unknown qml errors ,couldnt find the errors occured.

[nicker player]

1  QElapsedTimer::nsecsElapsed() const                                                                0x68cc1f0b 
2  QDebugMessageServiceImpl::sendDebugMessage(QtMsgType, QMessageLogContext const&, QString const&)   0x2d1f17ef 
3  DebugMessageHandler(QtMsgType, QMessageLogContext const&, QString const&)                          0x2d1f196e 
4  qt_message(QtMsgType, QMessageLogContext const&, const char *, char *)                             0x68a9ac3d 
5  QMessageLogger::fatal(const char *, ...) const                                                     0x68e1b2ac 
6  QThread::~QThread()                                                                                0x68a9fce2 
7  QQmlDebugServerImpl::~QQmlDebugServerImpl()                                                        0x307379d3 
8  QQmlDebugConnectorFactory::~QQmlDebugConnectorFactory()                                            0x664a0ca4 
9  QQmlDebugServerFactory::~QQmlDebugServerFactory()                                                  0x30738052 
10 QLibraryPrivate::unload(QLibraryPrivate::UnloadFlag)                                               0x68c6039b 
11 QFactoryLoaderPrivate::~QFactoryLoaderPrivate()                                                    0x68c587b7 
12 QFactoryLoaderPrivate::~QFactoryLoaderPrivate()                                                    0x68c5889b 
13 QObject::~QObject()                                                                                0x68ca0ef4 
14 __tcf_0                                                                                            0x664a1afe 
15 _execute_onexit_table                                                                              0x664ce361 
16 _CRT_INIT *12                                                                                      0x662c116c 
17 __DllMainCRTStartup                                                                                0x662c1281 
18 DllMainCRTStartup *12                                                                              0x662c13a3 
19 ntdll!RtlIpv6AddressToStringA                                                                      0x77586526 
20 ntdll!RtlDeactivateActivationContextUnsafeFast                                                     0x7755719e 
21 ntdll!LdrShutdownProcess                                                                           0x7756e93d 
22 ??    

[Pl45m4]

@nicker-player

Isn't that the same issue as in your last topic here?
Debug your application, post your code, describe what your are doing...

[nicker player]

yeah but i dont know how to debug the code . I tried a lot of ways .But its hard for me to do that.

[arceajin]

please provide a Minimal reproducible example

[nicker player]

;

UiBaseQml::UiBaseQml()
{
   qDebug()<<"UiBaseQml::UiBaseQml()";
}

int UiBaseQml::onCreateAllChild(){
   QQmlContext * context = rootContext();
   context->setContextProperty("dataRoot", this);
   context->setContextProperty("dataContext",mDataJson);
}
int UiBaseQml::onInitCtrl(){
   setAttribute(Qt::WA_AlwaysStackOnTop);
   setClearColor(Qt::transparent);
   setResizeMode(QQuickWidget::SizeViewToRootObject);

   QString t_url = "qrc:/qres/qml/default.qml";
   if(mDataJson.contains("url")){
       t_url = mDataJson.find("url").value().toString();
   }
   setSource(QUrl(t_url));

   if(mDataJson.contains("title")){
      QString t_title = mDataJson.find("title").value().toString();
   }
}
int UiBaseQml::onInitSlots(){
   connect(this,SIGNAL(statusChanged(QQuickWidget::Status)),this,SLOT(onChangeState(QQuickWidget::Status)));
}
int UiBaseQml::onRelayout(){
   QWidget * t_parent = (QWidget *)parent();
   auto s = (t_parent->size()) / 2;
   s = (t_parent->size() - size()) / 2;
   move(s.width(), s.height());
}

int UiBaseQml::onInit(void* p ){
   setParent((QWidget *)p);
   onCreateAllChild();
   onInitCtrl();
   onInitSlots();
   onRelayout();
}

int UiBaseQml::onSendMsg(const QJsonObject & value){
   mDataJson.insert("msg",value);
}

//when added the code below ,the errors occured.
UiBaseQml * m_WidgetQml =NULL;
if(m_WidgetQml!=NULL){
m_WidgetQml = new UiBaseQml();
QJsonObject t_data = {{"url","qrc:/qres/qml/default.qml"}};
m_WidgetQml->setDataJson(t_data);
m_WidgetQml->onInit(this);
m_WidgetQml->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
m_WidgetQml->setResizeMode(QQuickWidget::ResizeMode::SizeRootObjectToView);
mLayoutMain->addWidget(m_WidgetQml);
}

[nicker player]

I found that if I used the cef module of the googles,sometimes came out the errors.If I removed these codes or removed the cef module it will run normally.I dont konw why.Maybe the cef messages loops influenced the qt loops?

[Pl45m4]

@nicker-player

What is "cef module of googles"?

[nicker player]

its my mistake.I used the cefview to replacing the module of the webengine.cause the mingw-make version dosent support web view on the windo ws platform.the cef is Chromium Embedded Framework.
and by the way.I found a line from the programe output:

DirectWrite: CreateFontFaceFromHDC() failed (ָʾÊäÈëÎļþ (ÀýÈç×ÖÌåÎļþ) ÖеĴíÎó¡£) for QFontDef(Family="Fixedsys", pointsize=13.5, pixelsize=20, styleHint=5, weight=50, stretch=100, hintingPreference=0) LOGFONT("Fixedsys", lfWidth=0, lfHeight=-20) dpi=144

so is it possible that the code here caused the errors?

https://bugreports.qt.io/browse/QTBUG-57180
and i used the qt 5.14.0 msvc 2017
Based on Qt 5.14.0 (MSVC 2017, 32 bit)
Built on Dec 10 2019 12:27:13
From revision 017ed74400

[ChrisW67]

@nicker-player

its my mistake.I used the cefview to replacing the module of the webengine.cause the mingw-make version dosent support web view on the windo ws platform.the cef is Chromium Embedded Framework.

and i used the qt 5.14.0 msvc 2017

What does MingW have to do with this? You claim to be using the MSVC libraries and thus toolchain.

You do not say where you put this code. However, your code, my comments:

UiBaseQml * m_WidgetQml =NULL;
// ^^^ m_WidgetQml is NULL
// vvv so this condition is never true
if(m_WidgetQml!=NULL){
    m_WidgetQml = new UiBaseQml();
    QJsonObject t_data = {{"url","qrc:/qres/qml/default.qml"}};
    m_WidgetQml->setDataJson(t_data);
    m_WidgetQml->onInit(this);
    m_WidgetQml->setSizePolicy(QSizePolicy::Expanding,QSizePolicy::Expanding);
    m_WidgetQml->setResizeMode(QQuickWidget::ResizeMode::SizeRootObjectToView);
    mLayoutMain->addWidget(m_WidgetQml);
}
// m_WidgetQml is still NULL and none of that setup happened.
// m_WidgetQml is a local variable and will go out of whatever scope contains this code.

Is that really what you expected?

[nicker player]

@ChrisW67
on ,its my mistake. the code is
if(m_WidgetQml==NULL){
in fact.
what I used the != just a pre code .so I thought it would be caused by the third web view components of the programe.the messages loops influnced the qt msg loops.