1 files changed, 10 insertions, 2 deletions
diff --git a/WebKit/chromium/public/WebVector.h b/WebKit/chromium/public/WebVector.h
index 0520895..cf3ec95 100644
--- a/WebKit/chromium/public/WebVector.h
+++ b/WebKit/chromium/public/WebVector.h
@@ -115,8 +115,16 @@ public:
     size_t size() const { return m_size; }
     bool isEmpty() const { return !m_size; }
 
-    T& operator[](size_t i) { return m_ptr[i]; }
-    const T& operator[](size_t i) const { return m_ptr[i]; }
+    T& operator[](size_t i)
+    {
+        WEBKIT_ASSERT(i < m_size);
+        return m_ptr[i];
+    }
+    const T& operator[](size_t i) const
+    {
+        WEBKIT_ASSERT(i < m_size);
+        return m_ptr[i];
+    }
 
     T* data() { return m_ptr; }
     const T* data() const { return m_ptr; }