Skip hit testing containers with invalid bounding boxes

third_party/WebKit/Source/core/layout/svg/LayoutSVGContainer.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 169 matching lines @@
 
     for (LayoutObject* child = lastChild(); child; child = child->previousSibling()) {
         if (child->nodeAtFloatPoint(result, localPoint, hitTestAction)) {
             const LayoutPoint& localLayoutPoint = roundedLayoutPoint(localPoint);
             updateHitTestResult(result, localLayoutPoint);
             if (result.addNodeToListBasedTestResult(child->node(), localLayoutPoint) == StopHitTesting)
                 return true;
         }
     }
 
-    // pointer-events=boundingBox makes it possible for containers to be direct targets
+    // pointer-events: bounding-box makes it possible for containers to be direct targets.
     if (style()->pointerEvents() == PE_BOUNDINGBOX) {
-        ASSERT(isObjectBoundingBoxValid());
-        if (objectBoundingBox().contains(localPoint)) {
+        // Check for a valid bounding box because it will be invalid for empty containers.
+        if (isObjectBoundingBoxValid() && objectBoundingBox().contains(localPoint)) {
             const LayoutPoint& localLayoutPoint = roundedLayoutPoint(localPoint);
             updateHitTestResult(result, localLayoutPoint);
             if (result.addNodeToListBasedTestResult(element(), localLayoutPoint) == StopHitTesting)
                 return true;
         }
     }
     // 16.4: "If there are no graphics elements whose relevant graphics content is under the pointer (i.e., there is no target element), the event is not dispatched."
     return false;
 }
 
 SVGTransformChange LayoutSVGContainer::calculateLocalTransform()
 {
     return SVGTransformChange::None;
 }
 
 } // namespace blink