anchor.diff:    }
   
     void _writeBenchmark(Stopwatch stopwatch, int errorCount) {
  -    String benchmarkOut = argResults['benchmark-out'];
  +    final String benchmarkOut = 'analysis_benchmark.json';
       String expectedTime = argResults['benchmark-expected'];
   
       Map<String, dynamic> data = <String, dynamic>{
  
positive.code:   Stopwatch analysisTimer;
    int lastErrorCount = 0;
  
    void _handleAnalysisStatus(bool isAnalyzing) {
      if (isAnalyzing) {
        if (firstAnalysis) {
          printStatus('Analyzing ${path.basename(Directory.current.path)}...');
  
negative.code:     return true;
    }
  
    bool get _isBenchmarking => argResults['benchmark'];
  
    Future<int> _analyzeOnce() async {
      Stopwatch stopwatch = new Stopwatch()..start();
  