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arrays - Strange golang "append" behavior (overwriting values in slice)

I have this simple code:

import "fmt"

type Foo struct {
    val int
}

func main() {
    var a = make([]*Foo, 1)
    a[0] = &Foo{0}

    var b = [3]Foo{Foo{1}, Foo{2}, Foo{3}}
    for _, e := range b {
        a = append(a, &e)
    }

    for _, e := range a {
        fmt.Printf("%v ", *e)
    }
}

I was expecting it to print {0} {1} {2} {3}, however it prints {0} {3} {3} {3}. What happened here?

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