Golang - Knuth-Durstenfeld Shuffle with crypto/rand

package main

import (
	"crypto/rand"
	"fmt"
	"math/big"
)

func shuffle(array []int) {
	for i := len(array) - 1; i >= 0; i-- {
		result, err := rand.Int(rand.Reader, big.NewInt(int64(i+1)))

		if err != nil {
			panic(err)
		}

		j := int(result.Int64())

		array[i], array[j] = array[j], array[i]
	}
}

func main() {
	a := []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
	fmt.Println(a)
	shuffle(a)
	fmt.Println(a)
}

[1 2 3 4 5 6 7 8 9 10]
[7 2 1 10 3 8 9 6 5 4]

[1 2 3 4 5 6 7 8 9 10]
[9 2 1 5 3 10 7 4 6 8]

[1 2 3 4 5 6 7 8 9 10]
[8 1 6 7 2 3 10 9 4 5]