Error when no payload

[back2arie]

My config.json:

{
  "headers": {
      "Content-Type": "application/json"
  }
}

Run:
$ gubrak -m get -r 10 -c config.json -u "http://localhost/"

Output:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0xf8 pc=0x1283163]

goroutine 1 [running]:
github.com/Bhinneka/gubrak.Scan(0xc000082300, 0xc00000e038, 0xc0000184a4, 0x3, 0x7ffeefbffa0e, 0x23, 0x0, 0x0, 0xc00008ee10, 0xa)
	/Users/wurianto/Documents/github/gubrak/worker.go:29 +0x123
github.com/Bhinneka/gubrak.(*Gubrak).Run(0xc00000c420)
	/Users/wurianto/Documents/github/gubrak/gubrak.go:64 +0x1b1
main.main()
	/Users/wurianto/Documents/github/gubrak/cmd/gubrak/main.go:33 +0x248