树莓派安装opencv编译到100%出错

【树莓派安装opencv3.4.0+树莓派3b(11 bulleye)】请求各位帮忙帮帮忙解决! 在编译到100%时出现这个错误，搜遍全网找不到!

/home/pi/Downloads/opencv-3.4.0/modules/stitching/src/matchers.cpp:446:22: error: no match for ‘operator=’ (operand types are ‘cv::Ptrcv::Feature2D’ and ‘int’)
446 extractor_ = sextractor_;

复制报错代码和源码发给我