Version 3.0.9...

src/objects-debug.cc

Index: src/objects-debug.cc
===================================================================
--- src/objects-debug.cc	(revision 6384)
+++ src/objects-debug.cc	(working copy)
@@ -670,17 +670,18 @@
 
   int finger = Smi::cast(get(kFingerIndex))->value();
   ASSERT(kEntriesIndex <= finger);
-  ASSERT(finger < size || finger == kEntriesIndex);
+  ASSERT((finger < size) || (finger == kEntriesIndex && finger == size));
   ASSERT_EQ(0, finger % kEntrySize);
 
   if (FLAG_enable_slow_asserts) {
-    STATIC_ASSERT(2 == kEntrySize);
-    for (int i = kEntriesIndex; i < length(); i += kEntrySize) {
+    for (int i = kEntriesIndex; i < size; i++) {
+      ASSERT(!get(i)->IsTheHole());
       get(i)->Verify();
-      get(i + 1)->Verify();
-      // Key and value must be either both the holes, or not.
-      ASSERT(get(i)->IsTheHole() == get(i + 1)->IsTheHole());
     }
+    for (int i = size; i < length(); i++) {
+      ASSERT(get(i)->IsTheHole());
+      get(i)->Verify();
+    }
   }
 }