http://play.golang.org/p/IxtYF1rXe9
-----
package main

type T struct {
    x int
    y string
}

func f() (*T, *T) {
    return &T{
            x: 1,
            y: "foo",
        }, &T{
            x: 2,
            y: "bar",
        }
}
-----

This doesn't happen when there's only one return value, or when one of the return values
is "nil".