diff -r d9df6d6cb927 -r c6bcb8859b93 core/src/luan/DeepCloneable.java
--- a/core/src/luan/DeepCloneable.java	Sat May 02 23:41:59 2015 -0600
+++ b/core/src/luan/DeepCloneable.java	Sun May 03 15:45:39 2015 -0600
@@ -1,7 +1,7 @@
 package luan;
 
 
-public interface DeepCloneable<T extends DeepCloneable> {
-	public T shallowClone();
-	public void deepenClone(T clone,DeepCloner cloner);
+public interface DeepCloneable {
+	public DeepCloneable shallowClone();
+	public void deepenClone(DeepCloneable clone,DeepCloner cloner);
 }

diff -r d9df6d6cb927 -r c6bcb8859b93 core/src/luan/DeepCloner.java
--- a/core/src/luan/DeepCloner.java	Sat May 02 23:41:59 2015 -0600
+++ b/core/src/luan/DeepCloner.java	Sun May 03 15:45:39 2015 -0600
@@ -1,17 +1,17 @@
 package luan;
 
 import java.util.Map;
+import java.util.HashMap;
 import java.util.IdentityHashMap;
 
 
 public final class DeepCloner {
-	private final Map<Object,Object> cloned = new IdentityHashMap<Object,Object>();
+	private final Map cloned = new IdentityHashMap();
 
-	public <T extends DeepCloneable<T>> T deepClone(T obj) {
+	public DeepCloneable deepClone(DeepCloneable obj) {
 		if( obj==null )
 			return null;
-		@SuppressWarnings("unchecked")
-		T rtn = (T)cloned.get(obj);
+		DeepCloneable rtn = (DeepCloneable)cloned.get(obj);
 		if( rtn == null ) {
 			rtn = obj.shallowClone();
 			cloned.put(obj,rtn);
@@ -20,28 +20,41 @@
 		return rtn;
 	}
 
-	public <T> T[] deepClone(T[] obj) {
+	public Object[] deepClone(Object[] obj) {
 		if( obj.length == 0 )
 			return obj;
-		@SuppressWarnings("unchecked")
-		T[] rtn = (T[])cloned.get(obj);
+		Object[] rtn = (Object[])cloned.get(obj);
 		if( rtn == null ) {
 			rtn = obj.clone();
 			cloned.put(obj,rtn);
 			for( int i=0; i<rtn.length; i++ ) {
-				@SuppressWarnings("unchecked")
-				T t = get(rtn[i]);
-				rtn[i] = t;
+				rtn[i] = get(rtn[i]);
 			}
 		}
 		return rtn;
 	}
 
-	public <T> T get(T obj) {
-		if( !(obj instanceof DeepCloneable) )
-			return obj;
-		@SuppressWarnings("unchecked")
-		T dc = (T)deepClone((DeepCloneable)obj);
-		return dc;
+	public Map deepClone(Map obj) {
+		if( !obj.getClass().equals(HashMap.class) )
+			throw new RuntimeException("can only clone HashMap");
+		Map rtn = (Map)cloned.get(obj);
+		if( rtn == null ) {
+			rtn = new HashMap();
+			for( Object stupid : obj.entrySet() ) {
+				Map.Entry entry = (Map.Entry)stupid;
+				rtn.put( get(entry.getKey()), get(entry.getValue()) );
+			}
+		}
+		return rtn;
+	}
+
+	public Object get(Object obj) {
+		if( obj instanceof DeepCloneable )
+			return deepClone((DeepCloneable)obj);
+		if( obj instanceof Object[] )
+			return deepClone((Object[])obj);
+		if( obj instanceof Map )
+			return deepClone((Map)obj);
+		return obj;
 	}
 }

diff -r d9df6d6cb927 -r c6bcb8859b93 core/src/luan/LuanState.java
--- a/core/src/luan/LuanState.java	Sat May 02 23:41:59 2015 -0600
+++ b/core/src/luan/LuanState.java	Sun May 03 15:45:39 2015 -0600
@@ -2,30 +2,32 @@
 
 import java.util.List;
 import java.util.ArrayList;
+import java.util.Map;
+import java.util.HashMap;
 import luan.impl.LuanCompiler;
 import luan.modules.BasicLuan;
 
 
-public abstract class LuanState implements DeepCloneable<LuanState> {
+public abstract class LuanState implements DeepCloneable {
 
 	final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>();
 
-	private LuanTable registry;
+	private Map registry;
 
 	protected LuanState() {
-		registry = new LuanTable();
+		registry = new HashMap();
 	}
 
 	protected LuanState(LuanState luan) {}
 
-	@Override public void deepenClone(LuanState clone,DeepCloner cloner) {
-		clone.registry = cloner.deepClone(registry);
+	@Override public void deepenClone(DeepCloneable clone,DeepCloner cloner) {
+		((LuanState)clone).registry = cloner.deepClone(registry);
 	}
 
 	public abstract LuanTable currentEnvironment();
 	public abstract LuanSource currentSource();
 
-	public final LuanTable registry() {
+	public final Map registry() {
 		return registry;
 	}
 

diff -r d9df6d6cb927 -r c6bcb8859b93 core/src/luan/LuanTable.java
--- a/core/src/luan/LuanTable.java	Sat May 02 23:41:59 2015 -0600
+++ b/core/src/luan/LuanTable.java	Sun May 03 15:45:39 2015 -0600
@@ -15,7 +15,7 @@
 import java.util.regex.Pattern;
 
 
-public final class LuanTable implements DeepCloneable<LuanTable> {
+public final class LuanTable implements DeepCloneable {
 	private Map<Object,Object> map = null;
 	private List<Object> list = null;
 	private LuanTable metatable = null;
@@ -60,7 +60,8 @@
 		return new LuanTable();
 	}
 
-	@Override public void deepenClone(LuanTable clone,DeepCloner cloner) {
+	@Override public void deepenClone(DeepCloneable dc,DeepCloner cloner) {
+		LuanTable clone = (LuanTable)dc;
 		if( map != null ) {
 			clone.map = newMap();
 			for( Map.Entry<Object,Object> entry : map.entrySet() ) {
@@ -74,7 +75,7 @@
 			}
 		}
 		if( metatable != null )
-			clone.metatable = cloner.get(metatable);
+			clone.metatable = (LuanTable)cloner.get(metatable);
 		clone.hasJava = hasJava;
 	}
 

diff -r d9df6d6cb927 -r c6bcb8859b93 core/src/luan/impl/Closure.java
--- a/core/src/luan/impl/Closure.java	Sat May 02 23:41:59 2015 -0600
+++ b/core/src/luan/impl/Closure.java	Sun May 03 15:45:39 2015 -0600
@@ -9,7 +9,7 @@
 import luan.DeepCloneable;
 
 
-final class Closure extends LuanFunction implements DeepCloneable<Closure> {
+final class Closure extends LuanFunction implements DeepCloneable {
 	final FnDef fnDef;
 	private UpValue[] upValues;
 
@@ -30,8 +30,8 @@
 		return new Closure(this);
 	}
 
-	@Override public void deepenClone(Closure clone,DeepCloner cloner) {
-		clone.upValues = cloner.deepClone(upValues);
+	@Override public void deepenClone(DeepCloneable clone,DeepCloner cloner) {
+		((Closure)clone).upValues = (UpValue[])cloner.deepClone(upValues);
 	}
 
 	UpValue[] upValues() {

diff -r d9df6d6cb927 -r c6bcb8859b93 core/src/luan/impl/UpValue.java
--- a/core/src/luan/impl/UpValue.java	Sat May 02 23:41:59 2015 -0600
+++ b/core/src/luan/impl/UpValue.java	Sun May 03 15:45:39 2015 -0600
@@ -5,7 +5,7 @@
 import luan.LuanException;
 
 
-final class UpValue implements DeepCloneable<UpValue> {
+final class UpValue implements DeepCloneable {
 	private Object[] stack;
 	private int index;
 	private boolean isClosed = false;
@@ -27,7 +27,8 @@
 		return new UpValue();
 	}
 
-	@Override public void deepenClone(UpValue clone,DeepCloner cloner) {
+	@Override public void deepenClone(DeepCloneable dc,DeepCloner cloner) {
+		UpValue clone = (UpValue)dc;
 		clone.isClosed = isClosed;
 		if( isClosed ) {
 			clone.value = cloner.get(value);

diff -r d9df6d6cb927 -r c6bcb8859b93 core/src/luan/modules/IoLuan.java
--- a/core/src/luan/modules/IoLuan.java	Sat May 02 23:41:59 2015 -0600
+++ b/core/src/luan/modules/IoLuan.java	Sun May 03 15:45:39 2015 -0600
@@ -679,13 +679,13 @@
 	private static String SECURITY_KEY = "Io.Security";
 
 	private static void check(LuanState luan,String name) throws LuanException {
-		Security s = (Security)luan.registry().rawGet(SECURITY_KEY);
+		Security s = (Security)luan.registry().get(SECURITY_KEY);
 		if( s!=null )
 			s.check(luan,name);
 	}
 
 	public static void setSecurity(LuanState luan,Security s) {
-		luan.registry().rawPut(SECURITY_KEY,s);
+		luan.registry().put(SECURITY_KEY,s);
 	}
 
 	private void IoLuan() {}  // never

diff -r d9df6d6cb927 -r c6bcb8859b93 core/src/luan/modules/JavaLuan.java
--- a/core/src/luan/modules/JavaLuan.java	Sat May 02 23:41:59 2015 -0600
+++ b/core/src/luan/modules/JavaLuan.java	Sun May 03 15:45:39 2015 -0600
@@ -465,13 +465,13 @@
 	private static String SECURITY_KEY = "Java.Security";
 
 	private static void check(LuanState luan,String name) throws LuanException {
-		Security s = (Security)luan.registry().rawGet(SECURITY_KEY);
+		Security s = (Security)luan.registry().get(SECURITY_KEY);
 		if( s!=null )
 			s.check(luan,name);
 	}
 
 	public static void setSecurity(LuanState luan,Security s) {
-		luan.registry().rawPut(SECURITY_KEY,s);
+		luan.registry().put(SECURITY_KEY,s);
 	}
 
 }

diff -r d9df6d6cb927 -r c6bcb8859b93 core/src/luan/modules/PackageLuan.java
--- a/core/src/luan/modules/PackageLuan.java	Sat May 02 23:41:59 2015 -0600
+++ b/core/src/luan/modules/PackageLuan.java	Sun May 03 15:45:39 2015 -0600
@@ -24,10 +24,10 @@
 	}
 
 	public static LuanTable loaded(LuanState luan) {
-		LuanTable tbl = (LuanTable)luan.registry().rawGet("Package.loaded");
+		LuanTable tbl = (LuanTable)luan.registry().get("Package.loaded");
 		if( tbl == null ) {
 			tbl = new LuanTable();
-			luan.registry().rawPut("Package.loaded",tbl);
+			luan.registry().put("Package.loaded",tbl);
 		}
 		return tbl;
 	}

diff -r d9df6d6cb927 -r c6bcb8859b93 core/src/luan/modules/ThreadLuan.java
--- a/core/src/luan/modules/ThreadLuan.java	Sat May 02 23:41:59 2015 -0600
+++ b/core/src/luan/modules/ThreadLuan.java	Sun May 03 15:45:39 2015 -0600
@@ -15,8 +15,8 @@
 
 	public static void fork(LuanState luan,LuanFunction fn,Object... args) {
 		DeepCloner cloner = new DeepCloner();
-		final LuanState newLuan = cloner.deepClone(luan);
-		final LuanFunction newFn = cloner.get(fn);
+		final LuanState newLuan = (LuanState)cloner.deepClone(luan);
+		final LuanFunction newFn = (LuanFunction)cloner.get(fn);
 		final Object[] newArgs = cloner.deepClone(args);
 		exec.execute(new Runnable(){public void run() {
 			try {

diff -r d9df6d6cb927 -r c6bcb8859b93 web/src/luan/modules/web/HttpServicer.java
--- a/web/src/luan/modules/web/HttpServicer.java	Sat May 02 23:41:59 2015 -0600
+++ b/web/src/luan/modules/web/HttpServicer.java	Sun May 03 15:45:39 2015 -0600
@@ -58,7 +58,7 @@
 					luan = sessionLuan;
 				} else {
 					DeepCloner cloner = new DeepCloner();
-					luan = cloner.deepClone(luan);
+					luan = (LuanState)cloner.deepClone(luan);
 					session.putValue("luan",luan);
 				}
 				tbl = (LuanTable)PackageLuan.require(luan,modName);
@@ -66,8 +66,8 @@
 			} else {
 				fn = getService(luan,tbl);
 				DeepCloner cloner = new DeepCloner();
-				luan = cloner.deepClone(luan);
-				fn = cloner.get(fn);
+				luan = (LuanState)cloner.deepClone(luan);
+				fn = (LuanFunction)cloner.get(fn);
 			}
 		}