anchor.diff:        _generator = generator != null
             ? generator
             : await IncrementalKernelGenerator.newInstance(
  -              compilerOptions, _filenameUri,
  +              compilerOptions, Uri.base.resolve(_filename),
                 useMinimalGenerator: true);
         final DeltaProgram deltaProgram =
             await _runWithPrintRedirection(() => _generator.computeDelta());
  
positive.code:   BinaryPrinterFactory printerFactory;
  
    IncrementalKernelGenerator _generator;
    String _kernelBinaryFilename;
  
    @override
  
negative.code:     ArgResults options, {
      IncrementalKernelGenerator generator,
    }) async {
      _filename = filename;
      _kernelBinaryFilename = "$filename.dill";
      final String boundaryKey = new Uuid().generateV4();
      _outputStream.writeln("result $boundaryKey");
  