"I4======",
			"N4======",
		}, "illegal base32 data at input byte 0"},

		{[]string{
			"I4======",
			"========",
		}, "illegal base32 data at input byte 0"},

		{[]string{
			"I4I4I4I4",
			"I4======",
			"I4======",
		}, "illegal base32 data at input byte 0"},
	}

	for _, testcase := range testcases {
		testcase := testcase
		pr, pw := io.Pipe()
		go func() {