t.Errorf("got nil error, want ErrFormat")
	}
	if r != nil {
		t.Errorf("got non-nil Reader, want nil")
	}
}

// Verify we return ErrUnexpectedEOF when reading truncated data descriptor.
func TestIssue11146(t *testing.T) {
	data := []byte("PK\x03\x040000000000000000" +
		"000000\x01\x00\x00\x000\x01\x00\x00\xff\xff0000" +
		"0000000000000000PK\x01\x02" +
		"0000\b0\b\x00000000000000" +