ASSERTION FAILED: !m_overflow

third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp

Index: third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp b/third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp
index f8a1ff7b390bd7b6bc90ce37028970ef089888e0..e63f2e871ca6cd12b48d4e488d5d77b9afc79dd1 100644
--- a/third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp
+++ b/third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp
@@ -939,6 +939,7 @@ void InlineFlowBox::computeOverflow(LayoutUnit lineTop, LayoutUnit lineBottom, G
 
 void InlineFlowBox::setLayoutOverflow(const LayoutRect& rect, const LayoutRect& frameBox)
 {
+    ASSERT(!knownToHaveNoOverflow());
     if (frameBox.contains(rect) || rect.isEmpty())
         return;
 
@@ -950,6 +951,7 @@ void InlineFlowBox::setLayoutOverflow(const LayoutRect& rect, const LayoutRect&
 
 void InlineFlowBox::setVisualOverflow(const LayoutRect& rect, const LayoutRect& frameBox)
 {
+    ASSERT(!knownToHaveNoOverflow());
     if (frameBox.contains(rect) || rect.isEmpty())
         return;
 
@@ -961,6 +963,7 @@ void InlineFlowBox::setVisualOverflow(const LayoutRect& rect, const LayoutRect&
 
 void InlineFlowBox::setOverflowFromLogicalRects(const LayoutRect& logicalLayoutOverflow, const LayoutRect& logicalVisualOverflow, LayoutUnit lineTop, LayoutUnit lineBottom)
 {
+    ASSERT(!knownToHaveNoOverflow());
     LayoutRect frameBox = frameRectIncludingLineHeight(lineTop, lineBottom);
 
     LayoutRect layoutOverflow(isHorizontal() ? logicalLayoutOverflow : logicalLayoutOverflow.transposedRect());