boost::detail::sp_counted_impl_p<MainWindow>::dispose()  Line 78 + 0xc bytes  C++
    MyApplication.exe!boost::detail::sp_counted_base::release()  Line 103   C++
    MyApplication.exe!boost::detail::shared_count::~shared_count()  Line 221    C++
    MyApplication.exe!boost::shared_ptr<MainWindow>::~shared_ptr<MainWindow>()  + 0x12 bytes    C++
    MyApplication.exe!boost::shared_ptr<MainWindow>::reset()  Line 387  C++
    MyApplication.exe!main(int argc, char * * argv)  Line 68    C++
    MyApplication.exe!WinMain(HINSTANCE__ * instance, HINSTANCE__ * prevInstance, char * __formal, int cmdShow)  Line 131 + 0x12 bytes  C++
    MyApplication.exe!__tmainCRTStartup()  Line 547 + 0x2c bytes    C
    MyApplication.exe!WinMainCRTStartup()  Line 371 C
    kernel32.dll!@BaseThreadInitThunk@12()  + 0x12 bytes    
    ntdll.dll!___RtlUserThreadStart@8()  + 0x27 bytes   
    ntdll.dll!__RtlUserThreadStart@8()  + 0x1b bytes    

编辑:

问题:我怎样才能消除这个问题？我的代码可能有什么问题？没有关于如何发生这种情况的信息。

Answer 1

很抱歉回复晚了，我检查了我的 QML 文件，发现当我在单个“State”元素中定义多个具有相同目标的“PropertyChange”元素时会出现错误。我将同一项目的所有属性更改分组在一个“PropertyChange”元素中，问题就消失了。但这很奇怪，断言失败不是很确定。还尝试使用此信息重现错误，但未能成功。可能还有其他我想念的因素。无论如何谢谢。