error: ISO C++ forbids declaration of ‘type name’ with no type [-fpermissive] Eigen::Map<const g2o::Vector7d> v(m); [closed]

edit

when compiling LSD-slam on my laptop, I received these unexpected errors

Actually, the source is coming from the part of an open source project I try to rerun. I did it before several days ago. However, I encounter this problem yesterday. here are my steps as below

cd catkin_ws
catkin_make

    GlobalMapping/g2oTypeSim3Sophus.h:96:20: error: ISO C++ forbids declaration of ‘type name’ with no type [-fpermissive]
       Eigen::Map<const g2o::Vector7d> v(m);
                        ^~~
    /home/htf/catkin_ws/src/third_parties/lsd_slam/lsd_slam_core/src/GlobalMapping/g2oTypeSim3Sophus.h:96:33: error: template argument 1 is invalid
       Eigen::Map<const g2o::Vector7d> v(m);
                                     ^
    /home/htf/catkin_ws/src/third_parties/lsd_slam/lsd_slam_core/src/GlobalMapping/g2oTypeSim3Sophus.h:96:38: error: invalid conversion from ‘const double*’ to ‘int’ [-fpermissive]
       Eigen::Map<const g2o::Vector7d> v(m);
                                          ^
    /home/htf/catkin_ws/src/third_parties/lsd_slam/lsd_slam_core/src/GlobalMapping/g2oTypeSim3Sophus.h:97:38: error: no matching function for call to ‘Sophus::Sim3Group<double>::exp(int&)’
     setMeasurement(Sophus::Sim3d::exp(v));

does anyone has encountered this problem? hope to get some clues, Thank you in advance.