[Reg 5.7->5.9] QQuickPixmapReader thread's crash on exit

1  QSharedDataPointer<QQuickImageProviderOptionsPrivate>::operator-> qshareddata.h            78   0x5b8c7d2a 
2  QQuickImageProviderOptions::preserveAspectRatioCrop               qquickimageprovider.cpp  584  0x5b8c75ef 
3  readImage                                                         qquickpixmapcache.cpp    389  0x5b8b0626 
4  QQuickPixmapReader::processJob                                    qquickpixmapcache.cpp    797  0x5b8af9d1 
5  QQuickPixmapReader::processJobs                                   qquickpixmapcache.cpp    668  0x5b8af0e0 
6  QQuickPixmapReaderThreadObject::event                             qquickpixmapcache.cpp    578  0x5b8ae5a2 
7  QApplicationPrivate::notify_helper                                qapplication.cpp         3713 0x5b02900b 
8  QApplication::notify                                              qapplication.cpp         3085 0x5b0252bd 
9  QCoreApplication::notifyInternal2                                 qcoreapplication.cpp     1013 0x562408ac 
10 QCoreApplication::sendEvent                                       qcoreapplication.h       231  0x56249739 
11 QCoreApplicationPrivate::sendPostedEvents                         qcoreapplication.cpp     1673 0x56241c0c 
12 QEventDispatcherWin32::sendPostedEvents                           qeventdispatcher_win.cpp 1042 0x562d8f74 
13 qt_internal_proc                                                  qeventdispatcher_win.cpp 218  0x562d72fa 
14 SetManipulationInputTarget                                        USER32                        0x74d084f3 
15 CallWindowProcW                                                   USER32                        0x74ce6c40 
16 DispatchMessageW                                                  USER32                        0x74ce6541 
17 DispatchMessageW                                                  USER32                        0x74ce6300 
18 QEventDispatcherWin32::processEvents                              qeventdispatcher_win.cpp 609  0x562d7c7e 
19 QEventLoop::processEvents                                         qeventloop.cpp           135  0x5623c21c 
20 QEventLoop::exec                                                  qeventloop.cpp           212  0x5623c427 
21 QThread::exec                                                     qthread.cpp              515  0x55fc426d 
22 QQuickPixmapReader::run                                           qquickpixmapcache.cpp    893  0x5b8aed46 
23 QThreadPrivate::start                                             qthread_win.cpp          380  0x55fce8cb 
24 BaseThreadInitThunk                                               KERNEL32                      0x754138f4 
25 RtlUnicodeStringToInteger                                         ntdll_77c70000                0x77cd5e13 
26 RtlUnicodeStringToInteger                                         ntdll_77c70000                0x77cd5dde