diff --git a/pyqtgraph/widgets/GraphicsView.py b/pyqtgraph/widgets/GraphicsView.py
index b3b921cd..3c553feb 100644
--- a/pyqtgraph/widgets/GraphicsView.py
+++ b/pyqtgraph/widgets/GraphicsView.py
@@ -399,9 +399,12 @@ class GraphicsView(QtGui.QGraphicsView):
         ev.ignore()  ## not sure why, but for some reason this class likes to consume drag events
 
     def _del(self):
-        if self.parentWidget() is None and self.isVisible():
-            msg = "Visible window deleted. To prevent this, store a reference to the window object."
-            warnings.warn(msg, RuntimeWarning, stacklevel=2)
+        try:
+            if self.parentWidget() is None and self.isVisible():
+                msg = "Visible window deleted. To prevent this, store a reference to the window object."
+                warnings.warn(msg, RuntimeWarning, stacklevel=2)
+        except RuntimeError:
+            pass
 
 if sys.version_info[0] == 3 and sys.version_info[1] >= 4:
     GraphicsView.__del__ = GraphicsView._del