Details
-
Bug
-
Resolution: Fixed
-
P1: Critical
-
6.7.0
-
None
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msvc2019_64
-
Windows
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b91a26ae3 (dev), 5b62b99f3 (6.7), ef54690ee (tqtc/lts-6.5)
Description
When two inline components are defined in the same file, and they have an item with the same id, and that id is referenced in a PropertyChanges in each component, an access violation occurs in a thread named QQmlThread in the std::_Atomic_storage<int,4>::load method. It does not require instantiating the components, only that the QML file component is loaded. Below I have the minimum QML code needed to trigger the crash, and have it in a minimal project to trigger the crash here
import QtQuick
Item {
component First : Item {
Item {
id: a
}
states: [
State {
name: "test1"
PropertyChanges {
a.enabled: false
}
}
]
}
component Second : Item {
Item {
id: a
}
states: [
State {
name: "test2"
PropertyChanges {
a.enabled: false
}
}
]
}
}
Here is the call stack for the exception also
Qt6Qmld!std::_Atomic_storage<int,4>::load Qt6Qmld!QAtomicOps<int>::loadRelaxed<int> Qt6Qmld!QBasicAtomicInteger<int>::loadRelaxed Qt6Qmld!QQmlRefCount::addref Qt6Qmld!QQmlPropertyCacheVector::set Qt6Qmld!QQmlPendingGroupPropertyBindings::resolveMissingPropertyCaches Qt6Qmld!QQmlTypeCompiler::compile Qt6Qmld!QQmlTypeData::compile Qt6Qmld!QQmlTypeData::done Qt6Qmld!QQmlDataBlob::tryDone Qt6Qmld!QQmlTypeLoader::setCachedUnit Qt6Qmld!QQmlTypeLoader::loadWithCachedUnitThread Qt6Qmld!QQmlTypeLoaderThread::loadWithCachedUnitThread Qt6Qmld!std::invoke<void (__cdecl QQmlTypeLoaderThread::*&)(QQmlRefPointer<QQmlDataBlob> const &,QQmlPrivate::CachedQmlUnit const *),QQmlTypeLoaderThread *,QQmlRefPointer<QQmlDataBlob>,QQmlPrivate::CachedQmlUnit const *> Qt6Qmld!std::_Apply_impl<void (__cdecl QQmlTypeLoaderThread::*&)(QQmlRefPointer<QQmlDataBlob> const &,QQmlPrivate::CachedQmlUnit const *),std::tuple<QQmlTypeLoaderThread *,QQmlRefPointer<QQmlDataBlob>,QQmlPrivate::CachedQmlUnit const *>,0,1,2> Qt6Qmld!std::apply<void (__cdecl QQmlTypeLoaderThread::*&)(QQmlRefPointer<QQmlDataBlob> const &,QQmlPrivate::CachedQmlUnit const *),std::tuple<QQmlTypeLoaderThread *,QQmlRefPointer<QQmlDataBlob>,QQmlPrivate::CachedQmlUnit const *> > Qt6Qmld!`QQmlThread::createMessageFromMethod<void (__cdecl QQmlTypeLoaderThread::*)(QQmlRefPointer<QQmlDataBlob> const &,QQmlPrivate::CachedQmlUnit const *),QQmlRefPointer<QQmlDataBlob> const &,QQmlPrivate::CachedQmlUnit const * &>'::`2'::I::call Qt6Qmld!QQmlThreadPrivate::threadEvent Qt6Qmld!QQmlThreadPrivate::event Qt6Cored!QCoreApplicationPrivate::notify_helper Qt6Cored!doNotify Qt6Cored!QCoreApplication::notify Qt6Guid!QGuiApplication::notify Qt6Cored!QCoreApplication::notifyInternal2 Qt6Cored!QCoreApplication::sendEvent Qt6Cored!QCoreApplicationPrivate::sendPostedEvents Qt6Cored!QEventDispatcherWin32::sendPostedEvents Qt6Cored!QEventDispatcherWin32::processEvents Qt6Cored!QEventLoop::processEvents Qt6Cored!QEventLoop::exec Qt6Cored!QThread::exec Qt6Cored!QThread::run Qt6Cored!QThreadPrivate::start KERNEL32!BaseThreadInitThunk ntdll!RtlUserThreadStart
It's worth noting that this is null in the std::_Atomic_storage<int,4>::load stack frame