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Details

Type: Bug
Resolution: Done
Priority: P1: Critical
Fix Version/s: 5.11.3, 5.12.0 Beta 2
Affects Version/s: 5.9.2, 5.11.1
Component/s: Quick: Core Declarative QML
Labels:
None
Environment:
Windows 10, Qt 5.9.2

Commits:
10095542d16fc9f5b2c585abf72fe00be9debff3 (qt/qtdeclarative/5.11) 2ededacdde179357eb686901202789bbee35771a (qt/qtdeclarative/5.9)

Description

After upgrading from Qt 5.7 to Qt 5.9.2 I started to get the crashes (100% reproducible) when using XAnimator during the startup of my two-window based QML application.

From the call-stack (shown below) and debugging it is visible that this fragment is problematic:

m_controller->window()

https://github.com/qt/qtdeclarative/blob/5.9/src/quick/util/qquickanimatorjob.cpp#L220

Indeed, m_controller is a null pointer.

Comparing to the Qt 5.7 it's visible that there were changes in that region of code, so this may be a kind of regression.

Full call-stack is:

1  QQuickAnimatorController::window
                                          qquickanimatorcontroller_p.h 93   0x7ffb88e0696a 
2  QQuickAnimatorProxyJob::sceneGraphInitialized
                                          qquickanimatorjob.cpp        216  0x7ffb88dfcd7f 
3  QtPrivate::FunctorCall<QtPrivate::IndexesList<>,QtPrivate::List<>,void,void (__cdecl QQuickAnimatorProxyJob:: *)(void) __ptr64>::call 
                                          qobjectdefs_impl.h           136  0x7ffb88e03711 
4  QtPrivate::FunctionPointer<void (__cdecl QQuickAnimatorProxyJob:: *)(void) __ptr64>::call<QtPrivate::List<>,void>                     
                                          qobjectdefs_impl.h           170  0x7ffb88dffe3d 
5  QtPrivate::QSlotObject<void (__cdecl QQuickAnimatorProxyJob:: *)(void) __ptr64,QtPrivate::List<>,void>::impl                          
                                          qobject_impl.h               121  0x7ffb88e04ff6 
6  QtPrivate::QSlotObjectBase::call
                                          qobject_impl.h               101  0x6da09718     
7  QMetaCallEvent::placeMetaCall
                                          qobject.cpp                  501  0x6da01696     
8  QObject::event
                                          qobject.cpp                  1246 0x6d9fa05f     
9  QCoreApplicationPrivate::notify_helper
                                          qcoreapplication.cpp         1153 0x6d9a2c7e     
10 doNotify
                                          qcoreapplication.cpp         1093 0x6d9a4408     
11 QCoreApplication::notify
                                          qcoreapplication.cpp         1080 0x6d9a0501     
12 QGuiApplication::notify
                                          qguiapplication.cpp          1689 0x7ffb84ea99a9 
13 QCoreApplication::notifyInternal2
                                          qcoreapplication.cpp         1018 0x6d9a1dc6     
14 QCoreApplication::sendEvent
                                          qcoreapplication.h           233  0x6d9ace32     
15 QCoreApplicationPrivate::sendPostedEvents
                                          qcoreapplication.cpp         1678 0x6d9a3682     
16 QEventDispatcherWin32::sendPostedEvents
                                          qeventdispatcher_win.cpp     1064 0x6da5fe1a     
17 qt_plugin_query_metadata
                                          qwindowsd                         0x7ffb96310754 
18 qt_internal_proc
                                          qeventdispatcher_win.cpp     237  0x6da5daf7     
19 CallWindowProcW
                                          USER32                            0x7ffbd8e8b85d 
20 DispatchMessageW
                                          USER32                            0x7ffbd8e8b1ef 
21 QEventDispatcherWin32::processEvents
                                          qeventdispatcher_win.cpp     628  0x6da5e50b     
22 qt_plugin_query_metadata
                                          qwindowsd                         0x7ffb96310714 
23 QEventLoop::processEvents
                                          qeventloop.cpp               135  0x6d99c198     
24 QEventLoop::exec
                                          qeventloop.cpp               212  0x6d99c3de     
25 QCoreApplication::exec
                                          qcoreapplication.cpp         1291 0x6d99fa6f     
26 QGuiApplication::exec
                                          qguiapplication.cpp          1680 0x7ffb84ea9948 
27 main
                                          main.cpp                     174  0x7ff6bab76a60 
28 invoke_main
                                          exe_common.inl               65   0x7ff6babb63b4 
29 __scrt_common_main_seh
                                          exe_common.inl               253  0x7ff6babb6277 
30 __scrt_common_main
                                          exe_common.inl               296  0x7ff6babb613e 
31 mainCRTStartup
                                          exe_main.cpp                 17   0x7ff6babb63d9 
32 BaseThreadInitThunk
                                          KERNEL32                          0x7ffbdb1f1fe4 
33 RtlUserThreadStart
                                          ntdll
0x7ffbdb71ef91

Unfortunately, I am unable to create a self-contained code example.