func FooNx(x *int, vals ...*int) (s int) { // ERROR "leaking param: x" "leaking param content: vals"
	vals = append(vals, x)
	return FooN(vals...)
}

var sink []*int

func FooNy(x *int, vals ...*int) (s int) { // ERROR "leaking param: x" "leaking param: vals"
	vals = append(vals, x)
	sink = vals
	return FooN(vals...)
}

func FooNz(vals ...*int) (s int) { // ERROR "leaking param: vals"