diff -r 22b67b4cf067 -r 13bd3a8df334 jitcraft/Array.cpp
--- a/jitcraft/Array.cpp	Sat Jul 07 01:45:33 2012 -0400
+++ b/jitcraft/Array.cpp	Sat Jul 07 17:11:31 2012 -0700
@@ -45,19 +45,21 @@
     if (type->contained()->primitive() == PrimitiveType_Char)
         return sizeof(Array) + elements * sizeof(char);
     assert(type->contained()->isFloat());
-    return sizeof(Array) + elements * sizeof(float);
+    return elements * sizeof(float);
 }
 
 Array *
 Array::New(Zone *zone, Handle<ArrayMap> map, uint32 elements, Heap::Tenure tenure)
 {
-    size_t bytes = SizeFor(map->type(), elements);
+    size_t elementBytes = SizeFor(map->type(), elements);
+    size_t bytes = sizeof(Array) + elementBytes;
     Local<Array> array(zone, Array::cast(zone->allocate(map, bytes, tenure)));
     if (!array)
         return NULL;
 
     array->nelements_ = elements;
     array->elements_ = VoidPtr((Array *)array + 1);
+    memset(array->elements_, 0, elementBytes);
     return array;
 }