tracking and tracing

src/main/java/carpet/script/value/GlobalValue.java

@@ -1,6 +1,6 @@
 package carpet.script.value;
 
-import carpet.script.value.Value;
+import carpet.script.exception.InternalExpressionException;
 
 public class GlobalValue extends Value
 {
@@ -21,4 +21,10 @@ public class GlobalValue extends Value
     {
         return false;
     }
+
+    @Override
+    public String getTypeString()
+    {
+        throw new InternalExpressionException("How did you get here? Cannot get type of an internal struct.");
+    }
 }