see https://github.com/krb5/krb5/commit/259668e4970e05226efa1807303d3adfbb35df4a.


> -----Original Messages-----
> From: "Greg Hudson via RT" <rt-comment@krbdev.mit.edu>
> Sent Time: 2018-09-19 01:21:48 (Wednesday)
> To: xiaoyang@iie.ac.cn
> Cc: 
> Subject: [krbdev.mit.edu #8740] Null pointer deference in function CLeashApp :: GetProfileFile in src/windows/leash/Leash.cpp
> 
> krb5_get_default_config_files() never yields an empty list if it 
> returns successfully, so I don't think this is a bug.