Failed to unmarshal while "encoding/json" is working fine

[susuper]

The following code is working fine with "encoding/json" (msg fields are propagated after unmarshal). Unfortunately the "github.com/goccy/go-json" is unable to unmarshal.

package main

import (
	"encoding/json"
	"fmt"
	"os"
)

type Message struct {
	ChannelID   int64
	Data        json.RawMessage
	ChannelName string
	Pair        string
	Sequence    Seq
}

type Seq struct {
	Value int64 `json:"sequence"`
}

func (msg *Message) UnmarshalJSON(data []byte) error {
	var raw []json.RawMessage
	if err := json.Unmarshal(data, &raw); err != nil {
		return err
	}

	if len(raw) < 3 {
		return fmt.Errorf("invalid data length: %#v", raw)
	}

	body := make([]interface{}, 0)
	if len(raw) == 3 {
		body = append(body, &msg.Data, &msg.ChannelName, &msg.Sequence)
	}

	body = append(body, &msg.ChannelID, &msg.Data, &msg.ChannelName, &msg.Pair)

	return json.Unmarshal(data, &body)
}

func main() {
	data := []byte(`[4688,{"as":[["28.15860","100.00000000","1621372849.562940"]],"bs":[["28.13020","1.28798426","1621372848.211647"]]},"book-10","DOT/GBP"]`)

	var msg Message
	if err := json.Unmarshal(data, &msg); err != nil {
		fmt.Printf("error while unmarshaling JSON: %v", err)

		os.Exit(0)
	}

	fmt.Printf("Channel name is %s", msg.ChannelName)
}

Go Playground

Thank you for your work!

[goccy]

Thank you for the great reporting ! ( and Thank you for being a sponsor ! )
Probably, I fixed this issue with #229

[susuper]

Thank you, it works now.