Crash with ListView having a section delegate when model resets

1   QQuickListViewPrivate::setSectionHelper(QQmlContext *, QQuickItem *, QString const&)   0x7ffff3b88fe5 
2   QQuickListViewPrivate::getSectionItem(QString const&)                                  0x7ffff3b8f58a 
3   QQuickListViewPrivate::updateStickySections() [clone .part.0]                          0x7ffff3b914a2 
4   QQuickItemViewPrivate::layout()                                                        0x7ffff3b73655 
5   QQuickWindowPrivate::polishItems()                                                     0x7ffff38d12ad 
6   QSGThreadedRenderLoop::polishAndSync(QSGThreadedRenderLoop::Window *, bool)            0x7ffff3b36b73 
7   QQuickWindow::event(QEvent *)                                                          0x7ffff38d4c5e 
8   QApplicationPrivate::notify_helper(QObject *, QEvent *)                                0x7ffff3f8b7c5 
9   QgsApplication::notify(QObject *, QEvent *)                                            0x555557276773 
10  QCoreApplication::notifyInternal2(QObject *, QEvent *)                                 0x7ffff197cd58 
11  QPlatformWindow::deliverUpdateRequest()                                                0x7ffff21f7785 
12  QPlatformWindow::windowEvent(QEvent *)                                                 0x7ffff21f536d 
13  QApplication::notify(QObject *, QEvent *)                                              0x7ffff3f97773 
14  QgsApplication::notify(QObject *, QEvent *)                                            0x555557276773 
15  QCoreApplication::notifyInternal2(QObject *, QEvent *)                                 0x7ffff197cd58 
16  QTimerInfoList::activateTimers()                                                       0x7ffff1b332ca 
17  QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)             0x7ffff1b377a5 
18  QXcbUnixEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)          0x7fffefd75d92 
19  QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)                                0x7ffff19896e2 
20  QCoreApplication::exec()                                                               0x7ffff19857a8}}

diff --git a/src/quick/items/qquicklistview.cpp b/src/quick/items/qquicklistview.cpp
index 54b1157881..9f757ed5ee 100644
--- a/src/quick/items/qquicklistview.cpp
+++ b/src/quick/items/qquicklistview.cpp
@@ -1080,7 +1080,8 @@ QQuickItem * QQuickListViewPrivate::getSectionItem(const QString &section)
         sectionCache[i] = nullptr;
         sectionItem->setVisible(true);
         QQmlContext *context = QQmlEngine::contextForObject(sectionItem)->parentContext();
-        setSectionHelper(context, sectionItem, section);
+        if (context)
+            setSectionHelper(context, sectionItem, section);
     } else {
         QQmlComponent* delegate = sectionCriteria->delegate();
         const bool reuseExistingContext = delegate->isBound();