Remove libs dependency from PackageLib.

src/core/org/luaj/vm2/lib/Bit32Lib.java

@@ -71,7 +71,7 @@ public class Bit32Lib extends TwoArgFunction {
 			"arshift", "lrotate", "lshift", "rrotate", "rshift"
 		});
 		env.set("bit32", t);
-		env.get("package").get("loaded").set("bit32", t);
+		if (!env.get("package").isnil()) env.get("package").get("loaded").set("bit32", t);
 		return t;
 	}
 

src/core/org/luaj/vm2/lib/CoroutineLib.java

@@ -82,7 +82,7 @@ public class CoroutineLib extends TwoArgFunction {
 		coroutine.set("yield", new yield());
 		coroutine.set("wrap", new wrap());
 		env.set("coroutine", coroutine);
-		env.get("package").get("loaded").set("coroutine", coroutine);
+		if (!env.get("package").isnil()) env.get("package").get("loaded").set("coroutine", coroutine);
 		return coroutine;
 	}
 

src/core/org/luaj/vm2/lib/DebugLib.java

@@ -135,7 +135,7 @@ public class DebugLib extends TwoArgFunction {
 		debug.set("upvalueid", new upvalueid());
 		debug.set("upvaluejoin", new upvaluejoin());
 		env.set("debug", debug);
-		env.get("package").get("loaded").set("debug", debug);
+		if (!env.get("package").isnil()) env.get("package").get("loaded").set("debug", debug);
 		return debug;
 	}
 

src/core/org/luaj/vm2/lib/IoLib.java

@@ -256,7 +256,7 @@ public class IoLib extends TwoArgFunction {
 		
 		// return the table
 		env.set("io", t);
-		env.get("package").get("loaded").set("io", t);
+		if (!env.get("package").isnil()) env.get("package").get("loaded").set("io", t);
 		return t;
 	}
 

src/core/org/luaj/vm2/lib/MathLib.java

@@ -125,7 +125,7 @@ public class MathLib extends TwoArgFunction {
 		math.set("sqrt", new sqrt());
 		math.set("tan", new tan());
 		env.set("math", math);
-		env.get("package").get("loaded").set("math", math);
+		if (!env.get("package").isnil()) env.get("package").get("loaded").set("math", math);
 		return math;
 	}
 	

src/core/org/luaj/vm2/lib/OsLib.java

@@ -132,7 +132,7 @@ public class OsLib extends TwoArgFunction {
 		for (int i = 0; i < NAMES.length; ++i)
 			os.set(NAMES[i], new OsLibFunc(i, NAMES[i]));
 		env.set("os", os);
-		env.get("package").get("loaded").set("os", os);
+		if (!env.get("package").isnil()) env.get("package").get("loaded").set("os", os);
 		return os;
 	}
 

src/core/org/luaj/vm2/lib/StringLib.java

@@ -24,8 +24,8 @@ package org.luaj.vm2.lib;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 
-import org.luaj.vm2.LuaClosure;
 import org.luaj.vm2.Buffer;
+import org.luaj.vm2.LuaClosure;
 import org.luaj.vm2.LuaString;
 import org.luaj.vm2.LuaTable;
 import org.luaj.vm2.LuaValue;
@@ -99,7 +99,7 @@ public class StringLib extends TwoArgFunction {
 		string.set("upper", new upper());
 		
 		env.set("string", string);
-		env.get("package").get("loaded").set("string", string);
+		if (!env.get("package").isnil()) env.get("package").get("loaded").set("string", string);
 		if (LuaString.s_metatable == null) {
 			LuaString.s_metatable = LuaValue.tableOf(new LuaValue[] { INDEX, string });
 		}

src/core/org/luaj/vm2/lib/TableLib.java

@@ -70,7 +70,7 @@ public class TableLib extends TwoArgFunction {
 		table.set("sort", new sort());
 		table.set("unpack", new unpack());
 		env.set("table", table);
-		env.get("package").get("loaded").set("table", table);
+		if (!env.get("package").isnil()) env.get("package").get("loaded").set("table", table);
 		return NIL;
 	}
 

src/jse/org/luaj/vm2/lib/jse/LuajavaLib.java

@@ -112,7 +112,7 @@ public class LuajavaLib extends VarArgFunction {
 				LuaTable t = new LuaTable();
 				bind( t, this.getClass(), NAMES, BINDCLASS );
 				env.set("luajava", t);
-				env.get("package").get("loaded").set("luajava", t);
+				if (!env.get("package").isnil()) env.get("package").get("loaded").set("luajava", t);
 				return t;
 			}
 			case BINDCLASS: {