ASSERTION FAILED: object->style()->overflowX() == object->style()->overflowY()

Source/core/css/resolver/StyleAdjuster.cpp

Index: Source/core/css/resolver/StyleAdjuster.cpp
diff --git a/Source/core/css/resolver/StyleAdjuster.cpp b/Source/core/css/resolver/StyleAdjuster.cpp
index af6781c43bd74a6c12c5b9dd969821141eac7187..d83982e5538169dae5244286d250138da522756d 100644
--- a/Source/core/css/resolver/StyleAdjuster.cpp
+++ b/Source/core/css/resolver/StyleAdjuster.cpp
@@ -419,6 +419,14 @@ void StyleAdjuster::adjustOverflow(RenderStyle* style, Element* element)
             style->setOverflowX(OHIDDEN);
         else if (style->overflowX() == OAUTO)
             style->setOverflowX(OVISIBLE);
+
+        if (style->overflowX() == style->overflowY())
+            return;
+
+        if (style->overflowX() != OVISIBLE)
+            style->setOverflowX(OVISIBLE);
+        else
+            style->setOverflowY(OVISIBLE);
     }
 }