gistfile1.txt

<dgryski@kamek[w] \ʕ◔ϖ◔ʔ/ > cat main.go
package main

import (
	"fmt"
	"time"
)

func main() {

	x := []int{1, 2, 3}

	for i := range x {
		go func() {
			fmt.Println(i)
		}()
	}

	time.Sleep(2)

}
<dgryski@kamek[w] \ʕ◔ϖ◔ʔ/ > go vet main.go
main.go:14: range variable i captured by func literal
exit status 1