Details
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Bug
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Resolution: Fixed
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P1: Critical
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6.8.1
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None
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Linux/X11
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dc60c305a20d518012d4f034c4fa2a7395ebf31f
Description
I have an app that was running perfectly fine with a debug build of Qt 6.8.0
Since I've updated to Qt 6.8.1 it randomly crashes during application start.
The crash always occurs because Q_ASSERT(engine->jsStackTop >= mark) in QV4::Scope::~Scope() fails, but not always at the exact same time as I can get different stack traces.
Using git bisect I was able to track the cause back to this change: https://codereview.qt-project.org/c/qt/qtdeclarative/+/592656
Here are a few examples of stacktraces:
qAbort()
qt_message_fatal<>()
qt_message()
QMessageLogger::fatal()
qt_assert()
QV4::Scope::~Scope()
QQmlScriptData::handleOwnScriptValueOrExecutableCU<>()
QQmlScriptData::ownScriptValue()
QQmlScriptBlob::hasScriptValue()
QQmlTypeLoader::injectedScript()
QQmlTypeLoader::Blob::addScriptImport()
QQmlTypeLoader::Blob::addImport()
QQmlTypeLoader::Blob::addImport()
QQmlTypeData::loadFromDiskCache()
QQmlTypeData::tryLoadFromDiskCache()
QQmlTypeData::dataReceived()
QQmlTypeLoader::setData()
QQmlTypeLoader::setData()
QQmlTypeLoader::loadThread()
PlainLoader::loadThread()
QQmlTypeLoader::doLoad<>()
QQmlTypeLoader::load()
QQmlTypeLoader::getType()
QQmlTypeData::resolveTypes()
QQmlTypeData::allDependenciesDone()
QQmlTypeLoader::setData()
QQmlTypeLoader::setData()
QQmlTypeLoader::loadThread()
QQmlTypeLoaderThread::loadThread()
std::__invoke_impl<>()
std::__invoke<>()
std::__apply_impl<>()
std::apply<>()
QQmlThread::createMessageFromMethod<>()::I::call()
QQmlThreadPrivate::threadEvent()
QQmlThreadPrivate::event()
QApplicationPrivate::notify_helper()
QApplication::notify()
QCoreApplication::notifyInternal2()
QCoreApplication::sendEvent()
QCoreApplicationPrivate::sendPostedEvents()
QCoreApplication::sendPostedEvents()
postEventSourceDispatch()
(/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.8000.0+0x5d5b4)
(/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.8000.0+0xbc716)
g_main_context_iteration
QEventDispatcherGlib::processEvents()
QEventLoop::processEvents()
QEventLoop::exec()
QThread::exec()
QThread::run()
QThreadPrivate::start()::$_1::operator()()
(anonymous namespace)::terminate_on_exception<>()
QThreadPrivate::start()
(/usr/lib/x86_64-linux-gnu/libc.so.6+0x9ca93)
(/usr/lib/x86_64-linux-gnu/libc.so.6+0x129c3b)
qt_assert() QV4::Scope::~Scope() QV4::QQmlContextWrapper::virtualPut() QV4::Object::put() QV4::ExecutionContext::setProperty() QV4::Runtime::StoreNameSloppy::call() <unknown>
qAbort()
qt_message_fatal<>()
qt_message()
QMessageLogger::fatal()
qt_assert()
QV4::Scope::~Scope()
toVariant()
QV4::ExecutionEngine::toVariant()
QQmlVMEMetaObject::readPropertyAsVariant()
QQmlVMEMetaObject::metaCall()
QMetaObject::metacall()
QMetaProperty::read()
getValueFromProperty()
QQuickShaderEffectPrivate::updateShaderVars()
QQuickShaderEffectPrivate::updateShader()
QQuickShaderEffectPrivate::maybeUpdateShaders()
QQuickShaderEffect::componentComplete()
QQmlObjectCreator::finalize()
QQmlIncubatorPrivate::incubate()
QQmlEnginePrivate::incubate()
QQmlComponent::create()
QQuickLoaderPrivate::_q_sourceLoaded()
QQuickLoaderPrivate::load()
QQuickLoader::componentComplete()
QQmlObjectCreator::finalize()
QQmlIncubatorPrivate::incubate()
QQmlEnginePrivate::incubate()
QQmlComponentPrivate::incubateObject()
QQmlDelegateModelPrivate::object()
QQmlDelegateModel::object()
QQuickRepeater::modelUpdated()
QQuickRepeater::qt_static_metacall()
QQuickRepeater::qt_metacall()
QMetaObject::metacall()
doActivate<>()
QMetaObject::activate()
QQmlInstanceModel::modelUpdated()
QQmlDelegateModelPrivate::emitModelUpdated()
QQmlDelegateModelGroupPrivate::emitModelUpdated()
QQmlDelegateModelPrivate::emitChanges()
QQmlDelegateModel::_q_itemsInserted()
QQmlDelegateModel::_q_rowsInserted()
QtPrivate::FunctorCall<>::call()::{lambda()#1}::operator()()
QtPrivate::FunctorCallBase::call_internal<>()
QtPrivate::FunctorCall<>::call()
QtPrivate::FunctionPointer<>::call<>()
QtPrivate::QCallableObject<>::impl()
QtPrivate::QSlotObjectBase::call()
doActivate<>()
QMetaObject::activate()
QAbstractItemModel::rowsInserted()
QAbstractItemModel::endInsertRows()