by borman@google.com:

Go version: import 8906cf341c9b (2012-01-07)

The following code panics, it should return an error.

package main
import (
    "fmt"
    "encoding/json"
)

type errorMessage struct {
        Message string `json:"message"`
        Success bool   `json:"success"`
        Error   string `json:"data"`
}

var input = `{
  "data": {
    "user": "name"
  }, 
  "message": "Success", 
  "success": true
}`

func main() {
    data := []byte(input)
    em := errorMessage{}
    fmt.Println(json.Unmarshal(data, &em))
}