scale decoding of strings in structs is not working

[noot]

Currently, trying to use scale to decode structs where fields are strings or arrays of strings doesn't work.

Strings on their own (not in struct) works for encoding/decoding and encoding strings in structs is working fine.

eg. if we run this from the codec package:

func TestEncodeAndDecodeStringInStruct(t *testing.T) {
	test := &struct{
		A string
	} {
		A: "noot",
	}

	enc, err := Encode(test)
	if err != nil {
		t.Fatal(err)
	}

	dec, err := Decode(enc, &struct{A string}{A: ""})
	if err != nil {
		t.Fatal(err)
	}

	if !reflect.DeepEqual(test, dec) {
		t.Fatalf("Fail: got %v expected %v", dec, test)
	}
}

This will not work, the resulting A field will be empty: Fail: got &{} expected &{noot}

A workaround right now is to cast all strings in a struct to []byte then use scale, which works fine.

for example, this works:

func TestEncodeAndDecodeByteArrayInStruct(t *testing.T) {
	test := &struct{
		A []byte
	} {
		A: []byte("noot"),
	}

	enc, err := Encode(test)
	if err != nil {
		t.Fatal(err)
	}

	dec, err := Decode(enc, &struct{A []byte}{A: []byte{}})
	if err != nil {
		t.Fatal(err)
	}

	if !reflect.DeepEqual(test, dec) {
		t.Fatalf("Fail: got %v expected %v", dec, test)
	}
}