C++ code debug crash in unreal 4.18 source version

I downloaded source version from github, compiled the engine. Then I open the UE4editor.exe, created a sample c++ project and open the vs project, choose the solution “Debug Editor”, then I click menu of VS “Debug/Attach to Process”, I choosed the UE4editor process. At this point, the editor crash and I vs force to restart…

Is there any problem with my debug operation ? I really wanna debug my c++ code now, please help !