Editing: Null-check in FrameSelection::updteAppearancea

Source/core/editing/FrameSelection.cpp

Index: Source/core/editing/FrameSelection.cpp
diff --git a/Source/core/editing/FrameSelection.cpp b/Source/core/editing/FrameSelection.cpp
index e926915f5b7dda89c0a78697375a17edb1f7c485..a782a75ab973ac89131efb089a23d87a3b59d559 100644
--- a/Source/core/editing/FrameSelection.cpp
+++ b/Source/core/editing/FrameSelection.cpp
@@ -1602,7 +1602,7 @@ void FrameSelection::updateAppearance(ResetCaretBlinkOption option)
     if (startPos.isNotNull() && endPos.isNotNull() && selection.visibleStart() != selection.visibleEnd()) {
         RenderObject* startRenderer = startPos.deprecatedNode()->renderer();
         RenderObject* endRenderer = endPos.deprecatedNode()->renderer();
-        if (startRenderer->view() == view && endRenderer->view() == view)
+        if (startRenderer && endRenderer && startRenderer->view() == view && endRenderer->view() == view)
             view->setSelection(startRenderer, startPos.deprecatedEditingOffset(), endRenderer, endPos.deprecatedEditingOffset());
     }
 }