anchor.diff:              'Unable to read package config data from $packageConfigPath: $e');
         }
       } else if (options.packageRootPath != null) {
  -      packageMap = _PackageRootPackageMapBuilder
  -          .buildPackageMap(options.packageRootPath);
  +      packageMap = _PackageRootPackageMapBuilder.buildPackageMap(
  +          options.packageRootPath);
       } else {
         file_system.Resource cwd = resourceProvider.getResource('.');
         // Look for .packages.
  
positive.code:                   file.createSource(), content, analysisDriver.sourceFactory);
            formatter.formatErrors([new AnalysisErrorInfoImpl(errors, lineInfo)]);
            for (AnalysisError error in errors) {
              allResult = allResult.max(determineProcessedSeverity(
                  error, options, analysisDriver.analysisOptions));
            }
          } else if (shortName == AnalysisEngine.PUBSPEC_YAML_FILE) {
            try {
  
negative.code:               formatter
                    .formatErrors([new AnalysisErrorInfoImpl(errors, lineInfo)]);
                for (AnalysisError error in errors) {
                  ErrorSeverity severity = determineProcessedSeverity(
                      error, options, analysisDriver.analysisOptions);
                  allResult = allResult.max(severity);
                }
              }
            } catch (exception) {
  