}},
		{`package p6; func _() { { var x int; _ = x } }`, []string{
			"file:", "func:", "block:x",
		}},
		{`package p7; func _() { if true {} }`, []string{
			"file:", "func:", "if:", "block:",
		}},
		{`package p8; func _() { if x := 0; x < 0 { y := x; _ = y } }`, []string{
			"file:", "func:", "if:x", "block:y",
		}},
		{`package p9; func _() { switch x := 0; x {} }`, []string{