}

type Bug4Secret struct {
	a int // error: no exported fields.
}

// Test that a failed compilation doesn't leave around an executable encoder.
// Issue 3723.
func TestMultipleEncodingsOfBadType(t *testing.T) {
	x := Bug4Public{
		Name:   "name",
		Secret: Bug4Secret{1},
	}
	buf := new(bytes.Buffer)
	enc := NewEncoder(buf)
	err := enc.Encode(x)
	if err == nil {