mgo int64 struct member unpacking

mgotest.go

package main

import (
	"fmt"
	"launchpad.net/mgo"
)

type MyStruct struct {
	A int64
	B int
	C string
}

func main() {
	sess, _ := mgo.Mongo("127.0.0.1")
	defer sess.Close()

	db := sess.DB("mgotest")
	col := db.C("structs")

	mys := MyStruct{
		A: 128,
		B: 2048,
		C: "test",
	}
	col.Insert(&mys)
	fmt.Printf("inserted: %#v\n", mys)

	retr := MyStruct{}
	err := col.Find(nil).One(&retr)
	if err != nil {
		fmt.Printf("error retrieving: %s\n", err.String())
		return
	}

	fmt.Printf("retrieved: %#v\n", retr)

}


/* Program Output:
inserted: main.MyStruct{A:128, B:2048, C:"test"}
error retrieving: reflect: reflect.Set: int64 != int

Mongo console:
> db.structs.find()
{ "_id" : ObjectId("4daf13550fc82231480fbeaf"), "a" : 128, "b" : 2048, "c" : "test" }
*/

My System: OS X 10.6.6, Go weekly.2011-04-13 8156, mgo r2011.04.19, mongo db version v1.8.0

Program Output:
inserted: main.MyStruct{A:128, B:2048, C:"test"}
error retrieving: reflect: reflect.Set: int64 != int

Mongo console:

db.structs.find()
{ "_id" : ObjectId("4daf13550fc82231480fbeaf"), "a" : 128, "b" : 2048, "c" : "test" }

Note: Changing MyStruct.A's type to int makes the program execute flawlessly.

problem solved: owner too stupid to install correct go weekly :/