diff -r dc7d3b7a918c -r 9c544823d090 src/BytecodeCompiler.cpp
--- a/src/BytecodeCompiler.cpp	Sat Aug 04 17:51:43 2012 -0700
+++ b/src/BytecodeCompiler.cpp	Sat Aug 04 19:33:06 2012 -0700
@@ -758,12 +758,24 @@
             __ note_position(node->pos());
             __ arraycopy();
         }
+    } else if (type->isStruct()) {
+        Local<Map> map(zone_, type->newMap());
+        if (var->scope()->kind() == Scope::GLOBAL)
+            __ newstruct(map, Heap::Tenure_Old);
+        else if (var->needsHeapAllocation())
+            __ newstruct(map, Heap::Tenure_Default);
+        else
+            __ newstruct(map, Heap::Tenure_Stack);
     } else {
         if (node->initialization()) {
             node->initialization()->accept(this);
         } else {
-            if (!node->postDimensions())
+            if (type->isInt32OrEnum() || type->isBool()) {
                 __ int_(0);
+            } else {
+                assert(type->isFloat());
+                __ float_(0);
+            }
         }
     }