我有以下代码，但我无法弄清楚为什么错误： PANIC=runtime error: index out of range is happening
type Board struct {
Tboard [9]string
Player1 Player
Player2 Player
}
func makeBoard() *Board {
b := &Board{Tboard: [9]string{}}
for x := 0; x < len(b.Tboard); x++ {
b.Tboard[x] = E // E = "[ ]"
fmt.Println(b.Tboard[x])
}
fmt.Println(len(b.Tboard)) // => 9
fmt.Print("Error: ")
fmt.Println(b) // => Error: %!v(PANIC=runtime error: index out of range)
fmt.Println(b.Tboard) // => [[ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ]]
return b
}