anchor.diff:  
       return {
         "vmOptions": <List>[[]],
  +      "sharedOptions": <String>[],
         "dartOptions": null,
         "packageRoot": null,
         "hasCompileError": hasCompileError,
  
positive.code:       return readOptionsFromCo19File(filePath);
      }
      RegExp testOptionsRegExp = new RegExp(r"// VMOptions=(.*)");
      RegExp dartOptionsRegExp = new RegExp(r"// DartOptions=(.*)");
      RegExp otherScriptsRegExp = new RegExp(r"// OtherScripts=(.*)");
      RegExp packageRootRegExp = new RegExp(r"// PackageRoot=(.*)");
  
negative.code:     }
  
      return { "vmOptions": result,
               "sharedOptions": sharedOptions == null ? [] : sharedOptions,
               "dartOptions": dartOptions,
               "packageRoot": packageRoot,
               "hasCompileError": false,
  