Golang closure not storing captured variables?

In this block of code below, I expect the output to be 0, 1, 2, 3,..., 9. However, only the output 10, 10,...,10 is produced.

package mainimport "fmt"func adder() []func() {    out := []func(){}    for i := 0; i < 10; i++ {        out = append(out, func() { fmt.Println(i) })    }    return out}func main() {    out := adder()    for i := 0; i < 10; i++ {        out[i]()    }}

My mental model suggests that a new function is generated and stored every time in the for-loop, but it doesn't seem to be the case. Is there a solution to generating new functions without modifying the signature (no parameters or global variables) but still keeping the current value of i?