issue: nil pointer of struct which has supported-type-fields returns error

[AsterDY]

reason

• *http.Request has unsupported type fields like GetBody func() (io.ReadCloser, error), but the passed obj is nil, thus std think it is a nil pointer and encode it as nothing, while sonic report error when compiling the ptr type

  codes

  
  import (
  "encoding/json"
  "net/http"
  "testing"
  
  "github.com/bytedance/sonic"
  jsoniter "github.com/json-iterator/go"
  "github.com/stretchr/testify/assert"
  )

type Context struct { *http.Request }

func TestContext(t *testing.T) { var obj = new(Context) out, err := sonic.Marshal(obj) out1, err1 := jsoniter.Marshal(obj) out2, err2 := json.Marshal(obj) println(string(out2)) assert.Equal(t, err2 ==nil, err1 ==nil) assert.Equal(t, err2 ==nil, err ==nil) assert.Equal(t, out2, out1) assert.Equal(t, out2, out) // err = sonic.Unmarshal(out, obj) // if err != nil { // t.Fatal(err) // } }

## result 

--- FAIL: TestContext (0.02s) Error: Not equal: expected: true actual : false Test: TestContext Error: Not equal: expected: []byte{0x7b, 0x7d} actual : []byte(nil)

                        Diff:
                        --- Expected
                        +++ Actual
                        @@ -1,4 +1,2 @@
                        -([]uint8) (len=2) {
                        - 00000000  7b 7d                                             |{}|
                        -}
                        +([]uint8) <nil>

        Test:           TestContext

FAIL