C:\build\precommit_windows64\4.x\opencv\modules\imgproc\src\demosaicing.cpp(683): warning C4101: 'vecOp': unreferenced local variable [C:\build\precommit_windows64\build\modules\imgproc\opencv_imgproc.vcxproj]
  C:\build\precommit_windows64\4.x\opencv\modules\imgproc\src\demosaicing.cpp(682): note: while compiling class template member function 'void cv::Bayer2Gray_Invoker<T,SIMDInterpolator>::operator ()(const cv::Range &) const'
          with
          [
              T=uchar,
              SIMDInterpolator=cv::SIMDBayerInterpolator_8u
          ]
  C:\build\precommit_windows64\4.x\opencv\modules\imgproc\src\demosaicing.cpp(793): note: see reference to class template instantiation 'cv::Bayer2Gray_Invoker<T,SIMDInterpolator>' being compiled
          with
          [
              T=uchar,
              SIMDInterpolator=cv::SIMDBayerInterpolator_8u
          ]
  C:\build\precommit_windows64\4.x\opencv\modules\imgproc\src\demosaicing.cpp(1779): note: see reference to function template instantiation 'void cv::Bayer2Gray_<uchar,cv::SIMDBayerInterpolator_8u>(const cv::Mat &,cv::Mat &,int)' being compiled