QQuickItemView: fix crash when changing model

When visible items become invisible, ListView will try to cache
them and redisplay these items if necessary. However, we can't
cache items when changing to a new model, since the old one will
be deleted later

Fix by adding a flag to let ListView know we are clearing items
and prevent cache unnecessary items

Fixes: QTBUG-80203
Change-Id: I50dcd3f0586c93496b143bdad0e59751360501a8
Reviewed-by: Richard Moe Gustavsen <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/quick/items/qquickitemview_p_p.h b/src/quick/items/qquickitemview_p_p.h
index b31f53b2c0..a448cf9a38 100644
--- a/src/quick/items/qquickitemview_p_p.h
+++ b/src/quick/items/qquickitemview_p_p.h
@@ -316,6 +316,7 @@ public:
     bool inRequest : 1;
     bool runDelayedRemoveTransition : 1;
     bool delegateValidated : 1;
+    bool isClearing : 1;
 
 protected:
     virtual Qt::Orientation layoutOrientation() const = 0;