t.Errorf("expected overflow scanning %q", test.text)
			continue
		}
		if !re.MatchString(err.Error()) {
			t.Errorf("expected overflow error scanning %q: %s", test.text, err)
		}
	}
}

func verifyNaN(str string, t *testing.T) {
	var f float64
	var f32 float32
	var f64 float64
	text := str + " " + str + " " + str
	n, err := Fscan(strings.NewReader(text), &f, &f32, &f64)
	if err != nil {