diff --git a/src/main/java/net/hollowcube/luau/LuaStateImpl.java b/src/main/java/net/hollowcube/luau/LuaStateImpl.java
index 68447fe..88374f0 100644
--- a/src/main/java/net/hollowcube/luau/LuaStateImpl.java
+++ b/src/main/java/net/hollowcube/luau/LuaStateImpl.java
@@ -856,10 +856,8 @@ public boolean newMetaTable(@NotNull String typeName) {
 
     @Override
     public void getMetaTable(@NotNull String typeName) {
-        try (Arena arena = Arena.ofConfined()) {
-            final LuaType type = getField(LUA_REGISTRYINDEX(), typeName);
-            assert type == LuaType.TABLE : "expected table";
-        }
+        final LuaType type = getField(LUA_REGISTRYINDEX(), typeName);
+        assert type == LuaType.TABLE : "expected table";
     }
 
     @Override
diff --git a/src/main/java/net/hollowcube/luau/LuaType.java b/src/main/java/net/hollowcube/luau/LuaType.java
index 713a856..bfdcfd5 100644
--- a/src/main/java/net/hollowcube/luau/LuaType.java
+++ b/src/main/java/net/hollowcube/luau/LuaType.java
@@ -27,7 +27,7 @@ public enum LuaType {
     private static final LuaType[] VALUES = values();
 
     public static @NotNull LuaType byId(int id) {
-        return id >= 0 && id < VALUES.length ? VALUES[id] : NONE;
+        return id >= 0 && id < VALUES.length ? VALUES[id + 1] : NONE;
     }
 
     public int id() {