anchor.diff:    // TODO(rnystrom): Running the analyzer command line each time is very slow.
     // Either import the analyzer as a library, or at least invoke it in a batch
     // mode.
  -  var result = await Process.run(
  -      Platform.isWindows
  -          ? "sdk\\bin\\dartanalyzer.bat"
  -          : "sdk/bin/dartanalyzer",
  -      [
  -        ...options,
  -        "--format=machine",
  -        path,
  -      ]);
  +  var result = await Process.run(_analyzerPath, [
  +    ...options,
  +    "--format=machine",
  +    path,
  +  ]);
   
     // Analyzer returns 3 when it detects errors, 2 when it detects
     // warnings and --fatal-warnings is enabled, 1 when it detects
  
positive.code:   FastaCommandOutput.parseErrors(result.stdout as String, errors);
    return errors;
  }
  
negative.code: 
  const _usage =
      "Usage: dart update_static_error_tests.dart [flags...] <path glob>";
  
  final String _analyzerPath = _findAnalyzer();
  
  Future<void> main(List<String> args) async {
    var sources = ErrorSource.all.map((e) => e.marker).toList();
  