第九章0.2执行出现Segmentation fault (core dumped)错误

在程序执行到string dataset_dir = myslam::Config::get ( "dataset_dir" );时出现Segmentation fault (core dumped)错误 Program received signal SIGSEGV, Segmentation fault. 0x00007ffff6bfc94a in cv::FileNode::ptr() [clone .localalias.329] () from /usr/local/lib/libopencv_core.so.4.1 (gdb) where #0 0x00007ffff6bfc94a in cv::FileNode::ptr() [clone .localalias.329] () from /usr/local/lib/libopencv_core.so.4.1 #1 0x00007ffff6bfca39 in cv::FileNode::type() const () from /usr/local/lib/libopencv_core.so.4.1 #2 0x00007ffff6bfca99 in cv::FileNode::isMap() const () from /usr/local/lib/libopencv_core.so.4.1 #3 0x00007ffff6c01db1 in cv::FileNode::operator[](std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&) const () from /usr/local/lib/libopencv_core.so.4.1 #4 0x00007ffff6c01f61 in cv::FileStorage::operator[](std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&) const () from /usr/local/lib/libopencv_core.so.4.1 #5 0x0000555555554fa9 in main () 怀疑和config.h里的模板get函数有关系，却不知道怎么解。请大神指教。