anchor.diff:      }
       _server.stdin.writeln(inputKey);
   
  -    return stdoutHandler.compilerOutput.future;
  +    return _stdoutHandler.compilerOutput.future;
     }
   
     Future<CompilerOutput> _compile(String scriptFilename, String outputPath,
  
positive.code:       .transform(utf8.decoder)
        .transform(const LineSplitter())
        .listen(
          stdoutHandler.handler,
          onDone: () {
            // when outputFilename future is not completed, but stdout is closed
            // process has died unexpectedly.
            if (!stdoutHandler.compilerOutput.isCompleted) {
              stdoutHandler.compilerOutput.complete(null);
            }
          });
  
  
negative.code:   final String _fileSystemScheme;
    String _sdkRoot;
    Process _server;
    final _StdoutHandler _stdoutHandler;
  
    /// If invoked for the first time, it compiles Dart script identified by
    /// [mainPath], [invalidatedFiles] list is ignored.
  