Not work, i don't known why

[consolexinhun]

Finished  <<< greeter                [ 6.9 seconds ]                                                                                                                                               
[build] Summary: All 1 packages succeeded!                                                                                                                                                         
[build]   Ignored:   None.                                                                                                                                                                         
[build]   Warnings:  1 packages succeeded with warnings.                                                                                                                                           
[build]   Abandoned: None.                                                                                                                                                                         
[build]   Failed:    None.                                                                                                                                                                         
[build] Runtime: 7.0 seconds total.                                                                                                                                                                
consolexin@ubuntu:~/main/greeter$ source devel/setup.bash
consolexin@ubuntu:~/main/greeter$ rosrun greeter find: File system loop detected; ‘/home/consolexin/main/greeter/./build/greeter/grpc_protoc_root/greeter’ is part of the same file system loop as ‘/home/consolexin/main/greeter/.’.
find: File system loop detected; ‘/home/consolexin/main/greeter/./build/greeter/grpc_protoc_root/greeter’ is part of the same file system loop as ‘/home/consolexin/main/greeter/.’.

env.sh                 greeter_cc_client      greeter_cc_server      libhello_msg_proto.so  libhello_proto.so      _setup_util.py         
consolexin@ubuntu:~/main/greeter$ rosrun greeter greeter_cc_server
find: File system loop detected; ‘/home/consolexin/main/greeter/./build/greeter/grpc_protoc_root/greeter’ is part of the same file system loop as ‘/home/consolexin/main/greeter/.’.
find: File system loop detected; ‘/home/consolexin/main/greeter/./build/greeter/grpc_protoc_root/greeter’ is part of the same file system loop as ‘/home/consolexin/main/greeter/.’.

^C
consolexin@ubuntu:~/main/greeter$ rosrun greeter greeter_cc_server