--- a/src/luan/interp/Closure.java	Fri Feb 15 04:52:16 2013 +0000
+++ b/src/luan/interp/Closure.java	Fri Feb 15 09:55:17 2013 +0000
@@ -4,9 +4,11 @@
 import luan.LuanState;
 import luan.LuanElement;
 import luan.LuanException;
+import luan.DeepCloner;
+import luan.DeepCloneable;
 
 
-final class Closure extends LuanFunction {
+final class Closure extends LuanFunction implements DeepCloneable<Closure> {
 	private final Chunk chunk;
 	final UpValue[] upValues;
 	private final static UpValue[] NO_UP_VALUES = new UpValue[0];
@@ -24,6 +26,19 @@
 		}
 	}
 
+	private Closure(Closure c) {
+		this.chunk = c.chunk;
+		this.upValues = c.upValues==NO_UP_VALUES ? NO_UP_VALUES : c.upValues.clone();
+	}
+
+	@Override public Closure shallowClone() {
+		return new Closure(this);
+	}
+
+	@Override public void deepenClone(Closure clone,DeepCloner cloner) {
+		cloner.deepenClone(clone.upValues);
+	}
+
 	public Object[] call(LuanState luan,Object[] args) throws LuanException {
 		return call(this,(LuanStateImpl)luan,args);
 	}