panic to run wit without any parameter or just -h

[sadeqn]

as you can see, try to run with using -h make panic and exit! same result when try to run without any argument!

➜  wit git:(master) sudo ./wit -h    
2019/01/20 13:13:22 No cert dir specified! making `cert` dir and key and cert file!
2019/01/20 13:13:22 `server.key` or `server.cert` is not present in cert dir!
2019/01/20 13:13:23 wrote server.crt
2019/01/20 13:13:23 wrote server.key
**panic:** could not build arguments for function "main".main.func1 (/home/sadeq/golang/src/github.com/hbahadorzadeh/wit/wit.go:51): failed to build *service.WebService: could not build arguments for function "main".BuildContainer.func4 (/home/sadeq/golang/src/github.com/hbahadorzadeh/wit/wit.go:34): failed to build *ipset.IPSet: missing dependencies for function "main".BuildContainer.func3 (/home/sadeq/golang/src/github.com/hbahadorzadeh/wit/wit.go:29): type service.IpTables is not in the container, did you mean to use *service.IpTables?

goroutine 1 [running]:
main.main()
	/home/sadeq/golang/src/github.com/hbahadorzadeh/wit/wit.go:56 +0x1ff
➜  wit git:(master)