Details
P2: Important Description
Accessing the contentsSize properties too soon after object creation, e.g. by assigning it to a property such as Layout.preferredWidth or accessing it in Component.onCompleted crashes.
import QtQuick 2.8
import QtQuick.Window 2.2
import QtWebEngine 1.3
Window {
visible: true
width: 640
height: 480
WebEngineView {
Component.onCompleted: console.log("Boom!", contentsSize)
}
}
Doing the same somewhat later (I tried a 1000ms Timer), I get a QSize returned as expected. It does not matter whether I actually set a URL or not.
Backtrace:
#0 0x00007fffca009354 in QtWebEngineCore::WebContentsAdapter::lastContentsSize() const () from /usr/lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5 #1 0x00007fffd5d3f771 in QQuickWebEngineView::contentsSize() const () from /usr/lib/x86_64-linux-gnu/libQt5WebEngine.so.5 #2 0x00007fffd5d554f0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5WebEngine.so.5 #3 0x00007fffd5d55f0b in QQuickWebEngineView::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5WebEngine.so.5 #4 0x00007ffff7354d95 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #5 0x00007ffff7355ae8 in QV4::QQmlValueTypeWrapper::get(QV4::Managed const*, QV4::String*, bool*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #6 0x00007ffff72b1431 in QV4::RuntimeHelpers::objectDefaultValue(QV4::Object const*, int) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #7 0x00007ffff72b5d6a in QV4::Value::toQStringNoThrow() const () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #8 0x00007ffff7376e24 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #9 0x00007ffff72b358e in QV4::Runtime::method_callProperty(QV4::ExecutionEngine*, int, QV4::CallData*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #10 0x00007ffff72a9c28 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #11 0x00007ffff72ab373 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #12 0x00007ffff7227e3c in QV4::ExecutionContext::call(QV4::Scope&, QV4::CallData*, QV4::Function*, QV4::FunctionObject const*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #13 0x00007ffff73474f1 in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*, QV4::Scope&) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #14 0x00007ffff72e01bb in QQmlBoundSignalExpression::evaluate(void**) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #15 0x00007ffff72e161b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #16 0x00007ffff73239c7 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #17 0x00007ffff72c31e4 in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #18 0x00007ffff6bfc97e in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 #19 0x00007ffff735a960 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #20 0x00007ffff72d68ce in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #21 0x00007ffff72d69e7 in QQmlComponentPrivate::completeCreate() () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5 #22 0x00007ffff72d67ba in QQmlComponent::create(QQmlContext*) () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5