I'm in the process of porting the Qt 5 QML app to Qt 6. After having
some fun with the QML namespaces difference finally I've got all the
issues resolved and.... it crashed during startup.
Crash happened inside qproperty.cpp:
CompatPropertySafePoint::CompatPropertySafePoint(QBindingStatus
*status, QUntypedPropertyData *property)
: property(property)
{
// store a pointer to the currentBindingEvaluationState to avoid a
TLS lookup in
// the destructor (as these come with a non zero cost)
currentState = &status->currentCompatProperty; /////// this line crashes!
previousState = *currentState;
*currentState = this;
currentlyEvaluatingBindingList = &bindingStatus.currentlyEvaluatingBinding;
bindingState = *currentlyEvaluatingBindingList;
*currentlyEvaluatingBindingList = nullptr;
}
It happened because 'status' turned out to be 0xfeeefeeefeeefeee
Just in case here is the stack trace:
1 QtPrivate::CompatPropertySafePoint::CompatPropertySafePoint
qproperty.cpp
520 0x7ffa12c909f5
2
QObjectCompatProperty<QQuickItemPrivate,double,&QQuickItemPrivate::_qt_property_width_offset,{QQuickItemPrivate::setWidth,0},{QQuickItemPrivate::widthChanged,0},0>::bindingWrapper
qproperty_p.h 488 0x7ffa19b652f2
3 QPropertyBindingPrivate::evaluateRecursive_inline
qproperty_p.h
805 0x7ffa12a7b9fc
4 QPropertyBindingPrivate::evaluateRecursive
qproperty.cpp
297 0x7ffa12c90c2c
5 QQmlPropertyBindingJS::expressionChanged
qqmlpropertybinding.cpp
191 0x7ffa13fc1084
6 QQmlJavaScriptExpressionGuard_callback
qqmljavascriptexpression.cpp
585 0x7ffa13ef0dcd
7 QQmlNotifier::emitNotify
qqmlnotifier.cpp
105 0x7ffa13f5132a
8 QQmlData::signalEmitted
qqmlengine.cpp
387 0x7ffa13e84c2f
9 doActivate<0>
qobject.cpp
3815 0x7ffa12c7c7e0
10 QMetaObject::activate
qobject.cpp
3993 0x7ffa12c64ac1
11 QQmlVMEMetaObject::activate
qqmlvmemetaobject.cpp
1297 0x7ffa140cd866
12 QQmlVMEMetaObject::writeVarProperty
qqmlvmemetaobject.cpp
1112 0x7ffa140cd0f9
13 QQmlVMEMetaObject::setVMEProperty
qqmlvmemetaobject.cpp
1215 0x7ffa140c9135
14 QV4::QObjectWrapper::setProperty
qv4qobjectwrapper.cpp
580 0x7ffa13ccb93c
15 QV4::QObjectWrapper::setQmlProperty
qv4qobjectwrapper.cpp
475 0x7ffa13cca868
16 QV4::QQmlContextWrapper::virtualPut
qv4qmlcontext.cpp
438 0x7ffa13cc2676
17 QV4::Object::put
qv4object_p.h
318 0x7ffa1396bbad
18 QV4::ExecutionContext::setProperty
qv4context.cpp
318 0x7ffa13b7bd95
19 QV4::Runtime::StoreNameSloppy::call
qv4runtime.cpp
1004 0x7ffa13d3bc69
20 QV4::Moth::VME::interpret
qv4vme_moth.cpp
694 0x7ffa13da7b42
... <More>
Any hints on how to troubleshoot further?
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