--- a/core/src/luan/impl/LuanStateImpl.java	Wed Jul 02 03:27:35 2014 +0000
+++ b/core/src/luan/impl/LuanStateImpl.java	Wed Jul 02 04:52:25 2014 +0000
@@ -57,7 +57,6 @@
 	private Frame frame = null;
 	Object returnValues;
 	Closure tailFn;
-	Map<UpValue.EnvGetter,UpValue> envs = new HashMap<UpValue.EnvGetter,UpValue>();
 
 	LuanStateImpl() {}
 
@@ -71,15 +70,6 @@
 		return new LuanStateImpl(this);
 	}
 
-	@Override public void deepenClone(LuanState clone,DeepCloner cloner) {
-		super.deepenClone(clone,cloner);
-		LuanStateImpl cloneImpl = (LuanStateImpl)clone;
-		cloneImpl.envs = new HashMap<UpValue.EnvGetter,UpValue>();
-		for( Map.Entry<UpValue.EnvGetter,UpValue> entry : envs.entrySet() ) {
-			cloneImpl.envs.put( entry.getKey(), cloner.deepClone(entry.getValue()) );
-		}
-	}
-
 	// returns stack
 	Object[] newFrame(Closure closure, int stackSize, Object[] varArgs) {
 		returnValues = LuanFunction.NOTHING;
@@ -118,16 +108,6 @@
 		return frame.getUpValue(index);
 	}
 
-	UpValue getUpValue(UpValue.EnvGetter getter) throws LuanException {
-		UpValue uv = envs.get(getter);
-		if( uv == null ) {
-			LuanTable env = new LuanTable();
-			uv = new UpValue(env);
-			envs.put(getter,uv);
-		}
-		return uv;
-	}
-
 	@Override public LuanTable currentEnvironment() {
 		if( frame==null )
 			return null;