wasm: Fix assert/crash when tooltip window is closed and mouse moved

Fixes: QTBUG-92521
Pick-to: 5.15 6.2
Change-Id: I627fdcf3064321a3c1cb1140473038571ec78b9e
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/plugins/platforms/wasm/qwasmeventtranslator.h b/src/plugins/platforms/wasm/qwasmeventtranslator.h
index 3e772583af..7a87c541de 100644
--- a/src/plugins/platforms/wasm/qwasmeventtranslator.h
+++ b/src/plugins/platforms/wasm/qwasmeventtranslator.h
@@ -82,9 +82,9 @@ private:
     QMap <int, QPointF> pressedTouchIds;
 
 private:
-    QWindow *draggedWindow;
-    QWindow *pressedWindow;
-    QWindow *lastWindow;
+    QPointer<QWindow> draggedWindow;
+    QPointer<QWindow> pressedWindow;
+    QPointer<QWindow> lastWindow;
     Qt::MouseButtons pressedButtons;
 
     QWasmWindow::ResizeMode resizeMode;