go 1.3.1
http://play.golang.org/p/TgUG4cii2o

1. To prevent type error, is it possible add a check about this

func main() {
    fruits := []string{"peach", "banana", "kiwi"}
    fruits2 := make([]string, len(fruits))
    copy(fruits2, fruits)
    
    fmt.Println(fruits)  // here is a type error, should be 2
    fmt.Println("Origin:", fruits)
}

What happened?

What should have happened instead?

fruits2 declared(or assigned) and not used

Please provide any additional information below.