"file:", "func:n", "for:i", "block:",
		}},
		{`package p19; func _(a []int) { for i := range a { _ = i} }`, []string{
			"file:", "func:a", "range:i", "block:",
		}},
		{`package p20; var s int; func _(a []int) { for i, x := range a { s += x; _ = i } }`, []string{
			"file:", "func:a", "range:i x", "block:",
		}},
	}

	for _, test := range tests {
		info := Info{Scopes: make(map[ast.Node]*Scope)}