Native c++ library symbol source not work on ProGet

[lmdu-gs]

Following the tutorials, I create a c++ library(log4cplus) packages, and push them to ProGet.
Both the main and redist packages work perfectly, But the symbol package not.
I can download the pdb file on VS2015, but can't step into the library functions.
After searching, I found that the symbol package's src directory created by CoApp is not correct with this document.

Depends on the document, the src directory should be "src/source file", not "src/native/source file"