anchor.diff:          try {
               final uri = Uri.parse(config);
               hub.commands.loadScriptFromUrl(uri);
  -            //hub.commands.loadScriptFromString(demo);
           } catch (e) {
               Hub.error("Top-level exception caught", object: e);
           }
  
positive.code: 
  import 'dart:core';
  import 'dart:html';
  import 'rialto.dart';
  
  final Map tests = {
  
negative.code: 
  
  void main() {
  
      // TODO: addErrorListener not yet implemented in Dart SDK...
      //ReceivePort errPort = new ReceivePort();
      //Isolate.current.addErrorListener(errPort.sendPort);
      //errPort.listen((d) => log("bonk: $d"));
  
      String config;
  
      // The Rules:
  