无法使Gocode正常工作

Question

Hi I was try trying play around with gocode tool but since it has poor documentation I cannot figure out how it works. I've read

https://github.com/nsf/gocode/blob/master/docs/IDE_integration.md

I created a simple test file (path is d:\papa\papa.go):

package main

import (
    "fmt"
)
func main() {
    fmt.
}

It seems obvious that I want to get compilation for the fmt. part (to see functions and everything else exported from that package. Now I run

gocode -s -debug

And than

gocode -in=d:/papa/main.go -f=nice autocomplete 51

Here is gocode's output:

Found 2 candidates:
  func main()
  package fmt

It is not what I'd expect as you can see.

In the debug output I seen something interesting:

2017/04/10 15:58:15 Go project path: .

2017/04/10 15:58:15 Got autocompletion request for 'd:/papa/main.go'

2017/04/10 15:58:15 Cursor at: 51

2017/04/10 15:58:15

---

package main

import (

    "fmt"

)

# func main() {

    fmt.

}

---

2017/04/10 15:58:15 Found "fmt" at "D:\Go\pkg\windows_386\fmt.a"

2017/04/10 15:58:15 Error parsing input file (inner block):

2017/04/10 15:58:15 4:1: expected selector or type assertion, found '}'

2017/04/10 15:58:15 4:2: expected ';', found 'EOF'

2017/04/10 15:58:15 4:2: expected '}', found 'EOF'

2017/04/10 15:58:15 Offset: 0

2017/04/10 15:58:15 Number of candidates found: 2

2017/04/10 15:58:15 Candidates are:

2017/04/10 15:58:15 func main()

2017/04/10 15:58:15 package fmt

Needless to say there is no actual error during go build on this code.

So

1. Why gocode doesn't provide with the relevant info?

2. What is the deal about those "errors")?