QQuickPopup: reset the popup item pointer on destruction

To ensure null instead of dangling pointer if the popup item gets
accessed by QQuickAttachedObject during the popup's destruction.

Change-Id: I55d04133f11f5a10a395c104d9db5db8db8f842f
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/quicktemplates2/qquickpopup.cpp b/src/quicktemplates2/qquickpopup.cpp
index ace82553..4dd07b07 100644
--- a/src/quicktemplates2/qquickpopup.cpp
+++ b/src/quicktemplates2/qquickpopup.cpp
@@ -509,6 +509,7 @@ QQuickPopup::~QQuickPopup()
     setParentItem(nullptr);
     d->popupItem->ungrabShortcut();
     delete d->popupItem;
+    d->popupItem = nullptr;
 }
 
 /*!