anchor.diff:        "vmOptions": result,
         "sharedOptions": sharedOptions ?? [],
         "dartOptions": dartOptions,
  +      "environment": environment,
         "packageRoot": packageRoot,
         "packages": packages,
         "hasSyntaxError": hasSyntaxError,
  
positive.code:     RegExp testOptionsRegExp = new RegExp(r"// VMOptions=(.*)");
      RegExp sharedOptionsRegExp = new RegExp(r"// SharedOptions=(.*)");
      RegExp dartOptionsRegExp = new RegExp(r"// DartOptions=(.*)");
      RegExp otherScriptsRegExp = new RegExp(r"// OtherScripts=(.*)");
      RegExp otherResourcesRegExp = new RegExp(r"// OtherResources=(.*)");
      RegExp packageRootRegExp = new RegExp(r"// PackageRoot=(.*)");
  
negative.code:     var result = <List<String>>[];
      List<String> dartOptions;
      List<String> sharedOptions;
      Map<String, String> environment;
      String packageRoot;
      String packages;
  
  