[Qtwebengine] Problems with WebEngine as qml component

[Michal Klocek]

Hi

Your stack trace complains about WebView, which
is part on qtwebview module, so most likely the issue is there.
I do not think anybody from web engine team works
on qtwebview. Please open bug report and provide platform details.

Br

Michal

On 5/28/19 10:41 PM, Adam Treat wrote:
> Hi,
> 
> Has anyone seen problems with WebEngine QML component that looks like
> following backtrace?
> 
> QQmlComponent: Component is not ready
> QObject::connect: invalid null parameter
> QObject::connect: invalid null parameter
> QObject::connect: invalid null parameter
> QObject::connect: invalid null parameter
> 
> Thread 1 "app" received signal SIGSEGV, Segmentation fault.
> 0x76e11a64 in QQuickItem::setParentItem(QQuickItem*) () from
> /usr/lib/libQt5Quick.so.5
> (gdb) bt
> #0  0x76e11a64 in QQuickItem::setParentItem(QQuickItem*) () from
> /usr/lib/libQt5Quick.so.5
> #1  0x71714c1c in QWebEngineWebViewPrivate::QQuickWebEngineViewPtr::init
> (this=this at entry=0xcafa0) at
> /usr/src/debug/qtwebview/5.9.4+gitAUTOINC+e00b5892ac-r0/git/src/webview/qwebview_webengine.cpp:232
> #2  0x71714d40 in
> QWebEngineWebViewPrivate::QQuickWebEngineViewPtr::operator->
> (this=0xcafa0) at
> /usr/src/debug/qtwebview/5.9.4+gitAUTOINC+e00b5892ac-r0/git/src/webview/qwebview_webengine_p.h:109
> #3  QWebEngineWebViewPrivate::setUrl (this=0xcaf90, url=...) at
> /usr/src/debug/qtwebview/5.9.4+gitAUTOINC+e00b5892ac-r0/git/src/webview/qwebview_webengine.cpp:91
> #4  0x71715ae0 in QQuickWebView::qt_static_metacall (_o=0xcc320,
> _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at
> .moc/moc_qquickwebview_p.cpp:278
> #5  0x761e1f1c in ?? () from /usr/lib/libQt5Qml.so.5
> 
> I am initialing QtWebView just after gui app instance like this:
> 
>       QGuiApplication app(argc, argv);
>       QtWebView::initialize();
> 
> Cheers,
> Adam
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