s := Sprintf(tt.fmt, tt.val)
		i := strings.Index(tt.out, "PTR")
		if i >= 0 && i < len(s) {
			var pattern, chars string
			switch {
			case strings.HasPrefix(tt.out[i:], "PTR_b"):
				pattern = "PTR_b"
				chars = "01"
			case strings.HasPrefix(tt.out[i:], "PTR_o"):
				pattern = "PTR_o"
				chars = "01234567"
			case strings.HasPrefix(tt.out[i:], "PTR_d"):
				pattern = "PTR_d"