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 6d4402024b28115c447308ed9b1c24f28ae5c18e..21300bbdf2fdb3e957e0b46ce7da0b647b37f221 100644
--- a/third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp
+++ b/third_party/WebKit/Source/core/layout/line/InlineFlowBox.cpp
@@ -940,6 +940,7 @@ 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;
 
@@ -951,6 +952,7 @@ 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;
 
@@ -962,6 +964,7 @@ 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());